(同济大学建筑设计研究院，上海 200092)

［摘要］盱眙体育馆钢屋盖采用了轻巧的预应力张拉钢桁架结构体系，结合初始态张拉分析及静力性能分析，提出了合理运用张拉预应力的方法。通过动力性能及特征值屈曲分析找出结构的相对薄弱环节；几何非线性整体稳定分析中考虑了初始缺陷的影响，计算结果表明结构不会发生整体失稳和局部失稳。对拉索锚固的关键节点进行弹塑性分析表明，节点具有良好的力学承载性能。

［关键词］预应力钢桁架；张拉体系；特征值屈曲；非线性；套钢管节点

Design of Roof Structure of Xuyi Gymnasium

Yu Zhongjun,Liu Bing,Lu Yan(Architecture Design and Research Institute of Tongji University,Shanghai 200092,China)

Abstract:The roof of Xuyi Gym is a typical pre-stressed steel truss.It mainly introduced the structure layout,and provided a light and efficient tension system. With initial pre-stress and static analysis,the effective method to use the pre-stress was given.Based on the free vibration and eigenvalue buckling analysis,the structural weakness was found. The structural stability analysis,considering the geometric nonlinearity and initial imperfection,is also conducted. The analysis results show that the global and local buckling can be fully avoided. For some key joints,such as cable embedded joint,the exact elastic-plastic analysis was taken,and the results demonstrated the excellent loading capacity of pipe sleeve joint.

Keywords:pre-stressed steel truss; tension system; eigenvalue buckling; non-linear; pipe sleeve joint

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