大跨空间网格结构在多维多点输入下的地震响应分析  

Seismic response analysis of long-span space lattice structures under multi-dimensional and multi-support excitation

作　　者：白学丽[1] 叶继红[2] 

机构地区：[1]东南大学土木工程学院,江苏南京210096 [2]东南大学混凝土与预应力混凝土结构教育部重点实验室,江苏南京210096

出　　处：《铁道科学与工程学报》2005年第2期38-45,共8页Journal of Railway Science and Engineering

基　　金：国家自然科学基金资助项目(50108003)

摘　　要：同时考虑地震动2个水平和1个竖直共3个平动分量,并考虑了地震动场的空间相关性,用时程分析法对大跨空间结构进行了多维多点输入和多维一致输入下的响应分析。考查了2种输入方法下结构杆件内力的分布特点,并对其进行了对比分析,在多维多点输入和多维一致输入下结构响应的差异、视波速及结构跨度对这种差异的影响方面得出了一些结论。In this paper, the dynamic behavior of long-span space lattice structures subjected to multi-dimensional and multi-support excitation, as well as to multi-dimensional and simple-support excitation are thoroughly analyzed based upon time history method. The characteristic of the distribution of element forces under these two kinds of earthquake motions is studied and some differences are reached. Furthermore, the effects of the structural span and the apparent wave velocity on these differences are also suggested.

关 键 词：多点输入 地震响应分析 空间网格结构 多维 大跨空间结构 空间相关性 时程分析法 地震动场 分布特点 杆件内力 输入方法 对比分析 结构响应 结构跨度 视波速 

分 类 号：TU352.11[建筑科学—结构工程] TV312[水利工程—水工结构工程]