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行波效应对大跨多塔悬索桥地震反应的影响分析

Effect of Seismic Wave Passage on Seismic Response of Long-span Multi-tower Suspension Bridges

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【作者】 邓育林何雄君

【Author】 Deng Yulin He Xiongjun (School of Transportation,Wuhan University of Technology,Wuhan 430063,China)

【机构】 武汉理工大学交通学院

【摘要】 以一座大跨3塔悬索桥为工程背景,采用时程分析法分析了行波效应对大跨多塔悬索桥地震反应的影响,比较了行波作用下不同结构体系地震反应的变化规律.研究结果表明:行波效应可能会使边塔的地震反应有较大增长,但对中塔的地震反应影响不大;行波效应对边、中塔基础及梁端位移的反应影响不大;结构体系的变化对行波效应有一定影响,当中塔由沉井基础变为桩基础时,行波效应对边塔的地震反应影响增大;而当中塔与主梁之间设置弹性索,中塔由桩基础变为沉井基础时,行波效应对中塔的地震反应影响增大.

【Abstract】 Based on a realistic engineering project of a long-span multi-tower suspension bridge,the seismic response under seismic wave passage is analyzed.And the effect of different longitudinal connections between the middle-tower and the girder,and distinct foundations of the middle-tower on seismic wave passage effect was studied.The results indicate that seismic wave passage can amplify the seismic demand of side-towers,but has minor effects on seismic demand of middle-tower.It also has minor effects on seismic demand of foundations and the displacement of main grider.The effect of seismic wave passage on seismic demand of side-towers increments as the piles foundation of middle-tower substitute for caisson.But the effect of seismic wave passage on seismic demand of middle-towers increases as the caisson foundation of middle-tower substitute for foundation with longitudinal elasticity spring between the main-tower and the main girder.

【基金】 中央高校基本科研业务费专项资金资助(批准号:2010-VI-013)
  • 【文献出处】 武汉理工大学学报(交通科学与工程版) ,Journal of Wuhan University of Technology(Transportation Science & Engineering) , 编辑部邮箱 ,2011年03期
  • 【分类号】U441.3
  • 【被引频次】9
  • 【下载频次】148
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