Longitudinal Seismic Response and Parameter Influence Analysis for Multi-span Simply Supported Girder Bridge with Unconventional Configurations

孙广俊; 李鸿晶; 赵鹏飞; 肖琨

doi:10.13409/j.cnki.jdpme.2013.04.012

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Longitudinal Seismic Response and Parameter Influence Analysis for Multi-span Simply Supported Girder Bridge with Unconventional Configurations

更新时间：2025-12-11

- Longitudinal Seismic Response and Parameter Influence Analysis for Multi-span Simply Supported Girder Bridge with Unconventional Configurations
- Vol. 33, Issue 4, Pages: 441-448(2013)
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- DOI：10.13409/j.cnki.jdpme.2013.04.012
  CLC： 448.2
- Published：2013
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[1]孙广俊,李鸿晶,赵鹏飞,肖琨.非规则多跨简支梁桥纵向地震反应及参数影响分析[J].防灾减灾工程学报,2013,33(04):441-448.

孙广俊, 李鸿晶, 赵鹏飞, et al. Longitudinal Seismic Response and Parameter Influence Analysis for Multi-span Simply Supported Girder Bridge with Unconventional Configurations[J]. 2013, 33(4): 441-448.
[1]孙广俊,李鸿晶,赵鹏飞,肖琨.非规则多跨简支梁桥纵向地震反应及参数影响分析[J].防灾减灾工程学报,2013,33(04):441-448. DOI： 10.13409/j.cnki.jdpme.2013.04.012.

孙广俊, 李鸿晶, 赵鹏飞, et al. Longitudinal Seismic Response and Parameter Influence Analysis for Multi-span Simply Supported Girder Bridge with Unconventional Configurations[J]. 2013, 33(4): 441-448. DOI： 10.13409/j.cnki.jdpme.2013.04.012.

摘要

考虑支座非线性和桥墩弹塑性的影响

建立了不等墩高5跨非规则简支梁桥的有限元模型。采用非线性时程分析方法计算了不同地震波输入下多跨简支梁桥的纵向地震反应

研究了非规则多跨简支梁桥邻跨刚度比及上部结构间相互碰撞效应对桥梁纵向地震位移反应和内力反应的影响规律。研究表明

邻跨刚度比对非规则多跨简支梁桥的桥墩剪力、墩底弯矩、墩顶位移、梁体位移、墩梁间相对位移及主梁间相对位移有着显著的影响

并且邻跨刚度相差越大

影响越为显著

更容易使上部梁体发生落梁破坏;考虑桥梁上部结构碰撞效应时

邻跨比对桥梁结构反应的影响受地震波的影响较大

碰撞未必加剧落梁破坏。

Abstract

Considering the nonlinear behavior of bearings and elastic-plastic behavior of piers

the finite element model of a five-span simply supported girder bridge with unequal pier height is established.The longitudinal seismic responses of bridge due to different seismic waves are calculated by using a nonlinear time-history analysis method.The parameter influence of stiffness ratio of the adjacent span and collision of superstructure on longitudinal seismic displacement and internal force responses of simply supported girder bridge with unconventional configurations is researched respectively.The research shows that stiffness ratio of adjacent span has significant influence on the pier shear force

pier bending moment

top displacement of pier

girder displacement

relative displacement between pier and girder

and relative displacement between girders.With the increase of the difference of dynamic characteristic between adjacent spans

the influence of the adjacent span stiffness ratio on bridge response is more significant and bridge is easy to be unseating failure.Considering the collision effect

the effect of the stiffness ratio of adjacent span on bridge response depends on seismic wave and the collision between girders does not always aggravate the unseating failure.

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references

非规则梁桥纵向地震反应及碰撞效应 [J]. 李建中,范立础. 土木工程学报 . 2005(01)

基于直杆共轴碰撞理论的桥梁地震反应邻梁碰撞分析模型 [J]. 王东升,冯启民,王国新. 工程力学 . 2004(02)

桥梁结构地震响应与抗震性能分析[M]. 中国建筑工业出版社 , 柳春光, 2009

桥梁结构地震响应分析与抗震设计[M]. 人民交通出版社 , 谢旭编著, 2006

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