大跨度索穹顶结构温度响应分析

根据鄂尔多斯伊旗全民健身体育中心大跨度索穹顶结构设计要求，采用有限元分析方法，分析了初始预应力和温度共同作用下节点位移和预应力索应力变化情况，研究了初始预应力对温度效应的影响，探讨合理张拉温度以及由于温度作用对初始预应力采取的适当补偿措施。研究表明：温度作用对索穹顶结构外圈索和外圈撑杆的应力产生不可忽视的影响，在设计张拉预应力度时，既要考虑施工张拉温度与下料温度不同的影响，又要保证正常使用状态下结构在温度作用下的安全；温度作用下预应力度对索穹顶结构静力性能的影响显著。

Temperature response analysis of large-span cable dome structure

According to the structure design requirement of the National Fitness Center in Ejin Horo Banner,Inner Mongolia,the size of the nodal displacement and the stress change of prestressed cable under initial prestressing force and temperature were researched using finite elements method.Rational tensioning temperature and appropriate compensation measures of initial prestressing force loss because of temperature effect were investigated.The influence of the temperature effect was analyzed under initial prestress.The results show that temperature action on the cable dome structure especially the outer cable and strut stress can not be ignored.In the design of tensioned prestress level,not only the different influences of construction temperature and material cutting temperature should be considered respectively,but also the safety of structure under temperature effect should be guaranteed for normal service condition.The impact of temperature effects parameters on the static behavior of cable dome structure is significant.