【摘要】 运用非线性有限元理论,以东南大学九龙湖校区体育馆异形钢柱支撑的轮辐式张弦梁结构为对象,分析了异形钢柱对轮辐式张弦梁结构模态特征及内力和变形的影响.同时对异形钢柱支撑轮辐式张弦梁结构的两种索张拉施工过程进行了模拟对比分析.分析结果表明:前三阶振型中异形柱与整体有同方向的变形,第四到第六振型主要以异形柱钢架局部的对称平动为主;异形钢柱对轮辐式张弦梁结构的内力影响不大,对位移的影响较大;一次张拉比分批张拉简化了张拉程序,一次张拉时结构的最大位移比分批张拉小,但各索的实际拉力偏大.更多还原

【Abstract】 This paper takes the radiant beam string gymnasium supported by special-shaped steel columns in Jiulonghu Campus of Southeast University as the example.The nonlinear finite element theory was applied to analyze the influence of special-shaped steel columns on modal characteristics of radiant beam string structure including internal force and deformation.The construction simulation of two cable-tension methods for radiant beam string structure was discussed and compared.The modal analysis showed that the columns shared the same deformation direction with the entire trend in the first 3 modes while the symmetrical translation of columns was mainly showed from 4th to 6th modes.The special-shaped steel columns obviously influenced the displacement of radiant beam string structure,while had little effect on the internal force of members.The single-tension method simplified the procedure when compared with batch tension method.It was found that while the maximum displacement of the structure was smaller in the single-tension method,the actual tension force of each cable was larger.The maximum stress of members was located in the lowest point of the rigid ring as well as the joint of the roof and the steel columns.更多还原