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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。
According to the design requirements of large-span cable dome in Erduosiqi National Fitness Center, the finite element analysis method was used to analyze the joint displacement and the stress change of prestressed cable under initial prestress and temperature. The effect of initial prestress on temperature effect To explore the reasonable tension temperature and the appropriate compensation for the initial prestress due to temperature. The research shows that the temperature can not neglect the stress of the outer ring cable and the outer ring stay of the cable dome structure. When designing the prestressing degree of tension, it is necessary to consider the different effects of the construction tension temperature and the feed temperature. It is necessary to ensure the safety of the structure under the normal operating conditions. The influence of the prestressing force on the static performance of the cable dome structure under temperature is significant.