摘要
基于金属阻尼器屈服强度较高且不能调控的不足,提出由低屈服点钢和普通碳素钢组成的复合型金属阻尼器。首先,将"最大刚度"和"满应力状态"同时作为优化目标对边缘镂空的钢板阻尼器进行拓扑优化,获得最优的阻尼器形状;然后,针对复合型金属阻尼器的受力特点建立偏心交叉支撑等效模型,得到阻尼器屈服强度和屈服位移的近似解析解。数值分析结果表明优化复合型金属阻尼器具有滞回曲线饱满且应力均匀的优点,且可按需求调控阻尼器的屈服强度。对装有复合型金属阻尼器的框架整体抗震减震能力进行弹塑性分析,结果表明复合型金属阻尼器的减震效果明显,而经过优化的金属阻尼器性能更加优越。
The traditional metal dampers have the disadvantages such as higher yield point and inadequate adjustability.To overcome these deficiencies,a compound mental damper which comprises the low yield point steel plates and common steel plates is presented.The optimization objectives including“maximum rigidity”and“full stress state”are proposed to obtain the optimal shape of compound mental damper.The numerical simulation results show that the compound mental damper has the advantages such as the full hysteresis performance and uniform stress state,and the integral yield point can be regulated.In view of the mechanical characteristic of the compound metal damper,the equivalent model of eccentric cross bracing is established,and the approximate analytical solution of the yield strength and the yield displacement is proposed.The nonlinear simulation analysis is carried out for the overall aseismic capacity of the frame structures with the compound mental damper.It is verified that the compound mental damper has better energy dissipation capacity and more superior seismic performance,especially for the damper with opt--mized shape.
作者
何浩祥
王小兵
张小福
HE Haoxiang;WANG Xiaobing;ZHANG Xiaofu(Beijing Key Laboratory of Earthquake Engineering and Structural Retrofit, Beijing University of Technology Beijing,100124,China)
出处
《振动．测试与诊断》
EI
CSCD
北大核心
2018年第5期890-896,1075,共8页
Journal of Vibration,Measurement & Diagnosis
基金
国家重点研发计划资助项目(2017YFC1500600)
国家自然科学基金资助项目(51478024)
关键词
阻尼器
减震控制
低屈服点钢
拓扑优化
满应力
metal damper
seismic control
low yield point steel
topology optimization
full stress
作者简介
第一作者:何浩祥,男,1978年5月生,博士、教授。主要研究方向为结构健康监测和减震控制。曾发表《基于参数识别的双向偏心结构TMD优化布置》(《振动、测试与诊断》2017年第37卷第4期)等论文。E-mail:hhx7856@163.com
