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折板式网壳结构是一种优良的空间结构,其静力性能和经济性均优于普通网架,而且建筑造型优美,形式丰富。本文采用振型分解反应谱法和时程分析法对折板式网壳结构的动内力作了研究,计算分析了结构厚度、坡度等参数对动内力的影响。通过计算表明,折板式网壳的动内力仅为相应网壳的二分之一,动内力的分布规律也有别于一般网架。除个别杆件外,折板式网壳杆件的动静内力之比约为10%。此外,采用反应谱法与时程法两者计算结果基本一致。本文计算结果可供工程设计时参考。
Flap reticulated shell structure is an excellent space structure, its static performance and economy are superior to the ordinary grid, and the architectural modeling is beautiful, the form is rich. In this paper, the dynamic internal force of the claw-shell reticulated shell structure is studied by using the mode decomposition decomposition time-history method and the time-history analysis method. The influences of structural thickness, slope and other parameters on the dynamic internal force are calculated and analyzed. The calculation shows that the dynamic internal force of the folded plate reticulated shell is only one half of that of the corresponding reticulated shell, and the distribution of dynamic internal force is also different from that of the common truss. Except for individual bars, the ratio of the static and dynamic internal forces of the folded plate reticulation bars is about 10%. In addition, both the response spectrum method and the time-history method are basically the same. The results of this paper are available for engineering design reference.