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.
引文
[1]Kawaguchi K.A Report on Large Roof Structures Damaged bythe Great Hanshin-Awaji Earthquake[J].International Jour-nal of Space Structures,1997(3):135-147.
[2]Moghaddam H A.Seismic Behavior of Space Structures[J].International Journal of Space Structures,2000(2):119-136.
[3]Murata M,Hirata M.Nonlinear Dynamic Analysis SystemforLarge-Scale Space Structures Under Multiple Loadings[C]//Proc.of I ASS Symposium.2001:176-177.
[4]董石麟,夏亨熹.正交正放类网架结构的拟板(夹层板)分析法(上)[J].建筑结构学报,1982(2):14-25.
[5]董石麟,夏亨熹.正交正放类网架结构的拟板(夹层板)分析法(下)[J].建筑结构学报,1982(3):14-22.
[6]白学丽.多维多点输入下大跨空间网格结构地震响应及构件可靠度分析[D].南京:东南大学,2006.
[7]李宏男.结构多维抗震理论与设计方法[M].北京:科学出版社,1998.
[8]林家浩,张亚辉.随机振动的虚拟激励法[M].北京:科学出版社,2004.
[9]薛素铎,王雪生,曹资.空间网格结构多维多点随机地震响应分析的高效算法[J].世界地震工程,2004,20(3):43-49.
[10]GB 50017—2003钢结构设计规范[S].
[11]GB 50011-2001建筑抗震设计规范[S].
[12]孙建梅.多点输入下空间结构抗震性能和分析方法的研究[D].南京:东南大学,2005.
[13]王墩,阿肯江.托呼提.工程结构设计可靠度理论综述[J].工业建筑,2008(增刊):217-221.
[14]刘占省,侯钢领.基于极限承载力的网架结构体系可靠度评价[C]//庆祝刘锡良教授八十华诞暨第八届全国现代结构工程学术研讨会论文集.天津:2008.
[15]李国强,李杰,苏小卒.建筑结构抗震设计[M].北京:中国建筑工业出版社,2002.
[16]郭全全,张文芳,吴桂英,等.中国国家大剧院结构地震分析[J].工程力学,2003,20(2):43-48.