串联隔震体系水平刚度的参数研究  

Parametric analysis and calculation formula for horizontal stiffness of a series isolation system

作　　者：杜永峰[1,2] 吴忠铁[1] 范萍萍[3] 

机构地区：[1]兰州理工大学防震减灾研究所,兰州730050 [2]兰州理工大学西部土木工程防灾减灾教育部工程研究中心,兰州730050 [3]兰州工业学院,兰州730050

出　　处：《振动与冲击》2013年第23期64-68,74,共6页Journal of Vibration and Shock

基　　金：国家自然科学基金(50978130);甘肃省科技支撑项目(090-GKCA040)

摘　　要：考虑串联隔震体系中叠层橡胶支座和钢筋混凝土柱相互作用,用弯剪模型进行分析,用直接积分法推导了在压剪作用下串联隔震体系中叠层橡胶支座和钢筋混凝土柱及整体的水平刚度方程,提出了串联隔震体系刚度的简化方程,并与Kelly提出的公式进行了对比,主要分析了典型参数高度比κ和轴力影响因数σR对于构件自身及整体水平刚度的影响,结果表明随着典型参数的增大水平刚度降低,整体简化方程与整体精确方程的值在一定的范围内误差较小,满足工程实际要求。Taking the interaction between a laminated rubber bearing and a reinforcement concrete column in a series isolation system into account, the calculation formulas for horizontal stiffnesses of the laminated rubber bearing, the column and the series isolation system itself under action of axial forces and share forces were derived with the direct integration method, and were analyzed with a shear bending model. Their simplified calculation formulas were proposed and compared with the calculation formulas presented by Kelly. The influences of the typical parameters including the height ratio κ and the axial force factor σR on the components and the series isolation system were analyzed, respectively. The results showed that the horizontal stiffness of the system decreases with increase in the typical parameters κ and σR, the value of the simplified calculation formula is close to that of the accurate calculation formula of the series isolation system derived in a certain range, and the former satisfies the engineering requirements.

关 键 词：串联隔震体系 直接积分法 弯剪模型 水平刚度 典型参数 简化方程 

分 类 号：TU352.1[建筑科学—结构工程]