单层穹顶网壳的荷载-位移全过程及缺陷分析  

Complete Load-Deflection Response and Imperfection Analysis of Single-Layer Lattice Dome

作　　者：陈昕[1] 沈世钊[1] 

机构地区：[1]哈尔滨建筑工程学院

出　　处：《建筑结构学报》1992年第3期11-18,共8页Journal of Building Structures

基　　金：建设部科技发展基金

摘　　要：本文以一个50m跨度的单层穹顶网壳为例进行了荷载-位移全过程分析。研究了该结构作为理想壳的非线性稳定性能,以及加荷过程中若干次屈曲后的结构位移形态。单层穹顶网壳对初始缺陷极为敏感,而实际结构不可避免存在初始安装偏差,但国内针对有缺陷网壳的稳定问题研究很少。本文在这方面做了探索,提出两种缺陷分析方法,并论证了这些方法用于实际工程的可行性。Taking a single-layer lattice dome with 50m span as an example, the whole process of its load-deflection response has been analyzed in this paper. The non-linear behavior of a perfect dome and its deflection shapes at several points after buckling during loading process are at first investigated. Single-layer lattice dome is very sensitive to initial imperfections which are quite unavoidable in real structures. Yet little work has been done on the stability analysis of imperfect lattice shell either at home or abroad. In this paper, two methods for imperfection analysis are suggested. It has been proved that these methods can be applied to actual engineering projects.

关 键 词：穹顶网壳 屈曲 荷载 位移 

分 类 号：TU330.2[建筑科学—结构工程]