摘要
连续梁桥是一种在公路和铁路交通中经常使用的桥梁结构类型。针对一跨度为636m的连续梁桥,采用谱表现方法合成非平稳地震动,以有限元模拟为基础,分析了地震动空间变化效应对桥梁地震易损性的影响。研究发现,非一致激励下主梁内力增大,但桥墩的变形响应小于一致激励的情况,考虑地震动空间变化效应会降低连续梁桥的地震易损性。
Continuous beam bridge is an important kind of bridge structures which is widely used in highway and railway transportation.In this paper,the study focused on the seismic fragility analysis of a continuous beam bridge which is 636 m long.The earthquake ground motions were generated by the spectral representation method.Based on the finite element simulation,the effect of the spatial variation of seismic ground motions on the fragility of the bridge were analyzed.It can be found that the internal force of main beam increases under non-uniform excitation.However,the deformation of the pier under non-uniform excitation is less than that under uniform excitation,and the earthquake vulnerability of the bridge is reduced.
作者
王鼎
刘航
刘汉昆
WANG Ding;LIU Hang;LIU Hankun(Key Laboratory of Green Construction and Intelligent Maintenance for Civil Engineering of Hebei Province,Qinhuangdao 066004,China;School of Civil Engineering and Mechanics,Yanshan University,Qinhuangdao 066004,China;Beijing Shougang International Engineering Technology Co.,Ltd.,Beijing 100043,China;Sichuan Institute of Building Research,Chengdu 610081,China)
出处
《四川建筑科学研究》
2022年第3期1-9,共9页
Sichuan Building Science
基金
河北省自然科学基金(E2020203103)
河北省高等学校科学技术研究项目青年拔尖人才项目(BJ2019030)。
关键词
连续梁桥
地震易损性
非一致激励
数值模拟
continuous beam bridge
seismic fragility
non-uniform excitation
numerical simulation
