高阻尼厚层橡胶支座力学性能试验研究  

Experimental research on mechanical properties of high damping thick rubber bearings

作　　者：匡成钢 谭平[1] 陈睦锋 李志祥 罗昊杰 KUANG Cheng-gang;TAN Ping;CHEN Mu-feng;LI Zhi-xiang;LUO Hao-jie(School of Civil Engineering,Guangzhou University,Guangzhou 510006,China;School of Civil Engineering,Guangzhou Institude of Science and Technology,Guangzhou 510540,China;Zhen’an Technology Co.,Ltd.,Kunming 650217,China;Shanghai Xinlan Real Estate Development Co.,Ltd.,Shanghai 200071,China)

机构地区：[1]广州大学土木工程学院,广东广州510006 [2]广州理工学院建筑工程学院,广东广州510540 [3]震安科技股份有限公司,云南昆明650217 [4]上海新兰房地产开发有限公司,上海200071

出　　处：《振动工程学报》2024年第9期1584-1592,共9页Journal of Vibration Engineering

基　　金：国家重点研发计划资助项目(2021YFC3100701);国家自然科学基金资助项目(51978185)。

摘　　要：为探究高阻尼厚层橡胶支座的力学性能,本文通过研究高阻尼厚层橡胶支座在竖向压应力作用下的水平剪切及竖向压缩的受力特征,建立了考虑水平剪切变形的力学模型,并提出了基于压应力变化的竖向刚度修正理论。为验证理论模型的准确性,分别设计了3种不同第一形状系数的高阻尼厚层橡胶支座来进行水平拟静力剪切和竖向压缩试验。结果表明:高阻尼厚层橡胶支座的等效水平刚度、等效阻尼比随内部钢板对橡胶的约束作用的变化而变化,在水平拟静力试验下,随支座水平剪切变形的增加呈现出先减小后增大的变化趋势,且随着竖向压应力的增大,水平等效刚度逐渐减小;在竖向压缩试验中,随着竖向压力的增大,竖向压缩刚度呈现非线性强化特征。通过理论与试验结果的对比分析可知:本文构建的水平剪切变形的力学模型可较好地描述高阻尼厚层橡胶支座水平剪切的力学性能,竖向刚度修正理论可以准确计算其竖向刚度,不同工况下与试验结果的偏差均在5%以内。In order to explore the mechanical properties of high-damping thick-layer rubber bearings,this paper studies the force characteristics of horizontal shear and vertical compression of high-damping thick-layer rubber bearings under vertical compressive stress.A model considering horizontal shear deformation is established,and a vertical stiffness correction theory is proposed based on compressive stress changes.To verify the accuracy of the theoretical model,three types of high-damping thick-layer rubber bear⁃ings with different first shape coefficients were designed for horizontal quasi-static shear and vertical compression tests.The results show that the equivalent horizontal stiffness and equivalent damping ratio of the high-damping thick-layer rubber bearing are changed by the restraint effect of the internal steel plate.As the vertical compressive stress increases,the horizontal equivalent stiff⁃ness gradually decreases.In the vertical compression test,as the vertical pressure increases,the vertical compressive stiffness pres⁃ents nonlinear strengthening characteristics.Through the comparative analysis of theoretical and experimental results,it can be seen that the mechanical model of horizontal shear deformation constructed in this paper can better describe the mechanical proper⁃ties of high-damping thick-layer rubber bearing in horizontal shear,and the vertical stiffness correction theory can accurately calcu⁃late its vertical stiffness.The deviations from the test results under different working conditions are all within 5%.

关 键 词：高阻尼厚层橡胶支座 压应力相关性 剪应变相关性 试验研究 力学性能 

分 类 号：TU352.12[建筑科学—结构工程]