【摘要】 首先推导了大跨空间结构几何非线性地震响应时程分析的计算过程,编制了相应的计算程序,然后重点对圆柱面交叉立体桁架系巨型网格结构进行几何非线性地震响应时程分析.针对主体结构单独承载及子结构参与协同承载两种情况,分析了立体桁架拱内关键节点及关键杆件的地震响应时程曲线,了解了结构基本地震响应时程特性;进行了不同方向地震波作用时程对比分析,论证了该结构抗震验算需考虑三维地震作用;最后将振型分解反应谱法与时程法结果进行了对比分析,说明了对于该结构,反应谱法可用作初步的抗震分析,但最终必须用时程法进行验算.更多还原

【Abstract】 <Abstrcat>The computer formulations and the programs of geometrical nonlinear seismic responses of long span space structures subjected to earthquake waves were developed first. Then the geometrical nonlinear seismic time-history response behaviors of the cylindrical latticed-intersected-three-dimensional-beam-system (LITDBS) reticulated mega-structure were analyzed. The displacement time-history response curves of some key nodes and dynamic internal force time-history response curves of some key members in arched latticed 3d beams were investigated under both conditions of the main structure bearing the load by itself and cooperatively with substructures. Therefore the basic seismic time-history response property of the structure was obtained. Comparative analyses of the time-history response of the structure subjected to earthquake waves from different directions were carried out, which proved that three-component earthquake waves should be considered in seismic checking calculations of this structure. Lastly, the calculation results of vibration mode-decomposition-response-spectra method and time-history method were compared, from which the conclusion was drawn that the vibration mode-decomposition-response-spectra method could be used for preliminary analysis, but in the end, the time-history method must be used for the seismic checking calculation of this new structure.更多还原