最新刊期
卷 48 ， 期 5 ， 2026
- 摘要：The present study investigates the seismic performance of partially encased composite steel-concrete columns with T-shaped sections (abbreviated as T-PEC columns). Five T-PEC column specimens with different axial compression ratios and main steel component (MSC) configurations are tested under cyclic horizontal load. Furthermore, MSCs are available in various forms, including solid-web steel and honeycomb steel with openings in the steel web. Based on the test and finite element (FE) analysis results, the impact of steel web openings and the axial compression ratio on the seismic performance of T-PEC columns is investigated. The findings indicate that all T-PEC column specimens failed in proximity to the column base, exhibiting plastic softening of the steel flange and adjacent concrete crushing. This is indicative of a typical cross-section compression-bending failure mode. The load-displacement hysteresis curves of all specimens were full, with the hysteresis loops at the same loading level almost coinciding, indicating effective energy dissipation and load-bearing stability. Steel web openings degraded deformability, ductility, and energy dissipation capacity of T-PEC columns. As the axial compression ratio increased, the lateral stiffness and lateral resistance capacity of the T-PEC columns increased, but the deformability, ductility, and energy dissipation capacity decreased. Both the full-section plasticity method and numerical integration method provided reasonably accurate estimates of the flexural capacity of the T-PEC column sections under the action of compression-bending load.关键词：steel-concrete composite column;T-shaped section column;lateral bearing capacity;flexural capacity;stiffness;ductility17|19|0更新时间：2026-10-15
- 摘要：A novel prefabricated reinforced concrete column-steel beam composite joint (PRCSJ) based on tenon-mortise connection is proposed to address seismic resilience issues in prefabricated steel-concrete composite structures. A series of quasi-static tests was conducted on three edge PRCSJ specimens, with the axial compression ratio and the strength of post-cast concrete serving as parameter variables. The objective of this study was to investigate the effects of different parameters on the load-bearing capacity, ductility, energy dissipation capacity, and performance degradation of PRCSJs, and to evaluate the rigidity of the joints. The findings suggest that PRCSJs demonstrated connection failure at the beam end, thereby adhering to the “strong column-weak beam” seismic design principle. The PRCSJs demonstrate plump spindle-shaped hysteresis curves, with distinct elastic, elastic-plastic, and failure stages. The average ductility coefficients range from 2.76 to 4.88 and the equivalent viscous damping coefficients from 0.28 to 0.31, demonstrating good ductility and energy dissipation capacity. The utilization of post-cast ultra-high performance concrete has been demonstrated to enhance the load-bearing capacity of PRCSJs, augment overall joint deformation, and mitigate cracking in the post-cast concrete area. Increasing the axial compression ratio (0.15~0.3) has been shown to enhance the initial stiffness whilst reducing ductility and stiffness degradation capacity of the joints. PRCSJs act as semi-rigid and partial-strength joints under lateral displacement.关键词：prefabricated;composite joint;axial compression ratio;ultra-high performance concrete;rigidity assessment41|40|0更新时间：2026-10-15
- 摘要：In order to evaluate the applicability of commonly used damage-controllable construction methods for masonry-infilled reinforced concrete (RC) frames, a comprehensive pseudo-static test database was established. The database under consideration comprised 63 specimens, which were divided into 17 groups of masonry-infilled RC frames. These groups included bare frames, rigid connections, and damage-controllable specimens. The influence of these construction methods on the mechanical performance of the specimens was systematically analyzed in terms of initial stiffness, maximum load-bearing capacity, displacement ductility, and wall damage patterns. The findings of the present study indicate that damage-controllable construction methods are predominantly concentrated in two areas: the wall-frame interface and the internal structure of the wall. The configuration of the wall-frame interface is intended to mitigate the wall-frame interaction, while the design of the internal structure of the wall seeks to achieve zoning damage control within the wall, thereby improving failure modes. These damage-controllable construction methods can effectively mitigate the excessive initial stiffness and reduce ductility of the specimens observed in traditional rigid connections, albeit at the cost of some load-bearing reserve. Furthermore, compared with the wall-frame interface construction methods, the internal construction methods of the wall show more significant improvements in the displacement ductility, the post-peak mechanical performance, and the damaged area ratio of the specimens, rendering them a preferred choice for enhancing the resilience of the wall.关键词：masonry-infilled wall;damage-controllable;mechanical performance;construction method;wall damage pattern19|20|0更新时间：2026-10-15
