悬索及其索网在高温(火灾)作用下的计算  

ANALYSIS OF CABLE AND CABLE-NET STRUCTURES AT HIGH TEMPERATURE(IN FIRE)

作　　者：周焕廷[1,2] 李国强[2] 罗永峰[2] 

机构地区：[1]武汉理工大学土木工程与建筑学院,武汉430070 [2]同济大学土木工程学院,上海200092

出　　处：《工业建筑》2009年第2期106-108,127,共4页Industrial Construction

基　　金：国家杰出青年科学基金项目(50225825)

摘　　要：对悬索及其双曲索网结构在索张紧状态下发生火灾时结构的反应特点进行分析。在节点荷载作用下,悬索及其双曲索网的面内位移相对于面外位移来说是一个较小量,可以忽略;且高温作用下索网结构具有"卸载"的特性,据此对悬索及其索网结构在荷载作用同时经受高温作用时结构反应进行理论推导,同时,考虑了材料和索网结构的几何非线性问题。算例表明,该方法正确、简便,精度满足工程要求。The response characteristic of hyperbolic paraboloid cable-net in fire, such as displacement and inner force, have been investigated. The in-plane horizontal displacement of cable-net structure under concentrated load is small enough relative to the out-plane displacement of the cable net, which can be ignored. A simplified method, which considers the material and geometric nonlinear property, is presented to analyze the behavior of cable-net structure at high temperature. To validate the method, two models are analyzed by the simple method and finite element method （FEM）. Comparisons of two results indicate that the simplified method is correct and convenient to analysis the cable net structure in fire （at high temperature）.

关 键 词：双曲索网 火灾反应 简化算法 双重非线性 

分 类 号：TU399[建筑科学—结构工程]