地震作用下大跨度斜拉桥和引桥间碰撞分析

PDF(1809 KB)

振动与冲击 ›› 2010, Vol. 29 ›› Issue (3) : 95-99.

论文

地震作用下大跨度斜拉桥和引桥间碰撞分析

王斌斌 ; 叶爱君

作者信息 +

Pounding effects of long- span cabled-stayed bridge and bridges approach under earthquake

WANG binbin ; YE aijun

Author information +

文章历史 +

摘要

强烈地震作用下大跨度斜拉桥和引桥(一般是简支梁桥或多跨连续梁桥)的纵向振动是耦合的，可能发生碰撞及落梁。采用非线性时程地震反应方法分析了梁端的纵向碰撞效应对体系整体反应的影响，其中对碰撞接触单元的刚度进行了比较分析，然后分别讨论了影响碰撞的几种因素，主要是伸缩缝初始间隙大小、相邻结构周期比等的影响。结果表明碰撞对引桥影响相对较大。

Abstract

Vibrations of long-span cable-stayed bridges and their approach bridges are usually coupled under severe earthquake excitations. Longitudinal coupling motion may cause pounding or even falling down of main girders. The analysis is conducted on a model for a cable-stayed bridge. The pounding effects at the movement joints are discussed and the influences of different impact stiffness are evaluated. The effects of some parameters including period ratio of adjacent bridge segments and initial gap size at expansion joints are investigated. The results show that pounding effects of bridges approach are greater.

导出引用

王斌斌 ;叶爱君. 地震作用下大跨度斜拉桥和引桥间碰撞分析[J]. 振动与冲击, 2010, 29(3): 95-99

WANG binbin; YE aijun. Pounding effects of long- span cabled-stayed bridge and bridges approach under earthquake[J]. Journal of Vibration and Shock, 2010, 29(3): 95-99

中图分类号： U442.5+5