- 摘要：Debonded delamination is a typical form of damage to honeycomb sandwich panels (HSPs), which can have a significant impact on the integrity and safety of HSP structures. However, monitoring signals are insensitive to the debonded delamination. In order to address the issues of the wave performance applicability of the deformation-based equivalent model for HSP structures and the difficulty in sensing signal feature extraction for debonded delamination identification, an equivalent conversion method is used by changing an HSP structure into a three-layered periodic structure, and the Comsol Multiphysics software is applied to calculate and draw frequency dispersion curves. The present study investigates the applicability of guided wave performance in the two models by comparing two kinds of finite element (FE) analysis results from the equivalent and actual models of the HSP structure. The FE method is employed to investigate the feature of the debonded-induced-split flow of guided waves. The model tests are used to validate the correctness of the frequency dispersion performance and the debonded-induced-split-flow feature of high-frequency guided waves. The findings indicate that the discrepancy in wave performance between the equivalent conversion and actual models is pronounced, given that the wavelength of the guided wave is less than a single cell height in the HSP. The debonded delamination is the main reason for the debonded-induced-split flow, and it is recommended that the time-domain sensing signals of high-frequency activated A0 mode guided waves are used as extracted features for the debonded delamination identification of HSP structures.关键词：honeycomb sandwich panels (HSPs);ultrasonic guided waves (UGWs);frequency dispersion characteristics;high-frequency guided wave;wave performance;debonded delamination identification13|25|0更新时间：2026-10-15
- 摘要：In order to investigate the influence of environmental humidity on the self-healing performance of damaged ultra-high-performance concrete (UHPC), pre-cracks were induced in the specimens by loading, and then the specimens were subjected to secondary curing in four different environments: continuous immersion, wet-dry cycling, natural curing, and air-tight isolation. Subsequently, a series of rigorous evaluations was conducted, encompassing compressive and flexural tests, along with ultrasonic testing. The self-healing performance of UHPC were evaluated based on several criteria, including its appearance, mechanical properties, compactness, and micro-morphology. The findings indicate that environmental humidity exerts a substantial influence on the self-healing performance of the specimens. The discrepancy in the self-healing rate across varying humidity environments can be attributed to the migration and transportation of water. In water-deficient environments (air-tight isolation and natural curing), no obvious healing products were observed at the cracks of the specimens, and the recovery rates of strength and compactness of the specimens were low. In water-saturated environments (wet-dry cycling and continuous immersion), abundant visible healing products were observed at the cracks in the specimens. These products were composed of calcium hydroxide (Ca(OH)2) and calcium silicate hydrate (C-S-H) gel and were capable of effectively repairing the cracks. The recovery rates of strength and compactness of the specimens were superior in these environments. The recovery rates of strength and compactness of the specimens increased with the damage degree of the specimens. In the continuous immersion environment, compared with the specimens with a damage degree of 70%, the specimens with a damage degree of 90% had an increase of 16.59% in compressive strength recovery rate, an increase of 11.19% in flexural strength recovery rate, and a maximum increase of 64.43% in compactness recovery rate.关键词：ultra-high-performance concrete (UHPC);pre-damage;autogenous healing;ambient humidity;ultrasonic testing35|20|0更新时间：2026-10-15
- 摘要：The addition of large-diameter hyperelastic NiTi shape memory alloy (NiTi-SMA) bars to damping elements has been demonstrated to achive effective self-centring capability. However, given the high sensitivity of SMA materials to temperature, it is important to note that different heat treatment processes can have a certain impact on the mechanical properties of NiTi-SMA bars. This, in turn, can result in varying degrees of influence on the energy dissipation and self-centering ability of dampers or supports containing NiTi-SMA bars. It is therefore essential to conduct a thorough investigation into the impact of diverse heat treatment processes on the mechanical properties of large-diameter NiTi-SMA bars. This article first conducted different heat treatment processes on seven Ni-59.9% at Ti bars with a working section diameter of nine mm, followed by amplified cyclic tensile tests to investigate the effects of different heat treatment processes on the stress-strain relationship, residual strain, energy dissipation capacity, and other properties of the specimens. The research results indicate that appropriate heat treatment can significantly improve the superelasticity of NiTi-SMA bars, with typical flag-shaped stress-strain curves. The present study investigates the effects of heat treatment temperature and duration on the properties of NiTi-SMA bars with a working diameter of nine mm . The results demonstrate that the optimal heat treatment process for these bars is 400 ℃ for 30 minutes. It is observed that as the heat treatment process approaches the optimal value, the energy dissipation capacity, secant stiffness, and equivalent damping ratio of the specimens exhibit increased stability.关键词：shape memory alloy;amplified cyclic tensile test;heat treatment;hyperelasticity;self-centering16|10|0更新时间：2026-10-15
