锚栓限位与邻梁碰撞对曲线桥梁抗震性能的影响

焦驰宇1,3,肖翔1,龙佩恒2,,徐艳3,侯苏伟2,张羽1

振动与冲击 ›› 2016, Vol. 35 ›› Issue (23) : 121-129.

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振动与冲击 ›› 2016, Vol. 35 ›› Issue (23) : 121-129.
论文

锚栓限位与邻梁碰撞对曲线桥梁抗震性能的影响

  • 焦驰宇1,3,肖翔1,龙佩恒2,,徐艳3,侯苏伟2,张羽1
作者信息 +

Influence of Displacement Limitation of Anchor Bolt and Adjacent Beam Collision on Seismic Performance of Curved Bridge

  • JIAO Chi-yu 1,3 XIAO Xiang 1 LONG Pei-heng 2,  XU Yan 3 HOU Su-wei 2 ZHANG Yu 1
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文章历史 +

摘要

曲线桥梁在地震作用下梁体之间会发生非均匀碰撞,可能造成前梁落梁或后梁局部破坏现象。而在纵向设置抗震锚栓可有效防止落梁,也可对相邻梁的碰撞起到一定缓解作用。但目前国内外还缺乏锚栓对曲线桥梁的抗震性能影响的相关研究。本文以某四跨曲线桥为背景工程,建立了空间有限元模型,并分别用滞后系统、钩单元、接触单元模拟了支座损伤、锚栓约束、相邻梁纵向碰撞等物理现象,利用非线性时程分析法,本文进行了三种工况(①无锚栓、不计碰撞,②无锚栓、计碰撞,③有锚栓,计碰撞)曲线桥梁的墩梁相对位移、墩底内力、相邻梁碰撞力等关键地震响应对比研究。研究表明:相邻梁的非均匀碰撞是曲线桥梁必须考虑的关键因素;而设置抗震锚栓能缓解曲线桥梁的碰撞效应,对减轻震害具有一定的作用。

Abstract

Non-uniform collision what happened between the girders of curved bridges under seismic action, would cause girder falling of front beam or local damage phenomenon of back beam. Set seismic anchor bolt in the longitudinal which can effectively prevent girder falling , may also make a mitigative effect for structure collision. Taking a curved bridge as an example, this paper established the spatial finite element model, And delay system, hook element, contact element was used to simulate the bearing damage, anchor bolt constraints, adjacent beam longitudinal collision. Through nonlinear time history analysis method, this paper carries on the comparative study that relative displacement between pier and beam, the internal force of pier bottom and the adjacent beam collision force of the three conditions (1 no anchor bolt and regardless of the collision, 2 no anchor bolt and collision, 3 with anchor bolt and collision ). The research shows that: the adjacent beam non-uniform collision is the key factor that must be considered in curved bridge. Set the seismic anchor bolt can alleviate the collision effect of curved bridge, and has a significant effect on reducing seismic damage.

关键词

曲线桥梁 / 相邻联碰撞 / 抗震锚栓 / 抗震性能

Key words

curved bridge / adjacent beam collision / seismic anchor bolt / seismic performance

引用本文

导出引用
焦驰宇1,3,肖翔1,龙佩恒2,,徐艳3,侯苏伟2,张羽1. 锚栓限位与邻梁碰撞对曲线桥梁抗震性能的影响[J]. 振动与冲击, 2016, 35(23): 121-129
JIAO Chi-yu 1,3 XIAO Xiang 1 LONG Pei-heng 2, XU Yan 3 HOU Su-wei 2 ZHANG Yu 1. Influence of Displacement Limitation of Anchor Bolt and Adjacent Beam Collision on Seismic Performance of Curved Bridge[J]. Journal of Vibration and Shock, 2016, 35(23): 121-129

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