摘要
建立某框架-核心筒三维空间模型,对原结构和装设黏滞阻尼器的(VD)结构进行八度多遇和罕遇地震下的Taft波、唐山波和人工波双向动力时程分析.在阻尼器数量相同的情况下,以不同响应作为控制目标从黏滞阻尼器的布置位置考虑优化方案,所得成果为耗能减震结构设计提供依据.结果表明:多遇、罕遇地震下黏滞阻尼器对超高层建筑减震效果显著;黏滞阻尼器布设位置对结构性能影响较大,以层间位移角和结构顶层节点峰值位移为控制目标,将阻尼器连续布设在结构中部减震效果最优;以结构顶层节点峰值加速度为控制目标,将阻尼器连续布设在层间变形最大楼层减震效果最优.综合结构实际地震响应结果和自身侧移特性,在保证主体结构正常使用工作状态的前提下,根据不同的控制目标确定最优的布置方案,为阻尼器优化布置提供理论依据.
A simulation study is presented here in investigating an established three-dimensional model of a frame-core tube based on Taft wave, Tangshan wave, artificial wave for two-direction dynamic time history analysis on the original structure and furnished viscous dampers （VD） structure under 8 degree frequent and rare earthquakes. Under the condition of same number in the damper, the study has used different responses from the viscous dampers decorate position optimization scheme as control target. The results obtained provide the basis for energy dissipation damping structure design. The final results show that ： whether frequent or rare earthquakes, viscous dampers are both showed in great damping performance ; viscous dampers setting position has a great influence on structure performance. With the inter-layer displacement angle and peak value of structural top node displacement as control target, dampers cropped continuously in central structure has optimal damping effect. With the peak value of the structural top node acceleration as control target, dampers cropped continuously in the largest deformation between floors has optimal damping effect. Comprehensive seismic responses and lateral characteristic of the structure ensure that the main structure in normal working status, according to different control objectives to determine the optimal arrangement scheme, can provide theoretical basis for the optimal placement of the dampers.
作者
薛娜蕾
杨德健
段美玲
XUE Nalei, YANG Dejian, DUAN Meiling(Tianjin Key Laboratory of Civil Structure Protection and Reinforcement, TCU, Tianjin 300384, Chin)
出处
《天津城建大学学报》
2018年第2期106-115,共10页
Journal of Tianjin Chengjian University
基金
国家自然科学基金(51108301)
关键词
超高层结构
黏滞阻尼器
地震响应
控制目标
优化布置
super high-rise building
viscous damper
seismic response
control objective
optimal layout
