半柔性悬挂减振结构体系地震反应分析  

Seismic response of semi-flexible suspension vibration-Absorption structures

作　　者：王春林[1] 吕志涛[1] 吴京[1] 

机构地区：[1]东南大学混凝土及预应力混凝土结构教育部重点实验室,江苏南京210096

出　　处：《建筑结构学报》2008年第6期107-112,共6页Journal of Building Structures

基　　金：国家973计划(2007CB714200);国家自然科学基金资助项目(50178018);东南大学优秀博士学位论文基金资助(0706)

摘　　要：针对一种新型高层建筑半柔性悬挂结构体系提出阻尼减振控制的方案。首先,阐述了结构体系构建方案及优越性;其次,以主体结构的时程响应最大值最小为控制目标,对粘滞流体阻尼器的阻尼系数进行优化分析;最后,基于最优的阻尼器参数,对半柔性悬挂减振结构与普通悬挂抗震结构进行了时程对比分析。结果表明:半柔性悬挂减振结构能够有效地消弱结构的峰值响应;存在最优的阻尼系数使得主体结构的顶点位移和基底剪力动力响应最小;悬挂楼段保持较小层间位移,有效发挥了各层阻尼器的效率,保护了非结构构件。A damping vibration-controlling approach aiming at innovative semi-flexible suspension structures is presented in this paper. The mechanism and the advantages of this structure are illuminated. The damping coefficient of fluid viscous dampers was optimized to minimize the maximum time history response of the primary core-tube. Based on the optimum damping coefficient, the seismic performance was demonstrated in comparison with the normal suspension structures by the time history analysis. The results show that this structure can effectively reduce peak responses of the primary structure, and that there is the optimum damping coefficient of fluid viscous dampers leading to the minimum top floor displacement and base shear force of the primary structure, and that the little inter-story drift of the suspended segment is helpful to make each fluid viscous damper work more efficiently and to protect the non-structural members.

关 键 词：高层建筑 悬挂结构 柔性层 粘滞流体阻尼器 有限元分析 地震反应 

分 类 号：TU351[建筑科学—结构工程]