- 摘要：The increasing horizontal displacements caused by extremely rare seismic events impose strict demands on the energy dissipation capacity and adaptive performance of damping devices. Nonetheless, conventional friction dampers typically rely on a constant preload, which is achieved through the use of high-strength bolts. This mechanism inherently lacks adaptability, as the friction force cannot vary with seismic intensity, thereby limiting the damper’s efficacy during severe ground motions. To address this limitation, a non-preload variable friction inerter (NVFI) was previously proposed. Theoretical analysis and quasi-static experiments have confirmed its superior characteristics, namely the elimination of preload and adaptive variation of damping force. This study develops a robust numerical model for the NVFI by implementing a user-defined element (VUEL-NVFI) within the ABAQUS/Explicit platform. The fidelity and stability of the VUEL are rigorously validated against MATLAB numerical solutions under both harmonic and seismic loading, accurately capturing the device’s characteristic “butterfly shape” hysteretic behavior. The validated VUEL is subsequently integrated into a high-fidelity, three-dimensional model of a 10-storey reinforced concrete frame in order to systematically investigate its seismic mitigation mechanisms under multi-level earthquake intensities. Analyses demonstrate that the NVFI’s damping force and energy dissipation capacity adaptively scale with increasing ground motion intensity. Under exceedingly rare earthquake scenarios, the NVFI-equipped structure exhibits good efficacy in mitigating inter-story drift, achieving a maximum reduction rate of 56.05% and significantly enhancing overall seismic performance. The VUEL element developed herein provides a reliable computational tool for the engineering analysis of NVFI systems. The device’s adaptive mitigation mechanism demonstrates significant application potential for the collapse-prevention design of structures subjected to extreme seismic events.关键词：variable friction inerter;non-preload;inertial effect;secondary development;seismic performance29|19|0更新时间：2026-10-15
- 摘要：The safety of nuclear power plants (NPPs) in the event of an earthquake is of great significance to the development of nuclear energy. In order to study the influence of structural parameter uncertainty on the random seismic response of NPPs, a random response analysis method considering structural parameter uncertainty is proposed based on cubature formula. By utilising the random vibration theory, the expression of response power spectrum considering structural parameters is derived. The proposed method is verified by a single degree of freedom model. The findings indicate that the consideration of structural parameter uncertainty exerts a substantial influence on the response power spectrum. The power spectrum value of structural response is more dispersed in the frequency range due to the randomness of its parameters. The root mean square of response obtained by cubature formula is closer to the results of Monte Carlo simulation (MCS) and is larger than the results without considering the parameter uncertainty. A finite element model of an NPP is established, and the random seismic response considering the uncertain material parameters of the NPP structure is calculated based on cubature formula. The results show that the maximum response of the structure will be underestimated and its reliability will be overestimated in the absence of consideration for the uncertainty of structural parameters.关键词：nuclear power plant;random vibration;random seismic response;structural parameter uncertainty;cubature formula25|12|0更新时间：2026-10-15
- 摘要：The seismic active earth pressure is the primary load for the seismic design of retaining structures in seismic zones. The prevailing calculation theories of seismic earth pressure focus on semi-infinite backfill, which makes them unsuitable for calculating the seismic earth pressure of limited soil. Combining the pseudo-dynamic method with the horizontal differential element method, this paper establishes differential equations considering the soil arching effect, solves them numerically with the finite element method, and analyzes in detail the influence laws of main parameters on the distribution of seismic active earth pressure in limited soil. The results show that when calculating the seismic active earth pressure of limited soil, the most unfavorable combination of seismic inertial forces is downward vertical seismic inertial force and horizontal seismic inertial force pointing towards the retaining wall. The influences of the horizontal seismic coefficient and the width of limited soil on the seismic active earth pressure coefficient are relatively small. The effects of the horizontal seismic coefficient, the width of limited soil, the cohesion of backfill, the internal friction angle and the external friction angle between the wall and soil on the seismic active earth pressure in Zone Ⅱ of limited soil are significant. The seismic wave velocity only affects the time when the seismic active earth pressure of limited soil reaches its amplitude.关键词：limited soil;seismic earth pressure;pseudo-dynamic method;horizontal differential element method16|20|0更新时间：2026-10-15
