预应力张拉膜结构节点破坏分析及试验研究  

Failure analysis and experimental study on nodes of prestressed tensioned membrane structures

作　　者：刘书贤[1] 左潇宇 路沙沙[1] 焦东 Liu Shuxian;Zuo Xiaoyu;Lu Shasha;Jiao Dong(College of Architecture and Civil Engineering,Liaoning Technical University,Fuxin 123000,China)

机构地区：[1]辽宁工程技术大学土木学院,阜新123000

出　　处：《建筑结构》2020年第5期93-98,共6页Building Structure

基　　金：国家自然科学基金面上项目(51474045);河南省高等学校重点科研项目计划资助(18A560019)。

摘　　要：由膜片、钢索、支承结构、基础结构通过节点的有效连接而组成的薄膜结构,以其结构重量轻、跨越能力强、施工速度快、抗震性能好、建筑造型丰富等优点得到众多建筑师的青睐。节点构造设计作为膜结构设计中的一个重要环节,不仅关系到膜结构的建筑艺术效果,还关系到结构的整体性和可靠度。针对膜结构节点破坏的问题,以PVC膜材为研究对象,有针对性地选择了膜结构工程中常用的两种连接方式:螺栓夹板连接和U形夹具连接,通过模拟和试验的方法,探究了膜结构节点连接中不同因素对膜面节点强度的影响。通过正交模拟分析和正交试验研究得到了不同因素以及同一因素下不同取值对膜面节点强度影响大小的先后顺序,并从中得到了膜面连接方面的最优水平组合:螺栓间距为80mm,边绳直径为8mm,摩擦系数0.5,垫板厚度10mm的钢板或铝压板。在实际工程同等因素下对于膜结构的节点设计建议优先考虑螺栓间距和边绳直径,橡胶垫片和垫板的厚度可根据现场的施工条件选取即可。The thin film structure composed of diaphragm,steel cable,supporting structure and foundation structure is favored by many architects because of its light weight,strong span ability,fast construction speed,good seismic resistance and abundant architectural modeling.Node structure design,as an important link in membrane structure design,is not only related to the architectural artistic effect of membrane structure,but also to the wholeness and reliability of the structure.Aiming at the problem of the failure of membrane structure nodes,taking the PVC membrane material as the research object,two kinds of connection methods commonly used in the membrane structure engineering were selected pertinently:bolt splint connection and U-shaped fixture connection.Through the orthogonal simulation analysis and orthogonal experiment,the effect of different factors on the joint strength of membrane surface was investigated.The order of influence of different factors and different values under the same factor on the strength of the membrane surface node was obtained by orthogonal simulation and orthogonal experiment,and the optimal level combination of membrane joint was obtained:a steel plate or aluminum compression plate with a bolt spacing of 80 mm,a side rope diameter of 8 mm,a friction coefficient of 0.5 and a thickness of 10mm.For the joint design of the membrane structure under the same factors in practical engineering,the bolt spacing and the diameter of the edge rope are preferred,and the thickness of the rubber gasket and pad can be selected according to the construction conditions of the site.

关 键 词：膜结构 节点破坏 最优水平组合 

分 类 号：TU358[建筑科学—结构工程]