冲刷腐蚀下连续梁桥的地震易损性分析  

Seismic vulnerability analysis of continuous beam bridges under scour and corrosion

作　　者：邵林海 朱云会 黄琮 赵文剑 李俊杰 SHAO Linhai;ZHU Yunhui;HUANG Cong;ZHAO Wenjian;LI Junjie(Huahui Engineering Design Group Co.,Ltd.,Zhejinag Shaoxing 312000,China;School of Civil Engineering,Shaoxing University Zhejinag Shaoxing 312000,China)

机构地区：[1]华汇工程设计集团股份有限公司,浙江绍兴312000 [2]绍兴文理学院土木工程学院,浙江绍兴312000

出　　处：《低温建筑技术》2024年第11期86-90,共5页Low Temperature Architecture Technology

摘　　要：随着桥梁服役时间的延长,桥梁基础受到水流冲刷的影响,其稳定性逐渐降低。若发生地震,桥梁极易受到破坏。因此,确定结构的极限状态是进行易损性分析的关键。文中通过实际工程,比较在相同冲刷深度和腐蚀程度下不同性能水平的易损性曲线,在相同抗震性能水平和冲刷深度条件下不同腐蚀程度的易损性曲线,以及在相同性能水平和腐蚀情况下不同冲刷深度的易损性曲线。研究结果表明,随着抗震性能水平的提高,结构的超越概率降低;而冲刷情况对结构易损性曲线的影响显著,冲刷程度越深,相应性能水平的超越概率越大。这些发现为桥梁的安全评估和维护提供了重要的理论依据,强调了在设计和运营过程中应重视基础稳定性和材料退化的影响。As the service life of bridges increases,the stability of the bridge foundation gradually decreases due to scour from water flow.In the event of an earthquake,bridges are highly susceptible to damage.Therefore,determining the limit state of the structure is key to conducting vulnerability analysis.This paper,based on an actual engineering case,compares vulnerability curves under different performance levels with the same scour depth and corrosion degree,vulnerability curves under the same seismic performance level and scour depth with different corrosion degrees,and vulnerability curves under the same performance level and corrosion conditions with varying scour depths.The research results show that with the improvement in seismic performance,the exceedance probability of the structure decreases.Scour significantly impacts the vulnerability curves;the deeper the scour,the higher the exceedance probability for the corresponding performance level.These findings provide an important theoretical basis for bridge safety assessment and maintenance,emphasizing the need to consider foundation stability and material degradation in both design and operational processes.

关 键 词：冲刷腐蚀 连续梁桥 易损性曲线 

分 类 号：TU312[建筑科学—结构工程]