- 摘要：The analytical solution offers distinct advantages in comprehending the impact of terrain conditions on ground motion; however, extant research is predominantly constrained to a single frequency steady-state response and frequency domain solution. In this paper, the probability of exceeding the surface amplification coefficient of the semicircular terrain in a hard field is studied by using the analytical method and the time domain analysis of a large number of measured strong earthquake records, and the distribution law of the concave boundary radius and the surface amplification coefficient is proposed. The wave function expansion method is utilized to derive the analytical solution of the peak acceleration amplification coefficient of the surface plane wave scattering field in the semicircular terrain. A total of 100 earthquake records were extracted from the important strong earthquake network at home and abroad to form the input ground motion. According to the specification, a typical hard field was taken, and the excess probability of the surface amplification coefficient of the semicircular terrain was calculated by time-frequency transformation. The results show that the boundary radius of the concave body exists, that is, for any semi-circular sag terrain that exceeds the boundary radius, the surface acceleration amplification coefficient will achieve a stable convergence and consistent result in the engineering sense. The boundary radius of the semicircular terrain on a hard field is proportional to the shear wave velocity of the site. In the case of depressions that exceed the boundary radius, the surface acceleration amplification factor exhibits a variation between 0.3 and 2.0, contingent on the angle of the incident wave and different observation points.关键词：semicircular concave terrain;influence field;boundary radius;surface acceleration amplification coefficient16|31|0更新时间：2026-10-15
- 摘要：China’s offshore waters are located in the Pacific Rim seismic zone, and the large-diameter group pile foundations commonly used in marine engineering are facing a seismic threat. A 1g shaking table model test was utilised to investigate the effects of ground vibration characteristics, seismic intensity and pile arrangement on the dynamic responses of pore water pressure, soil acceleration and pile bending moment of the soil surrounding the pile. The findings indicate that, under analogous conditions, the Taft seismic wave is more prone to induce liquefaction of the soil surrounding the piles, exhibiting a greater number of cycles and a lower principal frequency in comparison with the El-Centro seismic wave; the principal frequency of the El-Centro seismic wave is closer to the intrinsic frequency of the modelled foundation, which leads to the more significant peaks in the base acceleration and bending moment responses. Under the same amount of consumables, the excess pore pressure ratio response of the soil around the piles of the nine-pile arrangement is stronger than that of the four-pile arrangement; under all the loading conditions, the acceleration response of the four-pile foundation is stronger due to the fact that the soil is easier to liquefy in the shallow region, and the degree of liquefaction of the four-pile foundation is lower, whereas this pattern is opposite in the deeper region; the bending moment distribution of the nine-pile foundation is more uniform, and the seismic performance of the nine-pile foundation is stronger than that of the four-pile foundation. On the whole, the seismic performance of the nine-pile foundation is superior.关键词：large-diameter group piles;pile-soil system;shaking table test;seismic response;offshore platforms10|11|0更新时间：2026-10-15
Earthquake Disaster Prevention and Mitigation Engineering
- 摘要：The development process of seepage erosion is complex, influenced by numerous factors, and disasters triggered by seepage erosion are frequent, posing serious threats to structural safety. In order to study the effects of various factors on seepage erosion under vibration, this paper employs a CFD-DEM coupled analysis method. A series of experiments was conducted to investigate the effects of fine particle content, confining pressure, and hydraulic gradient on the seepage erosion process under vibration. The micro-responses of the gap-graded sand samples were analyzed based on the fine particle loss ratio and axial deformation. The findings indicate that under conditions of vibration, there is an increase in the fine particle loss ratio, and axial deformation is more pronounced. The vibration exerts an aggravating effect on the seepage erosion, with the greatest effect on the upper layer particles, while the middle layer particles are least affected. Higher fine particle content leads to greater fine particle loss and longer stabilization time, making it a significant factor affecting axial deformation. Greater confining pressure results in more fine particle loss and axial deformation, with confining pressure having a mitigating effect on vibration. In the development stage of seepage erosion, a larger hydraulic gradient results in a higher fine particle loss ratio, with the hydraulic gradient having the least effect on axial deformation.关键词：vibration action;seepage erosion;CFD-DEM coupled analysis method;influencing factors9|21|0更新时间：2026-10-15
