质量减震消能系统减震性能数值计算分析  

料, SimscapeNumerical Analysis on Seismic Performance of MES System

作　　者：赵孜铭 施卫星[1] ZHAO Ziming;SHI Weixing(Department of Disaster Mitigation for Structures,Tongji University,Shanghai 200092,China)

机构地区：[1]同济大学结构防灾减灾工程系,上海200092

出　　处：《结构工程师》2023年第5期62-70,共9页Structural Engineers

摘　　要：介绍了一种由工程结构顶部的非结构质量与有刚度的摩擦支座以及限位黏弹性材料组成的新型分阶段耗能系统,在地震输入较小时,主要由摩擦摆滞回耗能,当支座与黏弹性材料碰撞后,该系统则由支座阻尼耗能。通过MATLAB中的Simscape模块分析该新型减震系统的力学模型并以四层框架结构为例,与传统隔震结构与设置调谐质量阻尼器减震结构进行减震性能对比。结果表明:质量减震消能系统(MES)既能利用质量系统耗散能量,有效控制楼层最大位移和层间位移角,又能利用结构中的隔震支座降低楼层绝对加速度,从而减少地震输入结构能量,降低建筑物损伤。A novel multi-stage seismic mitigation system consisting of non-structural mass,friction isolator and viscoelastic materials is proposed.The low input seismic energy is mostly dissipated by the hystereticbehavior of the friction isolator,and the damping properties work until the pounding of the isolator and viscoelastic materials occurs.The mechanical model of the MES system is analyzed using the Simscape module in MATLAB software,and the seismic performance of the MES system is compared with conventional baseisolated system and tuned mass damper systems.The results show that,the MES system can not only dissipate energy and effectively control the maximum story displacement and story drift through the mass system but also mitigate the story's absolute acceleration via the isolation system,thereby reducing the input earthquake energy and structural damage.

关 键 词：质量减震消能系统 摩擦摆支座 调谐质量阻尼器 黏弹性材料 Simscape 

分 类 号：TU352.1[建筑科学—结构工程]