摘要
以软钢圆锥棒作为消能限位器,二硫化钼作为摩擦材料,采用连续Bouc-Wen模型来模拟限位器的非线性恢复力,建立不同自由滑移量的带限位器基础滑移隔震结构的MATLAB/Simulink仿真模型,分析了5层隔震框架结构在不同状态时的动力特性,以及不同加速度峰值下El Centro波和天津波激励时的地震反应,并与试验结果进行了对比。结果表明:由试验结果推出的结构原型频率值和位移值与数值模拟结果较为接近,且加速度放大系数的试验值和仿真值吻合也较好,MATLAB/Simulink较好地实现了滑移隔震结构的地震响应仿真分析。随着自由滑移量的增大,上部结构的加速度变化不大,层间位移始终较小,隔震层的相对位移逐渐增大,而限位器的最大变形逐渐减小。
In this paper,mild steel cone rod is taken as limit and energy dissipation device;molybdenum disulfide is used as friction material,Bouc-Wen model is used to describe the hysteretic characteristic of elastic-plastic bar limit,and MATLAB/Simulink simulation model of friction sliding isolation frame structure is established.The dynamic characteristics are analyzed in different states,and seismic response analysis for different peak ground acceleration at El Centro and Tianjin waves is successfully completed.The isolation layer displacement of pure sliding and the acceleration amplification factor of the seismic structure are compared with the test results.Results show that:the prototype values of frequency and displacement derived from the test results are close to the numerical simulation result,and the test value of acceleration amplification coefficient agrees well with the simulation value;MATLAB/Simulink has a good implementation of seismic response simulation analysis of sliding isolation structures.With the increase of free slippage,the acceleration value for each layer has little change roughly;the displacement between layers keeps small;the slippage of isolation layer increases gradually;but limit devices’deformation decreases gradually.
作者
展猛
张丽珍
陈秀云
Zhan Meng;Zhang Li-zhen;Chen Xiu-yun(College of Architecture Engineering,HuangHuai University,Zhumadian 463000,China;College of Mechnaical and Energy Engineering,HuangHuai University,Zhumadian 463000,China)
出处
《工程抗震与加固改造》
北大核心
2019年第3期59-65,共7页
Earthquake Resistant Engineering and Retrofitting
基金
国家自然科学基金项目(51678480)
河南省高等学校重点科研项目(19A560016)
