Statistical analysis and simulation of vehicle load considering traffic states division

YANG Donghui; GUAN Zexin; YI Tinghua; LI Hongnan

doi:10.11835/j.issn.2096-6717.2021.260

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Statistical analysis and simulation of vehicle load considering traffic states division

Civil Engineering | 更新时间：2022-11-07

- Statistical analysis and simulation of vehicle load considering traffic states division
- Journal of Civil and Environmental Engineering Vol. 44, Issue 6, Pages: 85-93(2022)
- 作者机构：
  
  1.大连理工大学土木工程学院，辽宁大连 116024
  2.华南理工大学亚热带建筑科学国家重点实验室，广州 510641
- 作者简介：
  
  brief:YANG Donghui (1985- ), PhD, associate professor, main research interests: bridge structural health monitoring and performance evaluation, E-mail: dhyang@dlut.edu.cn
  YI Tinghua （corresponding author）， professor， doctorial supervisor， E-mail： yth@dlut.edu.cn.
- 基金信息：
  
  National Natural Science Foundation of China(52078102;52050050;51978128);Open Projects of State Key Laboratory of Subtropical Architectural Science(2020ZB)
- DOI：10.11835/j.issn.2096-6717.2021.260
  CLC： U447
- Received：28 September 2021，
  
  Published：30 December 2022
- 稿件说明：
移动端阅览
杨东辉,管泽鑫,伊廷华等.考虑区分车辆运行状态的桥梁车载统计分析及模拟[J].土木与环境工程学报,2022,44(06):85-93.

YANG Donghui,GUAN Zexin,YI Tinghua,et al.Statistical analysis and simulation of vehicle load considering traffic states division[J].Journal of Civil and Environmental Engineering,2022,44(06):85-93.
杨东辉,管泽鑫,伊廷华等.考虑区分车辆运行状态的桥梁车载统计分析及模拟[J].土木与环境工程学报,2022,44(06):85-93. DOI： 10.11835/j.issn.2096-6717.2021.260.

YANG Donghui,GUAN Zexin,YI Tinghua,et al.Statistical analysis and simulation of vehicle load considering traffic states division[J].Journal of Civil and Environmental Engineering,2022,44(06):85-93. DOI： 10.11835/j.issn.2096-6717.2021.260.

摘要

动态称重系统作为桥梁结构健康系统的重要组成部分之一，能提供丰富的车辆荷载监测数据，在此基础上建立能反映实际交通状况的车辆荷载模型，对桥梁结构的安全评估、车致疲劳分析等具有重要意义。提出一种能考虑区分车辆运行状态的随机车流模拟方法和流程，在车辆荷载统计分析过程中通过各时段的车流量密集程度区分车辆运行状态，针对不同运行状态，引入单峰和多峰概率分布模型，对车重、车速、车间距等车辆荷载统计参数进行概率拟合，通过K-S检验获得车辆荷载参数的最优概率分布；通过Monte Carlo抽样模拟随机车流，进而分解为随机加载流；基于某实际桥梁的车辆荷载监测数据，对车辆荷载模拟方法的合理性进行验证。结果表明：采用区分车辆运行状态模拟的随机车流对桥梁结构进行加载，获得的钢箱梁跨中底板应力幅值和应力循环次数与实际车流加载结果接近。相比之下，如果不考虑区分车辆运行状态，得到的应力幅值和循环次数都明显小于实际车流的加载结果，这对于桥梁结构的车致疲劳分析偏于危险。

Abstract

The weigh-in-motion system is one of the important part of the bridge structure health system

which can provide abundant vehicle load monitoring data. On this basis

establishment of vehicle load model that can reflect the actual traffic conditions is of great significance for safety assessment and vehicle-induced fatigue analysis of bridge structures. This paper proposes a random traffic flow simulation method and process that considering different traffic states. In the process of vehicle load statistical analysis

the traffic states are divided by the vehicle flow intensity in each period. For different traffic states

the common single-peak probability distribution models and the multi-peak one are introduced to carry out probability fitting for vehicle weight

vehicle speed and vehicle spacing

and the optimal probability distribution of vehicle load parameters can be obtained by K-S test. The Monte-Carlo method is used to simulate random traffic flow

and then decomposed into random loading flow. Finally

the rationality of the vehicle load simulation method is verified based on the vehicle load monitoring data of an actual bridge. The results show that when the different traffic states are considered for random traffic flow simulation

the stress amplitudes and stress cycle times of the steel box girder lower flange at mid-span are close to the results induced by the actual traffic flow. By contrast

when the different traffic states are not distinguished for traffic flow simulation

the stress amplitude and the number of cycles obtained are significantly smaller than the actual

which would lead to risky results for the vehicle-induced fatigue analysis of the bridge structure.

关键词

Keywords

references

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