高层剪力墙结构消能连梁设计案例分析及几个问题的讨论  

Case analysis and discussion on the designing of energy-dissipative coupling beams in high-rise shear wall structures

作　　者：景铭 戴君武[1] 刘永彬[1] JING Ming;DAI Junwu;LIU Yongbin(Institute of Engineering Mechanics, China Earthquake Administration, Key Laboratory of Earthquake Engineering and Engineering Vibration of China Earthquake Administration, Harbin 150080, China)

机构地区：[1]中国地震局工程力学研究所,中国地震局地震工程与工程振动重点实验室,黑龙江哈尔滨150080

出　　处：《地震工程与工程振动》2017年第6期79-89,共11页Earthquake Engineering and Engineering Dynamics

基　　金：地震行业科研专项经费项目(201508023);国家科技支撑计划课题(2015BAK17B02);中国地震局创新团队发展计划资助项目~~

摘　　要：本文选取两栋高层剪力墙结构住宅工程案例,采用ETABS软件分析并讨论了高层剪力墙结构中安装位移型钢滞变阻尼器连梁进行消能减震设计的几个关键问题。以阻尼器刚度、设计极限位移、附加阻尼比等参数为基本参量,以层间位移角和层间剪力为减震效果优劣评价指标,对比研究了阻尼器空间布设位置和数量变化对结构地震反应的影响规律。验证了阻尼器刚度参数变化影响结构主振周期变化,进一步影响层间剪力减震效果;阻尼器设计极限位移参数变化引起结构整体耗能能力变化,即阻尼器的设置增加了结构附加阻尼比尤其是大震附加阻尼比,使结构大震作用下的层间位移反应得到有效控制。给出了如下设计建议:当在高层剪力墙结构中采用消能连梁进行消能减震设计时,应尽可能将阻尼器布置在受力较大的连梁位置处,并使阻尼器的设计屈服位移和极限位移分别与结构设计弹性层间位移和弹塑性层间位移相匹配。在设计过程中应通过调整阻尼器刚度尽可能延长消能减震结构的基本振动周期,优化阻尼器布设位置和数量,最大限度地增大阻尼器对结构的附加阻尼比贡献,达到显著降低结构地震反应的目的。In this paper, several key problems were discussed and analyzed by utilizing steel hysteretic damper cou- pling beams in actual high-rise shear wall structure housing project to do seismic energy dissipation design. The damper stiffness, design ultimate displacement and additional damping ratio were set as basic parameters, inter-sto- ry displacement angle and story shear force and were set as the damping effect evaluation index and the influence pattern of structural seismic response were obtained by comparing the different damper layout positions and quanti- ties. This paper verified that the changing of damper stiffness parameters could have great influence on structure vi- bration period and further affect the damping effect of the story shear force. Also, the various damper design ulti- mate displacement parameters could have significantly different overall energy dissipation capacity which perform- ance in increase the structure additional damping ratio, especially the strong earthquakes additional damping ratio, so that the inter-story displacement angle that under strong earthquakes could be effectively controlled. Design sug- gestions as follows： when energy-dissipative coupling beams were utilized to do seismic energy dissipation design in high-rise shear wall structures, we should first decorate the dampers to the places which bear considerable loads then guarantee the damper＇s design yield displacement and ultimate displacement respectively matching the struc- ture elastic inter-story displacement and the elastoplastic inter-story displacement. During the design processes, the basic vibration period of the passive energy dissipation structure was supposed to be extended as much as possible by adjusting the damper stiffness and the damper layout position and quantity should be optimized to maximize the damper＇ s contribution to the additional damping ratio, through the above methods, the goal of reduce the structure response under the earthquake could be obtained.

关 键 词：高层剪力墙结构 消能连梁 附加阻尼比 刚度 自振周期 

分 类 号：TU352[建筑科学—结构工程] TU398