岩土工程学报2026，Vol.48Issue(4)：730-739,10.DOI:10.11779/CJGE20240923
跨断层简支梁桥在蠕滑断层作用下破坏特征与土压力变化研究
Study on failure characteristics and earth pressure change of simply supported beam bridge across fault under creep fault
摘要
Abstract
Fault displacement is a major hazard threatening the safety of bridges crossing faults.Compared to sudden stick-slip movements,creep fault displacements release stress at a low speed and continuous manner,potentially leading to progressive damage of bridge structures due to their cumulative effects.To investigate the effects of different types of fault displacements on bridges crossing faults,this study conducts a series of tests on a 1∶50 scale model of a simply supported beam bridge using a self-developed fault simulation test device.The displacement processes of strike-slip,normal,and reverse faults are simulated,and the failure characteristics and mechanisms of the bridge structure under different fault actions are comparatively analyzed.The results show that:(1)Different types of faults exhibit distinct movement characteristics,leading to varied destructive effects on bridges crossing faults;(2)The relative displacement of bridge piers and soil deformation caused by fault displacement are the main reasons for bridge structure failure;(3)Different types of faults lead to significantly distinct soil pressure distributions,reflecting the complex effects of fault movements on the surrounding soil;(4)The inherent characteristics of the bridge structure,such as bearing constraint conditions and girder connection states,have important influences on its ability to resist fault displacement.The research results provide theoretical references for the seismic and fault-resistant design of bridges crossing faults.关键词
断层错动/跨断层桥梁/破坏特征/缩尺模型试验/土-结构相互作用Key words
fault displacement/bridge crossing fault/failure characteristic/scaled model test/soil-structure interaction分类
交通工程引用本文复制引用
徐龙军,陈睿致,刘秒,靳超越,刘佳乐,谢礼立..跨断层简支梁桥在蠕滑断层作用下破坏特征与土压力变化研究[J].岩土工程学报,2026,48(4):730-739,10.基金项目
国家自然科学基金重点项目(U2139207) （U2139207）
湖北省自然科学基金(创新群体)重点项目(2023AFA030)This work was supported by Key Program of National Natural Science Foundation of China(Grant No.U2139207)and Key Program of Hubei Provincial Natural Science Foundation(Innovation Group)(Grant No.2023AFA030). （创新群体）
