附设阻尼支撑的摩擦隔震系统的力学建模与数值模拟  

Mechanical Modeling and Numerical Simulation of Friction Isolation System with Additional Viscous Damper

作　　者：周年强 施卫星[1] ZHOU Nianqiang;SHI Weixing(Department of Disaster Mitigation for Structures,Tongji University,Shanghai 200092,China;College of Civil Engineering,Nanjing Forestry University,Nanjing 210037,China)

机构地区：[1]同济大学结构防灾减灾工程系,上海200092 [2]南京林业大学土木工程学院,南京210037

出　　处：《结构工程师》2019年第5期111-118,共8页Structural Engineers

摘　　要：针对基础隔震建筑在地震作用下的动力特性进行分析研究,提出了一种新型隔震设计方案——带有侧向阻尼支撑的滑移摩擦隔震系统(D-FS),并给出了系统的动力学方程。根据系统的运动特点,基于MATLAB语言编制了该系统的时程分析程序。将计算结果与相关文献及ANSYS有限元计算进行比较,证明该程序理论依据合理,计算结果正确。初步分析表明,经过合理的设计,在多种地震作用下,由于侧向阻尼器和隔震层的协同工作,D-FS的地震响应均有明显减少,与单纯基础隔震系统(P-FS)对比发现,其整体变形较小,且残余位移可得到有效控制。This paper presents a new base isolation system,a friction isolation system with additional side-mounted viscous damper(D-FS).The mechanical model of the combined isolation system is presented.An algorithm derived from mechanical model is proposed and programmed with MATLAB to calculate the seismic responses of D-FS,such as displacement,velocity,acceleration.Compared with the results introduced in reference,the calculated results show rather higher calculation precision and basically an agreement with the ANSYS results,which means the theoretical model is reasonable and that simulation results by the program are accurate and reliable moreover optimization design and analysis show a good isolation effect.Compared with traditional structure,the seismic response of the D-FS can be dramatically reduced,compared with friction isolation structure,the basic maximum sliding displacement and residual displacement can be effectively controlled.

关 键 词：隔震建筑 隔震层 混合隔震 黏滞阻尼器 侧向阻尼支撑 

分 类 号：TP3[自动化与计算机技术—计算机科学与技术]