【摘要】 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。更多还原

【Abstract】 FEM method is used to analyze the static deformation of the space grid structure based on Ningbo International Conference and Exhibition Center(phase-Ⅱ).It is found that there is a suitable height of the structure,corresponding to a minimum deformation.Modal analysis is done for the structure,and these results show that the variation of the first 25 natural frequencies is larger than that of the other orders.The 3-dimention dynamic response of the space grid structure under different earthquake actions is analyzed.Calculations show that the displacement of the structure for the 3-D earthquake action is larger than the one-dimension and two dimension cases.Though the peak values of the acceleration for the different earthquake waves are the same,the peak displacements are not identical for these waves.更多还原