- 摘要：During normal operation of the Three Gorges Reservoir, the water level would experience periodic fluctuations, and the rate of water level rise and fall has a significant impact on the stability of the reservoir slopes. Considering the Wushan Taping H1 landslide in the reservoir area as a prototype, a transparent soil model testing system for reservoir landslides has been designed. This system includes a transparent soil landslide model box, a water level fluctuation system, and a computer image acquisition system. The tests were carried out at different rates of water level rise and fall, and the deformation of the transparent soil slope model was obtained by using the particle image velocimetry technology. The deformation characteristics and evolution pattern of the landslide were analysed. The results indicate that during water level rise, landslide deformation progresses from the front to the rear, while during water level fall, the deformation progresses from back to front, with greater deformation caused by water level fall. As the rate of water level fluctuation increases, the dynamic water pressure effect within the landslide and the groundwater level lag effect become more pronounced, resulting in increased deformation and more evident deformation characteristics of the landslide. The surface displacement variation curve of the landslide shows a step-like progression, with horizontal displacement increasing significantly more than vertical. An increased rate of water level fluctuation results in greater landslide displacement during intervals when the water level remains unchanged, indicating a decrease in stability.关键词：transparent soil test;reservoir landslide;rate of water level rise and fall;deformation evolution28|12|0更新时间：2026-10-15
- 摘要：Crushing waste tires into rubber particles and blending them with sand to form rubber sand as a lightweight backfilling material for application in the field of geotechnical engineering is a promising measure for dealing with waste tires. Sand and rubber particles exhibit distinct mechanical characteristics during the compression process, resulting in a complex and unpredictable compression process of rubber sand. Based on this, one-dimensional compression tests of transparent rubber sand were carried out, considering the influences of rubber content and vertical pressure. The deformation characteristics of rubber particles were obtained through image processing technology, the deformation mechanism of rubber sand was explored, and a characterization model for the compression properties of rubber sand was established. The results indicate that the total vertical strain of rubber sand increases with rubber content. The plastic strain is greater than the elastic, and the plastic strain accounts for over 64% of the total vertical strain. The rubber particles have significant compression deformation, and their vertical strain can account for up to 45% of the total. Compared with pure sand, the increment of compression deformation of rubber sand mainly originates from the compression deformation of rubber particles themselves and the deformation caused by the rolling and rearrangement of surrounding sand particles due to the deformation of rubber particles. Based on the compression models of pure sand and rubber, a characterization model for the compression properties of rubbersand under different rubber contents and vertical pressures was established, with good applicability.关键词：transparent soil;rubber sand;compression characteristics;characterization model20|28|0更新时间：2026-10-15
- 摘要：To delve into the micromechanical deformation and failure mechanisms of the geotextile-soil interface, a series of direct shear test models for granite residual soil containing different rock contents (50%, 75%, and 100%) with geotextiles under two loading conditions (normal static load and normal cyclic load) were established using the discrete element software PFC3D, based on the results of large-scale direct shear tests. The study analyzed changes in micromechanical shear characteristics such as porosity, coordination number, fabric anisotropy, and particle rotation at the geotextile-soil interface. The results indicated that the change in sample porosity increased with higher rock content and was primarily concentrated near the shear plane, with normal cyclic loading causing a slight increase as well. The coordination number at the interface ranged from 5.19 to 6.05, 4.74 to 5.77, and 4.35 to 5.53 as the rock content increased, indicating a reduction in particle contacts. Under both loading conditions, the principal direction of anisotropy of contact forces between particles shifted, with the normal contact forces under normal static load greater than those under normal cyclic load. The average rotation angle of particles with 100% rock content was smaller than that with 50%, and normal cyclic loading caused a slight increase. Overall, the rotation angle followed a normal distribution, with the maximum value located near the shear plane.关键词：soil-geosynthetic interface;granite residual soil;numerical simulation;gravel content;micromechanical analysis19|10|0更新时间：2026-10-15
- 摘要：This study aims to investigate the mechanical properties and acoustic emission (AE) characteristics of sandstone with different water contents subjected to wet-dry cycles. The sandstone samples were collected from the surrounding rock of a subway station tunnel project in Chongqing. The samples underwent 0, 10, 20, and 30 wet-dry cycles, and the tests were conducted by controlling the water content of the sandstone (dry, 1.2%, 2.4%, 3.6%, and saturated) at different cycle stages. Uniaxial compression tests and acoustic emission monitoring were performed, along with scanning electron microscope (SEM) analysis to examine the microstructure of sandstone after different numbers of wet-dry cycles. The results show that with an increase in the number of wet-dry cycles, the pore structure of the sandstone deteriorates, with more fractures and detachment of crystal grains, leading to a nonlinear decay in uniaxial compressive strength. Higher water content further exacerbates strength degradation. The increase in water content significantly reduces the AE activity during the sandstone failure process and alleviates the degree of fragmentation, reflecting weakened internal microcrack propagation and energy release. Wet-dry cycling and water content exhibit a synergistic effect on the degradation mechanism of sandstone.关键词：sandstone;wet-dry cycles;water content;uniaxial compression;mechanical properties;acoustic emission20|28|0更新时间：2026-10-15
