分层摇摆式连接减震结构体系分析研究  

Fundamental study on swing story-lateral force resisting structural system connected with dampers

作　　者：李旺 项平[1] 贾良玖[1] 吴明儿[1] LI Wang;XIANG Ping;JIA Liangjiu;WU Minger(College of Civil Engineering,Tongji University,Shanghai 200092,China)

机构地区：[1]同济大学土木工程学院,上海200092

出　　处：《地震工程与工程振动》2018年第4期100-104,共5页Earthquake Engineering and Engineering Dynamics

基　　金：国家自然科学基金项目(51608391)~~

摘　　要：分析研究了一种新型的结构减震控制体系——分层摇摆式连接减震结构体系。该体系由分层摇摆式竖向自承重主结构、抗水平侧力外框架副结构、以及连接主副结构的阻尼器组成。其中,分层摇摆式竖向自承重体系由分层两端铰接柱和层贯通梁组成,外框架承受水平外荷载,同时阻尼器可以传递侧向力并且起到消能减震的作用。相比于传统抗弯框架,该体系可以同时减小基频和高阶模态响应。通过基于H2控制算法和稳定度最大化准则,采用多目标优化算法优化设计连接阻尼器各参数。通过3层benchmark模型的有限元分析和两层原理模型的小型振动台试验验证了理论模型的正确性,同时表明该体系具有理想的减震控制效果。This paper studies on a proposed vibration control system consisting of a swing story substructure,a lateral force resisting substructure,and connecting dampers. The swing story substructure comprising hinged columns connected to continuous beams is employed to resist gravityloads,and perimeter moment-resisting frames lateral forces. Dampers are adopted to transfer lateral forces between the two substructures and are used to dissipate seismic energy. The main characteristic of the system is that both the fundamental and higher-mode responses can be reduced remarkably compared with conventional moment-resisting frame structures. Stiffness and damping parameters of the connecting dampers are optimally designed by using a multi-objective optimization method based on the H2 and stability maximization criteria. Excellent vibration control effects of the proposed system are verified through numerical analyses of a three-story benchmark structure and small scale shaking table tests of a two-story model.

关 键 词：减震控制 分层摇摆体系 承重抗侧力分离体系 多目标优化 振动台试验 

分 类 号：TU352.1[建筑科学—结构工程]