深圳大学学报（理工版）2007，Vol.24Issue(3)：228-233,6.
大跨度连续刚架拱桥的地震响应研究
Seismic response of long span continuous rigid-frame arch bridge
摘要
Abstract
This paper investigates the spatial variability effects of ground motion on the seismic response of long-span continuous rigid-frame arch bridge.The analyses are performed on the Xinguang bridge in Guangzhou,which is the worldwide first 3-span continuous rigid-frame and steel-truss arch bridge with reinforced concrete V-shaped rigid frame.Its spans of the main bridge are as long as(177+428+177)m.The spatial variability of ground motions between pivots of the bridge is taken into account with multi-support excitation and traveling wave effect by exciting the bridge in both transverse and longitudinal directions of the bridge.New study shows the characteristics of seismic response of the critical bridge members are varied with different seismic excitations.The spatially varying ground motion has a considerable influence on the seismic responses of the ribs of the main arch and V-shaped rigid frame,whereas the influence on the side arch ribs is insignificantly predominant.As the shear wave velocity increases the peak longitudinal displacement of the crown of the main arch relative to the arch springing decreases,while,the effect of shear wave velocity on the longitudinal displacement of the ribs of the side arch can be neglected.关键词
拱桥/连续刚架拱桥/地震响应/地面空间变化/多点激励/行波效应/有限元Key words
arch bridge/continuous rigid-frame arch bridge/seismic response/spatially varying ground motion/multi-support excitation/traveling wave effect/finite element method分类
交通工程引用本文复制引用
刘爱荣,禹奇才,张俊平..大跨度连续刚架拱桥的地震响应研究[J].深圳大学学报（理工版）,2007,24(3):228-233,6.基金项目
广东省科技计划资助项目(2005B10201023) （2005B10201023）
广州市科技计划资助项目(2006J1-C0471) （2006J1-C0471）
广州市建设科技资助项目(2004047) （2004047）
