强降雨作用下具有初始凹陷的充气膜结构袋状效应研究  

Analysis of bagging effect in air-supported membrane structures with initial imperfections under intensive rainfall

作　　者：张影 袁行飞[1] 徐晓红 ZHANG Ying;YUAN Xing-fei;XU Xiao-hong(Space Structures Research Center,Zhejiang University,Hangzhou 310058,China;The Architectural Design &Research Institutes of Zhejiang University,Hangzhou 310028,China)

机构地区：[1]浙江大学空间结构研究中心,浙江杭州310058 [2]浙江大学建筑设计研究院,浙江杭州310028

出　　处：《空间结构》2018年第4期49-55,61,共8页Spatial Structures

基　　金：国家自然科学基金项目(51278461,51578492);浙江省自然科学基金项目(LZ14E080001)

摘　　要：采用向量式有限元法对强降雨作用下具有初始缺陷的充气膜结构的袋状效应进行了研究.探讨了基于向量式有限元的膜单元内力公式、膜结构初始缺陷施加方式、强降雨模拟方法以及膜结构破坏准则等问题,提出了强降雨作用下膜结构袋状效应研究的基本假定和积水荷载计算方法,建立了膜结构袋状效应分析流程.最后通过编写MATLAB程序,对一正方形充气膜结构在强降雨作用下从袋状效应形成直至结构破坏的全过程进行模拟,验证,了本文方法的正确性和有效性.Based on the theory of vector form intrinsic finite element(VFIFE),the bagging effect in airsupported membrane structures with initial imperfections under intensive rainfall is studied in this paper.The internal force formulas of VFIFE membrane element,the way to impose initial imperfections,the simulation of intensive rainfall and the failure criterion of membrane structures are discussed.Basic assumptions for studying the bagging effect of membrane structures under intensive rainfall and calculation methods for the ponding load are proposed.Then the analysis process of the bagging effect in membrane structures is presented.Finally,the whole process of a square air-supported membrane structure from the occurrence of bagging effect to the structural failure under intensive rainfall is simulated by MATLAB program,and the result shows that the proposed method is correct and effective.

关 键 词：充气膜结构 向量式有限元 强降雨 袋状效应 

分 类 号：TU353[建筑科学—结构工程]