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。
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.
出处
《工业建筑》
CSCD
北大核心
2010年第S1期356-359,共4页
Industrial Construction
关键词
网架结构
模态分析
自振频率
动力响应
space grid structure
modal analysis
natural frequency
dynamic response
