折板式网壳结构的动力性能分析

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。

Dynamic Property Analysis of Folded Plate Type Latticed Shell

Folded plate type latticed shell is one of the good spatial structures with static and economic characteristics superior to ordinary space grids; moreover,it is elegant in shape and rich in pattern. In this paper, the dynamic properties of folded plate type latticed shell are studied by modal analysis, response spectrum and time history method with the effects of thinness and slope on dynamic internal forces also discussed. The calculation indicates that the dynamic internal forces are merely half of those of the ordinary space grids, and its distribution law is also different. The dynamic force is about 10% of the static force. In addition,the results obtained from the response spectrum and time history method are nearly the same. The results in this paper can be referenced for practical engineering design.