【摘要】 地震载荷是影响复杂空间钢架结构稳定性的一个重要因素。以北京水立方多面体空间钢架结构为例,借助SAP2000有限元分析软件,对国家游泳中心空间钢架结构采用扩展模态法进行模态分析,得出其结构固有振动特性。通过建立地震载荷模型和加载分析扩缩,针对整体模型和模型局部节点进行动力学分析,表明地震载荷下水立方空间钢架结构具有良好的稳定性和抗震性,并且在此模型基础上进行阻尼减震控制,通过与控制前的模型进行时程分析,验证得出水立方空间钢架结构具有良好的振动控制性能。更多还原

【Abstract】 The seismic load is an important factor that affects the stability of the complex space frame structure. This paper takes Beijing Water Cube’s polyhedron space steel frame structure as an example,and by means of SAP2000 finite element analysis software,adapts the extended-mode method for modal analysis of space steel frame structure to derive its structural natural vibration characteristics.Through the establishment of seismic loads and loads analysis scaling model,it does dynamic analysis of the whole model and the model for local node,showing that the water cube space steel structure under seismic load keeps good stability and shock resistance. And damping control performs on Water cube model,proving that water cube space steel structure has good vibration control performance through pre-model control time-history analysis.更多还原