摘要
通过Lagrange方程得到任意凹曲面滑道变摩擦系数RFPS(Rolling Friction Pendulum System)隔震结构体系的运动方程,并利用MATLAB软件建立求解程序。研究与分析结果表明:结构体系动力反应由于变摩擦系数的RFPS效果而变得复杂。变摩擦系数与较高的摩擦系数方案的减震效果类似,但其减震效果比较低摩擦系数方案中的有明显劣化。当滑块从低摩擦系数区过渡到高摩擦系数区,结构地震动力反应出现明显的"鞭梢效应",加速度增大明显。
According to Lagrange’s equation,the governing equation for a base isolated structural system derived,with a variable friction coefficient RFPS(Rolling Friction Pendulum System)bearing on arbitrary curves.Its solution is presented with software prepared from MATLAB language.The results show that variable friction coefficient RFPS might result in complication of structural dynamic responses.It is noticed that seismic mitigation efficiency for variable friction coefficient is close to high friction coefficient,but with notable disadvantages to lower friction coefficient.As RFPS slipper transits to high friction area from low friction area,the structural system could exhibit notable whipping effect,which will amplify storey accelerations.
作者
富腾
王兴国
张馨园
葛楠
Fu Teng;Wang Xing-guo;Zhang Xin-yuan;Ge Nan(College of Architecture Engineering,North China University of Science and Technology,Tangshan 063009,China)
出处
《工程抗震与加固改造》
北大核心
2021年第2期46-53,共8页
Earthquake Resistant Engineering and Retrofitting
基金
国家自然科学基金项目(51378170,51478162)
河北省重点项目(149654061)
关键词
隔震结构
滚动摩擦
上盘
非线性微分方程
龙格—库塔方法
seismic isolation structure
rolling friction
upper plate
energy non-linear differential equation
Longe-Kuta method