- 摘要：Calcium sources and treatment rounds are important factors that influence the MICP coating effect. To explore the influence of the two factors on the MICP coating effect on sandy loess, three calcium sources (calcium chloride, calcium acetate and calcium lactate) were selected to treat the model slope for four different rounds, and the calcium carbonate content, lab rainfall scouring test and micro-penetration test were carried out on the samples after coating. The results show that the coating forms of different calcium sources are different. Calcium chloride and calcium acetate mainly strengthen the soil by increasing the cohesion between soil particles through the cementation of calcium carbonate in the pores of the soil, while the soil treated with calcium lactate has a low content of calcium carbonate, and calcium carbonate is more likely to form a coating on the surface of the soil. The influence of different calcium sources on the MICP coating effect of sandy loess is mainly reflected in three aspects: calcium carbonate content, calcium carbonate crystal form and curing depth, and the coating effects of different calcium sources under different treatment rounds are also different. When calcium chloride is used as a calcium source, the calcium carbonate is mainly calcite. When the treatment is more than three rounds, the effect of coating is better, but after more than five rounds of treatment, the effect of coating is not obvious. When calcium acetate and calcium lactate are used as calcium sources, the generated calcium carbonate is mainly aragonite. Although the effect of coating is poor when the soil is treated with calcium acetate for one round, the effect of coating increases significantly with the number of rounds; when used for multiple rounds, calcium acetate can be used to replace calcium chloride. With calcium lactate as a calcium source, the effect of coating is the best. When the treatment is more than three rounds, the effect is not as good as that with calcium chloride and calcium acetate; calcium lactate is suitable for short-term urgent treatment.关键词：microbially induced calcium carbonate precipitation (MICP);calcium source;treatment rounds;microbial coating;sandy loess;slope erosion12|11|0更新时间：2026-10-15
- 摘要：Engineering challenges related to saline soil roadbed disaster prevention and mitigation, land resources, protection of rock relics, geothermal development, carbon dioxide geological storage, and nuclear waste disposal have recently become increasingly prominent. A critical factor in addressing these issues is understanding the coupling theory of thermohaline double diffusion in rock and soil. This theory is essential for preventing soil salinization, preventing deterioration of infrastructure and decay of rock relics, enhancing heat extraction efficiency, improving sealing effectiveness, and reducing groundwater pollution. This paper first summarizes the methods related to the coupling theory of thermohaline double diffusion in rock and soil. It then systematically reviews typical theoretical models in this field, followed by the future research directions for the coupling theory of thermohaline double diffusion, particularly in the context of modern energy demands and environmental protection needs. Comparative analyses of different coupling models of thermohaline double diffusion are also presented. Finally, the importance of studying the coupling theory of thermohaline double diffusion in rock fissures is highlighted, especially in relation to critical engineering problems such as CO2 storage in saline aquifers, geothermal exploitation in salt zones, and nuclear waste disposal in salt caverns. Additionally, the paper outlines future research prospects for the coupling of thermohaline double diffusion with mechanical effects in the context of rock and soil conservation, particularly for the preservation of cultural relics.关键词：saline soil;thermohaline transport;double diffusion;coupling effect;theoretical model14|11|0更新时间：2026-10-15
- 摘要：In order to explore the influence of stacking load on buried PE pipeline in engineering application, a typical buried PE pipe model test under the action of stacking load was carried out by means of an independently designed pipeline test system. The results show that the stacking load has a significant effect on the mechanical properties of the pipeline. The peak of the strain around the pipe appears below the load and decreases towards both ends of the pipe. The strains on the cross section of the pipeline develop symmetrically under vertical stress. The strain of the pipeline is non-linear, and it goes through two stages of slow and fast growth, with increase rates of 40% and 76.3%, respectively. The interaction between the pipeline and soils results in different stress states along the axial direction while the pipeline generally shows axial stretching. Simultaneously, due to the residual stress in the soil, the elastic recovery of the pipeline is inhibited under the pipe-soil interaction, and the pipeline presents a beam-type bending and a deflection curve-like shape. Additionally, both ends of the pipeline are constrained and the soil resistance produces a small degree of reverse displacement, and the overlying soil sinks or rises with the deformation of the pipeline. The additional stacking load caused by the accumulation gradually diffused and dissipated to the deep soil layer. When the buried depth of the pipeline increased, the pressure composition of the pipeline would be mainly determined by the self-weight of the soil.关键词：buried pipeline;stacking load;pipe-soil interaction;model test;mechanical property16|22|0更新时间：2026-10-15
