多维地震动作用下曲线连续桥梁地震易损性研究  

RESEARCH ON SEISMIC VULNERABILITY OF CURVED CONTINUOUS BRIDGES UNDER MULTI-DIMENSIONAL GROUND MOTION

作　　者：吴慎其 王德斌 李新 王世鹏 WU Shenqi;WANG Debin;LI Xin;WANG Shipeng(School of Civil Engineering,Dalian Jiaotong University,Liaoning Dalian 116028,China)

机构地区：[1]大连交通大学土木工程学院,辽宁大连116028

出　　处：《低温建筑技术》2020年第3期37-41,共5页Low Temperature Architecture Technology

基　　金：国家自然科学基金项目(51408093);辽宁省自然科学基金项目(20170540134);大连理工大学海岸和近海工程国家重点实验室基金项目(LP1617);辽宁省教育厅科学研究一般项目(L2015098)。

摘　　要：基于OpenSees有限元平台建立三类曲线连续梁桥,对算例桥梁进行三向平动地震动作用下的增量动力分析,并采用概率性地震需求分析方法绘制三类曲线连续桥梁关键构件的地震易损性曲线。结果表明在地震作用下,曲率半径小的单弯曲线连续梁桥比曲率半径大的单弯曲线连续梁桥损伤概率稍大;S型曲线连续梁桥相对于单弯曲线连续梁桥在桥墩横桥向损伤概率更大,且在多遇地震地震动加速度峰值(PGA=0.2g)以内,支座损伤概率较大。Based on OpenSees the finite element platform, three types of curved continuous beam bridges were built. The incremental dynamic analysis of the bridge under the three-way translational ground motion was performed on the example bridge, and the probabilistic seismic demand analysis method was used to draw the seismic susceptibility of key components of the three types of curved continuous bridges damage curve. The results show that under the earthquakes, the single-curved continuous beam bridge with a small radius of curvature has a slightly higher probability of damage than the single-curved continuous beam bridge with a large radius of curvature,meanwhile, the damage probability of the transverse bridge is greater within the peak earthquake ground acceleration(PGA=0.2 g).

关 键 词：曲线连续梁桥 地震响应 易损性曲线 数值分析 

分 类 号：TU311.3[建筑科学—结构工程]