考虑蒙皮效应的门式刚架结构风振响应分析  

WIND-INDUCED RESPONSE ANALYSIS OF STEEL PORTAL FRAME CONSIDERING DIAPHRAGM EFFECT

作　　者：李烨 殷小珠[2] 吴银飞[1] 朱召泉[1] 邱冶[1] LI Ye;YIN Xiaozhu;WU Yinfei;ZHU Zhaoquan;QIU Ye(College of Civil and Transportation Engineering, Hohai University, Nanjing 210098, China;Central Research Institute of Building and Construction Co. Ltd, MCC Group, Beijing 100088, China)

机构地区：[1]河海大学土木与交通学院,南京210098 [2]中冶建筑研究总院有限公司,北京100088

出　　处：《钢结构》2018年第4期67-70,66,共5页Steel Construction

基　　金：江苏省自然科学基金项目(BK20170880)

摘　　要：为研究风荷载作用下围护结构的蒙皮效应对门式刚架结构力学性能的影响,通过ANSYS软件建立门式刚架不考虑蒙皮效应的空间骨架模型以及考虑蒙皮效应的整体有限元模型,利用东京工艺大学低矮建筑气动数据库中的相关风洞试验数据,进行动力时程计算,分析结构的风振响应。结果表明:蒙皮作用可以较大地提高结构的自振频率,减小结构的自振周期。侧向风荷载作用下,刚架的侧向位移风振响应降低,除背风面梁柱连接处节点应力响应有所增加外,其余部位的应力均减小。In order to study portal frame＇s mechanical properties considering diaphragm effect under wind load,the paper established space portal frame model without considering diaphragm effect and whole finite element model under consideration of diaphragm effect using finite element software ANSYS based on the low-building wind tunnel test database of Tokyo Polytechnic University. Dynamic time history was studied and wind-induced response was analyzed. The study showed that diaphragm effect greatly increased the structure＇s natural vibration and decreased natural vibration period.Under the action of lateral wind,the lateral displacement wind-induced response of structure decreased and the stress decreased except the joints of connections of beam and column in lee side.

关 键 词：蒙皮效应 风振响应 ANSYS 自振周期 

分 类 号：TU392.5[建筑科学—结构工程]