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Evaluation of typhoon WRF simulation parameterization schemes based on entropy weight TOPSIS method AI导读
摘要：The typhoon is extremely strong, and the accurate simulation of its track and intensity is directly related to the safety design, site selection, disaster prevention and mitigation measures of sea-crossing bridges in the typhoon-affected area. In this paper, Typhoon Kalmaegi (1415) is taken as the example, and twelve combinations of physical parameterization schemes are selected to carry out numerical simulation of typhoon wind field based on the WRF model. The simulated period is divided into period one and period two depending on whether the wind field structure within the radius of the maximum wind speed is affected by land. Combined with the CMA best-track dataset, the simulation errors of each parameterization scheme and its combination on the track, central minimum pressure and maximum wind speed in the two periods are specifically compared. The entropy weight TOPSIS method is used to evaluate the schemes with the optimal simulation performance in the two periods, and the combination is compared with the measured buoy data for verification. The results show that the error of typhoon track simulated by the scheme without data assimilation is larger. The boundary layer YSU simulation has the least error in maximum wind speed, while the boundary layer MYJ simulation has the least error in central minimum pressure. In period one, the two schemes using boundary layer MYJ have the best simulation performance. In period two, the combined simulation performance of the microphysical scheme WSM6, radiation scheme RRTM/RRTM, boundary layer YSU and sea surface flux isftcflx-0 is the best. The combination of the two optimal schemes is in good agreement with the measured buoy data.关键词：typhoon;WRF model;physical parameterization schemes;maximum wind speed radius;entropy weight TOPSIS method29|34|0更新时间：2026-10-15 - 摘要：Resonance can lead to excessive vibration of trains and bridge structures, exacerbating fatigue and instability in bridge-track structures, further affecting the comfort and safety of train operations. Effectively eliminating resonance during the design phase and controlling resonance during service are crucial for ensuring the sound and sustainable development of high-speed railway transportation. This paper aims to review the research progress on resonance and cancellation issues of railway train/bridge systems, systematically summarize the mechanisms and patterns of resonance occurrence, and clarify cancellation design and resonance control methods. The paper covers six parts: the basic theory of bridge resonance and cancellation, train excitation models, resonance and cancellation issues of bridges of different types, major influential factors of bridge resonance and cancellation, bridge resonance control, and field experimental research. A review of the literature indicates that the conditions for bridge resonance and cancellation are influenced by boundary conditions, but generally coincide with or slightly differ from those of simply supported beams. Bridge spans and train compositions form typical bi-periodicity, which potentially results in “dual resonance” when the bridge-induced train resonance speed is equal to the train-induced bridge resonance speed. The coupling effect between trains and bridges reduces the resonance amplitude of bridges, but the actual train-bridge coupling system is stochastic and may lead to “random resonance”. For simply supported beams, the first mode dominates the resonance displacement, while the second mode has a significant impact on resonance acceleration, and higher-order mode effects can generally be ignored. For continuous beams, the second mode also generally contributes significantly to resonance displacement and cannot be therefore ignored. Damping in bridges can effectively reduce resonance amplitudes but may also cause “leaking effects” for cancellation. Regarding the cancellation measures,when the bridge span length L is 1.5 times the characteristic length d of the train, the first-order resonance of the bridge can be effectively eliminated, which serves as the optimal span design criterion for railway bridges. Furthermore, resonance conditions can also be actively avoided by setting lower frequency limits for bridges and changing train compositions. Results from extensive field tests indicate that the resonance of railway bridges is predominantly characterized by the first-order vertical bending mode. This resonance shows a significant correlation with the train speed and train length (i.e., v/d).关键词：vehicle-bridge interaction;railway bridge;resonance;cancellation20|48|0更新时间：2026-10-15
