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以钢管桁架、平板网架、双层球面网壳及双层柱面网壳等常用空间网格结构为研究对象,采用振型分解反应谱法进行地震反应分析,分别按《空间网格结构技术规程》及振型质量参与系数累积达到90%确定参与组合的振型数量,通过对所得网格结构杆件动应力相对误差的比较,确定采用振型分解反应谱法进行空间网格结构地震反应分析时所需参与组合的合理振型数量.
Taking the common spatial grid structures such as steel truss, flat grid, double-layer spherical reticulated shell and double-layer reticulated shell as the research objects, the seismic response analysis was carried out by using the mode decomposition decomposition response spectrum method. According to "Spatial Mesh Structure Technology Rules and modal quality participation coefficient reached 90% to determine the number of modes involved in the combination. By comparing the relative errors of the dynamic stress of the bars of the grid structure, the vibration response of the spatial grid structure was determined by the modal decomposition response spectrum method The number of reasonable modes required to participate in the analysis.