高层核筒悬挂结构地震响应的参数分析  

Parametric Study on Seismic Responses for Core-tube with Suspension Structures

作　　者：王春林[1] 吕志涛[1,2] 吴京[1,2] 

机构地区：[1]东南大学,R.C,&P.C.结构教育部重点实验室,南京210096 [2]东南大学,城市工程科学国际研究中心,南京210096

出　　处：《工程抗震与加固改造》2008年第1期60-63,共4页Earthquake Resistant Engineering and Retrofitting

基　　金：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：本文基于地震响应时程,对高层核筒悬挂结构进行参数分析。首先给出了悬挂减振结构体系的计算模型,在此基础上给出了以主体核筒的顶点位移和基底剪力响应为综合优化目标,悬挂楼面的层间位移角为约束条件的优化数学模型,对设置于核筒和悬挂楼面之间粘滞阻尼器的刚度和阻尼系数进行优化。结果表明:存在最优阻尼器的阻尼系数,使得主体核筒的响应最小;当阻尼器的刚度较小时,可以忽略其对结构动力响应的影响;悬挂楼面的层间位移角作为约束条件,影响结构参数的优化值;通过设置合理的参数才能够同时满足优化目标和悬挂楼面的层间位移角限值。Based on seismic time-history analysis, parametric studies on core-tube with suspension structures are presented in this paper. The simplified method about this structure is given, optimization model considering core-tube top displacement and base shear as optimization objectives and keeping inter-story drift ratio of the suspended floors as constraint condition is summarized, and structural parameters such as damping coefficient and damper stiffness are optimized. The results show that there are optimal damping coefficient leading to the minimum response of the primary core-tube, and that the dynamic response is not sensitive to the lesser damper stiffness, and that the optimal value affected by inter-story drift ratio of the suspended floors as constraint condition and setting reasonable structural parameters could meet the optimization objectives and the inter-story drift ratio limit of the suspended floors.

关 键 词：高层建筑 悬挂结构 阻尼 时域分析 优化 

分 类 号：TU973.2[建筑科学—结构工程]