某天桥顶部组合拱架结构的地震响应分析

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英文篇名：Earthquake Response Analysis of Arch Structure at top of A Platform Bridge 中文刊名：科学之友(B版) 英文刊名：Friend of Science Amateurs 作者：李海旺 ; 宋晓峰 英文作者：Li Haiwang ; Song Xiaofeng 中文关键词：组合拱桁架 ; 有限元分析 ; 地震响应 英文关键词：arch truss unit ; finite element analysis ; earthquake response 出版日期：2008-11-10 机构：太原理工大学; 年：2008 期：11 出版单位：科学之友(B版)

摘要

文章以某景观过街天桥的造型部分——61m跨度组合拱架为研究对象,建立空间计算模型,并应用ANSYS有限元程序对该桁架的自振特性及谱响应进行了分析。结果表明:结构的自振以整体平动为主;结构的地震响应沿X—Z平面对称,并以弯矩为主;结构在地震作用沿X轴方向输入时的响应最大;主拱交点处的截面最薄弱。
Focusing on 61m-span arch truss unit——the form part of the across- street platform bridge in a landscape--as a re-search object, space calculation model is established and vibration characteristics and spectral response of the truss is analyzed by AN- SYS finite element program. The results show that: the vibration of structure is mainly level moving as a whole; earthquake response of structure is symmetrical along X- Z plane and is mainly the moment; earthquake response of the structure is the strongest along the X axis and the weakest at the cross- section of the intersection of the main arch.

引文