- 摘要：Temperature fluctuations caused by hot asphalt paving on bridge structures represent a transient process that is challenging for precise monitoring. To elucidate the temperature distribution patterns of bridge structures under hot asphalt paving, a study of the temperature field during the hot asphalt paving stage of steel-concrete composite beams was conducted. Firstly, by collecting empirical data on the temperature field of steel-concrete composite beams under hot asphalt paving, the temperature distribution characteristics of the steel-concrete composite beams during this process were analyzed. Subsequently, a temperature field model of the steel-concrete composite beam during hot asphalt paving was established using finite element (FE) software. The accuracy of the FE model was validated using measured data. Parametric analysis of the composite beam's temperature field during the hot asphalt paving stage was conducted. Finally, based on the results of the parametric analysis, a prediction formula for the vertical temperature difference of the steel-concrete composite beam under hot asphalt paving was proposed. Its applicability was validated using existing literature. Results indicated that the influential depth of asphalt high-temperature paving on steel-concrete composite beams mainly occurred within a range of 0.5 m and formed a large vertical temperature gradient. The vertical temperature difference pattern can be approximated by an exponential function, while the horizontal temperature difference pattern can be approximated by a sine function. The maximum vertical temperature difference is mainly influenced by the initial temperature of the beam T0, the thickness of the intermediate layer d, and the temperature of the asphalt mixture Ts. The calculated results from the proposed model are consistent with existing research, providing a reference for studying the temperature distribution of steel-concrete composite beams during asphalt hot-mix paving.关键词：bridge engineering;hot asphalt paving;steel-concrete composite beams;temperature gradient;temperature difference prediction equation10|20|0更新时间：2026-10-15
- 摘要：Accurate identification of cable tension holds significant practical importance, but the vibration-based tension estimation methods commonly used in engineering have the problem of complex and diverse calculation formulas. To achieve high-precision cable tension identification, the physics-informed neural network (PINN) is introduced into the field for cable tension identification in cable-stayed bridges. This method incorporates the string vibration equation representing cable tension as physical information into the loss function of the neural network, sets the cable force as a learnable parameter of the neural network, and uses the dynamic displacement response of the cable for network training. The cable tension can be identified by minimizing the loss function. Finite element models of five typical cables were established to obtain response data, and cable tension identification using this method was conducted. The results indicate that the identification error of this method does not exceed 3% in all set cable tension identification problems, demonstrating high accuracy. While the network’s predicted displacement field cannot fully reconstruct the actual displacement of the cable, it effectively restores the low-order vibration displacement field. On this basis, model bridge tests were conducted, verifying the effectiveness of the proposed method, confirming its high identification accuracy, strong reliability, and good scalability, making it suitable for identifying cable tension in real engineering applications.关键词：cable-stayed bridge;physics-informed neural network;oscillation equation;cable tension identification;parameter identification13|44|0更新时间：2026-10-15
- 摘要：This paper aims to investigate the axial compression performance of Q345-grade H-shaped steel columns after pitting corrosion. By combining theoretical derivation with numerical simulation, a method is proposed for calculating the loss of ultimate strength of H-shaped steel columns under axial compression after pitting corrosion. The study begins with axial compression tests on Q345-grade H-shaped steel columns to obtain baseline data, which are then used to validate the finite element model. This method is then validated through numerical simulations to ensure its accuracy and reliability. To further explore the impact of random pit size and location on the strength loss of the columns, a contribution function is established, quantifying the influence of individual pits on strength loss. Additionally, by introducing an interaction coefficient, the mutual interaction effects between pits are reflected, taking into account the relative size, distance, and angle of the pits more comprehensively. Finally, a series of finite element models incorporating randomly distributed pits is developed, and the finite element results are compared with the predictions of the proposed method to evaluate its applicability. Results indicate that this method can effectively predict the loss of ultimate strength in H-shaped steel columns after pitting corrosion, providing important theoretical support for related engineering applications.关键词：corroded steel column;pitting corrosion;ultimate strength;strength loss;computational method;numerical simulation16|20|0更新时间：2026-10-15
Civil Engineering
Research Progress Report
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