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以宁波国际会展中心(二期)为例,采用有限元法分析网架结构在静载作用下的结构变形,发现存在使结构变形最小的网架合理高度。通过对网架结构模态的分析发现,网架的振动以前25阶振型为主。在三维地震波作用下,结构的位移响应明显大于一维和二维地震作用;对加速度峰值相同的不同地震波,结构的最大位移不相同。
Taking Ningbo International Convention and Exhibition Center (Phase II) as an example, the finite element method is used to analyze the structural deformation of the grid structure under static load. It is found that there is a reasonable height of the grid structure that minimizes the structural deformation. Through the analysis of the structure of the grid structure, it is found that the vibration of the grid structure is dominated by the first 25 modes. Under the action of 3D seismic wave, the displacement response of the structure is obviously larger than that of one-dimensional and two-dimensional seismic. For different seismic waves with the same acceleration peak, the maximum displacement of the structure is not the same.