张弦空间结构与下部结构静力相互作用分析  

Analysis of static interaction effect between spatial truss string structure roof and supporting structure

作　　者：丁洁民[1] 温家鹏[2] 何志军[1] 

机构地区：[1]同济大学建筑设计研究院,上海200092 [2]同济大学建筑工程系,上海200092

出　　处：《建筑结构》2009年第5期38-44,共7页Building Structure

摘　　要：根据国内张弦结构项目屋盖的关键受力构件布置方式与支承边界平面水平投影线的组合进行了屋盖结构分类,从屋盖支座设置方式和索初始预拉力入手,分析了张弦桁架结构屋盖在不同支座形式时不同索初始预拉力对下部支承结构的作用力及屋盖结构的力学响应。分析表明,为充分实现张弦屋盖的自身控制功能,降低张弦桁架空间屋盖与下部支承结构的静力相互作用影响,应从屋盖结构总体系的层面综合考虑进行张弦桁架空间屋盖结构的布置,合理确定索初始预拉力,从而正确选择结构静力设计计算模型。Roof structure system is classified based on the arranging mode of key load-bearing members and horizontal projection lines of roof support border, which were used in domestic spatial string structure projects. The force loaded by spatial truss string structure roof to its under support and the mechanical response of roof itself with different roof brackets and different string initial tensile force are analysed. According to the analysis, in order to achieve a good function of self-control, as well as decrease the static interaction between spatial truss string structure roof and its under support, a means may be considered about the structure- array of spatial truss string structure roof based on the whole roof framing system and determined the string prestressing properly, therefore an appropriate computational model can be chosen for structures＇ static design.

关 键 词：张弦桁架结构 支座 索预拉力 结构体系 相互作用 

分 类 号：TU984.113[建筑科学—城市规划与设计] U443.2[建筑科学—桥梁与隧道工程]