汶川地震回澜立交桥震害成因分析

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振动与冲击 ›› 2014, Vol. 33 ›› Issue (12) : 99-105.

论文

汶川地震回澜立交桥震害成因分析

孟杰1 刘钊2 张建东3

作者信息 +

Seismic Failure Analysis of Huilan Flyover in Wenchuan Earthquake

MENG Jie1, LIU Zhao2 ZHANG Jian Dong3

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文章历史 +

摘要

绵竹市回澜立交桥为典型的小曲率半径梁桥，在汶川地震中该桥桥墩普遍出现塑性铰压溃破坏。基于对回澜立交匝道桥的震害情况调查，建立桥梁三维动力数值模型，进行了动力特性及动力时程分析，在时程分析中考虑了材料弹塑性、边界碰撞效应以及支座滑移效应等关键非线性因素，并研究了各因素对桥梁地震动响应的影响，最后，基于定性与定量分析的结论，得到了回澜立交匝道桥的震害成因。

Abstract

The devastating Wenchuan earthquake caused substantial flexural failure to Huilan flyover, located in Mianzhu of Sichuan, China. Based on the investigation of bridge damage, three-dimensional mathematical models suitable for eigenvalue analysis and non-linear time-history dynamic analysis are presented. In nonlinear time-history analysis, elasto-plastic mathematical model, effect of pounding and effect of slippage of bearing are studied by sensitivity analysis. Finally, based the conclusion of qualitative and quantitative analysis, the causations of seismic failure are discussed.

导出引用

孟杰刘钊张建东. 汶川地震回澜立交桥震害成因分析[J]. 振动与冲击, 2014, 33(12): 99-105

MENG Jie;LIU Zhao ZHANG Jian Dong. Seismic Failure Analysis of Huilan Flyover in Wenchuan Earthquake[J]. Journal of Vibration and Shock, 2014, 33(12): 99-105