大跨度斜拉立体桁架结构的竖向地震作用研究  

Investigation of Vertical Seismic Responses of Long Span Cable-stayed Space Truss

作　　者：孙建琴[1] 李从林[1] 

机构地区：[1]兰州交通大学,730070

出　　处：《特种结构》2011年第2期60-65,共6页Special Structures

基　　金：兰州交通大学"青兰"人才工程基金资助计划资助(QL-08-05A)

摘　　要：本文采用梁单元、杆单元和索单元的混合有限元模型,对大跨度斜拉立体桁架进行了动力分析。首先,研究了结构的自振特性;然后,采用振型分解反应谱法和时程分析法分析了在竖向地震作用下,大跨度斜拉立体桁架内力系数的大小和分布规律,给出了竖向地震作用系数表,供工程设计人员参考。Mixed finite element method of spatial beam,rod and cable elments is applied to analyze the dynamic properties of long span cable-stayed space truss in this paper.Firstly free vibration behavior is conducted.Then the magnitude and distribution of vertical seismic internal force coefficient are studied by using response spectrum method and time history method under vertical earthquake.The table for vertical seismic internal force coefficient was given and could offer reference for design engineers.

关 键 词：大跨度 斜拉立体桁架 反应谱法 时程分析法 地震内力系数 

分 类 号：TU399[建筑科学—结构工程] TU311.3