设置新型自复位阻尼器的隔震结构动力响应控制效果分析
摘要：针对常规黏滞阻尼器不具备自复位能力的问题，研发新型自复位阻尼器，该阻尼器主要由导杆、密封外筒和碟形弹簧组成。通过构造设计，可使阻尼器受拉和受压时碟形弹簧均处于压缩状态，从而为阻尼器提供弹性恢复力。根据阻尼器工作原理与力学特性建立阻尼器理论滞回模型，采用有限元分析软件SAP2000建立无控结构、常规隔震结构和自复位隔震结构模型，分别进行动力响应分析。研究结果表明，新型自复位阻尼器不影响结构自振周期，可使结构加速度和位移得到有效控制;对于自振周期与地震动卓越周期相近的结构，新型自复位阻尼器动力响应控制效果优于常规黏滞阻尼器;数值模拟计算得到的新型自复位阻尼器滞回曲线饱满，呈双线性特征，与理论滞回模型相符。
关键词：隔震结构阻尼器自复位动力响应有限元分析
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[4] ZHU S Y,ZHANG Y F.Seismic analysis of concentrically braced frame systems with self-centering friction damping braces[J].Journal of structural engineering,2008,134(1):121-131．
[5] KHADER S A,NAISH D,LANNING J.Experimental evaluation and development of a self-centering friction damping brace[C]//Structures Congress 2017,2017．
[6] OZBULUT O E,SILWAL B,MICHAEL R.Design and component testing of an SMA-based seismic control device[C]//Structures Congress 2015,2015．
[7] MILLER D J,FAHNESTOCK L A,EATHERTON M R.Selfcentering buckling-restrained braces for advanced seismic performance[C]//Structures Congress 2011,2011．
[8] 董金芝，李向民，张富文，等．基于SMA装置的框架-受控摇摆墙结构抗震性能试验研究[J]．土木工程学报，2019,52(4):41-51．
[9] 董金芝．基于大直径SMA棒材自复位装置的试验研究[J]．结构工程师，2018,34(4):101-108．
[10] DONG H H,DU X L,HAN Q,et al.Hysteretic performance of RC double-column bridge piers with self-centering bucklingrestrained braces[J].Bulletin of earthquake engineering,2019,17(6):3255-3281．
[11] DONG H H,DU X L,HAN Q,et al.Performance of an innovative self-centering buckling restrained brace for mitigating seismic responses of bridge structures with double-column piers[J].Engineering structures,2017,148:47-62．
[12] DONG H H,DU X L,HAN Q,et al.Numerical studies on the seismic performances of RC two-column bent bridges with selfcentering energy dissipation[J].Journal of structural engineering,2020,146(4):04020038.1-04020038.16．
[13] 蒋璐，李向民，张富文，等．设置碟形弹簧的框架-摇摆墙结构抗震性能试验研究[J]．建筑结构学报，2019,40(8):61-70．
[14] ISSA A S,ALAM M S.Seismic performance of a novel single and double spring-based piston bracing[J].Journal of structural engineering,2019,145(2):04018261.1-04018261.18．
[15] XU L H,FAN X W,LI Z X.Cyclic behavior and failure mechanism of self-centering energy dissipation braces with prepressed combination disc springs[J].Earthquake engineering&structural dynamics,2017,46(7):1065-1080．
[16] XU L H,XIE X S,LI Z X.A self-centering brace with superior energy dissipation capability:development and experimental study[J].Smart materials and structures,2018,27(9):085017．
[17] XU L H,FAN X W,LI Z X.Development and experimental verification of a pre-pressed spring self-centering energy dissipation brace[J].Engineering structures,2016,127:49-61．
[18] XU L H,XIE X S,LI Z X.Development and experimental study of a self-centering variable damping energy dissipation brace[J].Engineering structures,2018,160:270-280．
[19] 龚宇伟，布占宇．黏滞阻尼器在框架结构抗震加固中的应用研究[J]．施工技术，2019,48(15):25-28,73.
Analysis of Dynamic Response Control Effect for the Isolation Structure with Innovative Self-centering Dampers
Abstract: Aiming at the problem that conventional viscous dampers do not have self-centering capability,an innovative self-centering damper,which is composed of a guide rod,a sealed outer cylinder,disc springs,was proposed in this paper. Through structural design,whether the damper is under tension and compression,the disc springs were all in a compressed state to provide elastic restoring force. According to the working principle and mechanical characteristics of dampers,a theoretical hysteresis model was established. The particle system models of uncontrolled structure,isolation structure with conventional viscous dampers,and self-centering isolation structure with self-centering dampers were established using the finite element analysis software SAP2000,and the dynamic response analysis of the structures under different seismic waves was conducted. The research results show that the innovative self-centering damper has no effect on the natural vibration period of the structure,but the acceleration response and displacement response are significantly reduced. For structures whose natural vibration period is similar to the predominant period of ground motion,the dynamic response control effect of the innovative selfcentering damper is better than that of the conventional viscous damper. The hysteresis curve of the innovative self-centering damper obtained by numerical simulation is full and bilinear,which is consistent with the theoretical hysteresis model.
Keywords: isolation structures; dampers; self-centering; dynamic response; finite element analysis
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