行波效应对大跨度多塔斜拉桥地震反应影响  

Influence of travelling-wave effect on seismic response of a long-span multi-tower cable stayed bridge

作　　者：方圆[1] 李建中[1] 彭天波[1] 邓育林 

机构地区：[1]同济大学土木工程防灾国家重点实验室,上海200092 [2]江西省高等级公路管理局,南昌330046

出　　处：《振动与冲击》2010年第10期148-152,235,共6页Journal of Vibration and Shock

基　　金：国家自然科学基金资助项目(50578118)

摘　　要：结合一座大跨多塔斜拉桥工程设计实例,采用动态时程分析方法,对比研究了桥塔、主梁之间纵向固定以及纵向活动两种约束方式下,行波效应对各自结构体系纵向地震反应的影响。分析表明:对于多塔斜拉桥,行波效应对结构各桥塔塔底内力,以及各联梁端、各桥塔塔顶位移响应的影响不同。对于不同桥塔、主梁纵向约束体系的多塔斜拉桥,行波效应对其地震响应的影响程度也不同;塔、梁纵向固定的情况下,行波效应的影响较大,反之,塔、梁纵向活动的情况下,行波效应的影响较小。Based on an engineering design case of a multi-tower cable stayed bridge,influence of travelling-wave effect on seismic response of the multi-tower cable stayed bridge with different constraint manners between tower and beam was discussed by means of dynamic response history analysis.The results indicated that influences of travelling-wave effect on seismic response of bending moment and shearing force at the bottom of each tower are different,displacement on the top of each tower and displacement of each beam unite are also different;the influence of travelling-wave effect on seismic response of multi-tower cable stayed bridges with different constraint manners between tower and beam is different,too;the influence is relatively big when longitudinal constraint between tower and beam is locked;on the contrary,the influence is relatively small when longitudinal constraint between tower and beam is free.

关 键 词：多塔斜拉桥 行波效应 地震反应 

分 类 号：U442.5[建筑科学—桥梁与隧道工程]