摘要
本文采用3D3S 14.1针对某游泳馆单层凯威特型球面网壳屋盖结构进行结构计算与分析，分别对结构的模态、内力和位移进行分析，研究表明：结构前3阶模态自振周期分别为0.36s、0.34s和0.31s，最不利振型为顶部Z向上下平动。网壳结构杆件最大压力为-129.5kN，结构最大负位移为-21.0mm，且最不利内力和位移均发生在支座处。结构构件应力比最大值为0.78，能够满足承载力计算要求。
关键词： 网壳结构；自振周期；内力和位移；最不利位置
Abstract
In this paper, 3D3S 14.1 is used for the structural calculation and analysis of a single-layer Kaiwitt-type spherical reticulated shell roof structure of a swimming pool, and the modal, internal force and displacement of the structure are analyzed respectively. The periods are 0.36s, 0.34s and 0.31s, respectively, and the most unfavorable mode shape is the top Z translation up and down. The maximum pressure of the reticulated shell structure rod is -129.5kN, the maximum negative displacement of the structure is -21.0mm, and the most unfavorable internal force and displacement occur at the support. The maximum stress ratio of structural members is 0.78, which can meet the calculation requirements of bearing capacity.
Key words： Reticulated shell structure; Natural vibration period; Internal force and displacement; The most unfavorable position
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