小半径匝道曲线梁桥地震响应分析  

Seismic response analysis of a small- radius curved girder bridge

作　　者：王阳春[1] 徐秀丽[1] 李雪红[1] 李枝军[1] 

机构地区：[1]南京工业大学土木工程学院,江苏南京210009

出　　处：《世界地震工程》2014年第1期154-159,共6页World Earthquake Engineering

基　　金：江苏省自然科学基金资助项目(BK2011803)

摘　　要：针对小半径匝道曲线梁桥的桥窄、墩矮、弯扭耦合严重、地震危害明显等特点,结合某城市一座3跨连续小半径匝道曲线梁桥的工程实例,比较了单梁模型、梁格模型和实体模型在模拟小半径曲线梁桥时的精度。基于线性时程分析方法,分析了地震波输入方式、墩梁约束形式、宽度和跨径的改变对小半径匝道曲线梁桥地震响应的影响。结果表明:梁格模型较为适合于模拟小半径匝道曲线梁桥;地震波输入方式、约束形式以及宽跨的改变对小半径匝道曲线梁桥的地震响应有较大影响。In view of the feature of small-radius curved girder bridge such as small width, lower pier, severe ben- ding-torsion coupling and noticeable seismic damage, and taking a small-radius curved ginder bridge of three spans in some city as an engineering case, the accuracy of the single-beam model, the grillage model and the solid model in simulating small-radius girder bridge was compared. Based on the linear time history analysis method, the influ- ence of the seismic wave input mode, the pier beam constraint form and the change of width and span on the seismic response of small-radius curved girder bridge was analyzed. The results show that the grillage model is move suitable to simulating the small-radius curved girder bridge, the seismic wave input mode, the peir beam constraint form and the change of the width/span of the bridge have more obvious influence on seismic response of the bridge.

关 键 词：小半径曲线梁桥 时程分析方法 地震响应 

分 类 号：U442.55[建筑科学—桥梁与隧道工程]