大型高架桥横向地震反应分析  

Lateral seismic response analysis of large-scale elevated line bridge

作　　者：陈淮[1] 朱文正[2] 

机构地区：[1]郑州大学土木工程学院,河南郑州450002 [2]长安大学公路学院,陕西西安710064

出　　处：《世界地震工程》2002年第3期80-84,共5页World Earthquake Engineering

基　　金：河南省自然科学基金资助项目(004040100)

摘　　要：提出了大型高架桥梯形截面薄壁箱梁地震反应分析模型,该模型可以考虑箱梁弯曲、扭转、畸变等多种因素,还能考虑箱梁结构的横向弯扭耦合振动等结构自身特性和桥墩变形、盆式橡胶支座等局部构件作用,建立了大型高架桥在地震波输入下的动力方程,计算了郑州紫荆山高架桥分别在4种典型地震波作用下的地震时程反应,计算给出了该桥的地震反应规律,论证了郑州紫荆山高架桥在地震作用下横向变形的可靠性,为该桥的抗震设计提供参考。This paper presents a seismic response analysis model of the large-scale elevated line box girder bridge with trapezoidal section. Several factors such as the bending, torsion, distortion of box girder, structural characteristic of traversal bending-torsion vibration and deformation of pot type rubber bearing are considered. Lateral vibration equation of the large-scale elevated line bridge subjected to seismic excitation is derived. The seismic responses of Zijinshan elevated line bridge subjected to 4 typical earthquake wave input are calculated. The maximal displacement of every controlled point is obtained. The trend of seismic response of the large-scale elevated line bridge is given out. The seismic reliability of Zijinshan elevated line bridge is studied. The results can be used as reference to the seismic design of urban highway bridge with thin walled box girder.

关 键 词：高架桥 箱梁 地震反应 模型 弯曲 扭转 抗震设计 

分 类 号：U442.55[建筑科学—桥梁与隧道工程]