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1.长沙理工大学 土木工程学院,长沙 410114
2.中南林业科技大学 土木工程学院,长沙 410004
3.湖南文理学院 土木建筑工程学院,湖南 常德 415000
WANG Da (1980- ), PhD, professor, main research interest: steel-concrete composite structure, E-mail: yxwang2006@yeah.net.
TAN Benkun (corresponding author), PhD, E-mail: tanbenkun@yeah.net.
Received:17 January 2024,
Published:25 April 2026
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王达,邵育新,谭本坤等.铺装层温度效应影响下钢桥面板焊接细节的疲劳性能[J].土木与环境工程学报,2026,48(02):199-211.
WANG Da,SHAO Yuxin,TAN Benkun,et al.Fatigue properties of welded details of steel bridge deck under temperature variation of pavement layer[J].Journal of Civil and Environmental Engineering,2026,48(02):199-211.
王达,邵育新,谭本坤等.铺装层温度效应影响下钢桥面板焊接细节的疲劳性能[J].土木与环境工程学报,2026,48(02):199-211. DOI: 10.11835/j.issn.2096-6717.2024.034.
WANG Da,SHAO Yuxin,TAN Benkun,et al.Fatigue properties of welded details of steel bridge deck under temperature variation of pavement layer[J].Journal of Civil and Environmental Engineering,2026,48(02):199-211. DOI: 10.11835/j.issn.2096-6717.2024.034.
为研究沥青铺装层温度效应对正交异性钢桥面板焊接细节疲劳性能的作用机制,基于线弹性断裂力学理论,系统分析铺装层温度效应对焊接细节应力及顶板焊趾处疲劳裂纹尖端应力强度因子的影响规律,并基于XGBoost算法构建裂纹修正系数预测模型。结果表明:沥青铺装层厚度及其温度效应对钢桥面板焊接细节疲劳性能的影响不可忽略;高温情况下,顶板焊趾处的疲劳裂纹扩展速率较快,裂纹形态比对有效应力强度因子的影响更为显著,仅通过应力指标评估铺装层温度效应对钢桥面板焊接细节疲劳性能的影响存在安全隐患;顶板焊趾处的应力及裂纹尖端的有效应力强度因子与铺装层温度效应呈非线性相关;结合建立的裂纹修正系数预测模型,能有效预测疲劳裂纹尖端的有效应力强度因子,便于工程中快速评估温度影响下焊接细节的疲劳性能。
In order to study the influence of asphalt pavement temperature on the fatigue properties of welded details of an orthotropic steel bridge deck based on linear elastic fracture mechanics
this paper studies the influence of asphalt pavement temperature on the stress of welded details and the stress intensity factor of a fatigue crack tip at the weld toe of the roof. A crack correction coefficient prediction model is established based on the XGBoost algorithm. The results show that the influence of asphalt pavement thickness and temperature effect on the fatigue properties of welded details of steel bridge decks cannot be ignored. Under high temperature conditions
the fatigue crack propagation rate at the weld toe of the roof is faster
and the crack shape ratio has a greater influence on the effective stress intensity factor. Therefore
it is unsafe to evaluate the effect of pavement temperature on the fatigue performance of welded details of steel bridge decks only by stress. The stress at the weld toe of the roof and the effective stress intensity factor at the crack tip are nonlinearly related to the temperature effect of the pavement layer. Combined with the prediction model of the crack correction coefficient established in this paper
the effective stress intensity factor of the fatigue crack tip can be effectively predicted
which is convenient for the rapid evaluation of the fatigue properties of welded details under the influence of temperature in engineering.
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