大底盘非对称双塔楼高层建筑动力响应分析  

Dynamic response analysis of an asymmetric two-tower tall storeyed building with enlarged base

作　　者：朱宏平[1] 陈晓强[1] 张世顺[1] 

机构地区：[1]华中科技大学土木工程与力学学院,湖北武汉430074

出　　处：《华中科技大学学报（自然科学版）》2006年第7期104-107,共4页Journal of Huazhong University of Science and Technology(Natural Science Edition)

基　　金：教育部新世纪优秀人才支持计划资助项目(2004);武汉市建委科研计划资助项目(2005-18).

摘　　要：运用ETABS对左右塔楼均为29层的圣淘沙大厦进行了地震作用下三维动力响应分析,得到了各阶振型的参与系数和改变振型选取数时结构内力的变化情况,讨论了大底盘双塔楼高层建筑在运用振型分解法计算地震作用时振型数的一般选取原则.然后改变左塔楼楼层数而固定右塔楼为15层,通过选取不同的振型数进行动力响应计算,分析了非对称双塔楼内力随选取的振型数的增加而变化的规律,并与原始结构的计算结果进行了比较,说明了地震作用下非对称双塔楼底部剪力比对称结构大.最后,讨论了左右塔楼内力随左塔楼的层数改变的变化情况,并比较了左右塔楼的内力与相应的单体结构的内力.Three dimensional dynamic response of a 29-storeyed building with right and left towers to earthquake was analyzed by using the commercial structure analysis software ETABS. Obtained the participation coefficients of vibration modes with different orders and the changing behavior of internal forces with the chosen numbers of vibration modes. The principle for choosing the vibration mode number of two-tower tall buildings with enlarged base was also discussed while the earthquake effect was analyzed by using the mode decomposition method. Then, by changing the number of the left tower and fixing the number of the right one to be 15, the change of each tower＇s internal force under earthquake with the number of the chosen mode shape was analyzed. The comparison of the results of the anti-symmetric structure with the original structure shows that the shear force of the anti-symmet- ric structure is larger than that of symmetric one. Finally, the variety of each tower＇s internal force with number of the left tower＇s storey is discussed and the results are compared with that of the single-tower structure.

关 键 词：双塔楼 动力分析 大底盘 

分 类 号：TU312[建筑科学—结构工程]