地震作用下弦支穹顶结构动力稳定性参数分析

英文篇名：Parametric study of dynamic stability of suspend domes under earthquake
中文刊名：空间结构
英文刊名：Spatial Structures
作者：王秀丽 ; 孙晓骥 ; 赵玉慧
英文作者：WANG Xiu-li1 ; SUN Xiao-ji1 ; ZHAO Yu-hui2(1.School of Civil Engineering ; Lanzhou University of Technology ; Lanzhou 730050 ; China)(2.School of Civil Engineering ; Xi'an University of Architecture & Technology ; Xi'an 710055 ; China)
中文关键词：弦支穹顶 ; 动力稳定性 ; 地震作用 ; 预应力 ; 参数分析
英文关键词：suspend dome ; dynamic stability ; earthquake excitation ; pre-stress ; parametric analysis
出版日期：2008-09-15
机构：兰州理工大学土木工程学院;西安建筑科技大学土木工程学院;
年：2008
期：03
出版单位：空间结构

摘要

弦支穹顶结构是一种新型结构体系,它综合了单层网壳结构和索穹顶结构各自的优点.为全面认识弦支穹顶结构在地震作用下的动力稳定性问题,本文以具有实际工程意义的50m跨度凯威特型弦支穹顶结构作为研究对象,系统分析了多种因素对弦支穹顶结构动力稳定性临界荷载的影响,其中包括:不同支座条件、不同矢跨比和不同杆件截面、不同拉索布置层数、不同拉索预应力值以及不同地震输入.本文成果为弦支穹顶结构的工程应用提供有价值的参考.
As a new type of structural form,the suspend dome structure combines both benefits of the single layer reticulated shell structure and the cable-dome structure.To investigate the dynamic stability behavior of the suspend dome structure under earthquake excitation,suspend domes with a span of 50 m are taken as examples and a comprehensive numerical analysis on dynamic stability behavior of some proto-type suspend domes is carried out with the following primary parameters: boundary conditions,rise-to-span ratios,pre-stress value of the cables,number of cable rings and different earthquake action.Some valuable conclusions are drawn for practical design.

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