斜拉桥不同有限元模型的地震反应谱对比分析

详细信息 本馆镜像全文    |  推荐本文 | | 获取馆网全文

英文篇名：Seismic Response Spectrum Research of Different Cable-stayed Bridge FE Models 中文刊名：北方交通 英文刊名：Northern Communications 作者：张宏斌 英文作者：ZHANG Hong-bin 中文关键词：ANSYS ; 斜拉桥 ; 有限元模拟 ; 地震反应 英文关键词：ANSYS ; Cable stayed bridge ; Finite element mode ; Seismic response 出版日期：2011-01-28 机构：大连理工大学; 年：2011 期：01 出版单位：北方交通

摘要

以一座斜拉桥为例,应用ANSYS程序建立了三种不同空间有限元模型:脊梁模型、三主梁模型和板壳模型。对三个模型分别进行了地震反应谱分析,通过结果对比,可以得到:单主梁模型可以用来模拟闭口箱梁;三主梁模型因为充分考虑了截面的翘曲扭转刚度,可以用来模拟翘曲刚度较大的开口箱梁截面,并具有比较高的精度;板壳模型建模比较繁琐,可以用做模拟板壳局部应力分析。
Based on a cable-stayed bridge,three different special FE models are constructed by ANYS program,which are single-gird model,triple-gird model and shell model.After that,APDL Parametric Design Language that is offered by ANSYS program inputs the earthquake response spectrum to every FE model.Every model is impulsed by two rules seismic response spectrum come from vertical,transversal or horizontal direction in space.The mainly conclusion can be acquired through the seismic response calculation: the single-gird model can be used to model close-box section beam and the triple-gird model to model open-box section beam because of counting the warp torsion stiffness efficiently,which model own more precision than single-gird model;the shell model should be used model shell or thin wall structures.

引文

[1]范立础.桥梁抗震[M].上海:同济大学出版社,1996.
    [2]ANSYS基本过程手册[Z].美国ANSYS公司北京办事处,1996.
    [3]项海帆,朱乐东.考虑约束扭转刚度影响的斜拉桥动力分析模型[A].全国桥梁结构学术大会论文集[C].上海:同济大学出版社,2002:1039-1045.