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为研究隔震层刚度对基础隔震结构隔震情况的影响,以寻求最优隔震层刚度。在一多层简单钢筋混凝土框架结构的基底设置摩擦系数为0.05的摩擦滑移隔震钢板,采用SAP2000建模和分析。比较了首层柱子底部做成刚性底板与否的隔震情况,也比较了在不同隔震层刚度下结构的隔震情况。研究结果表明:设有刚性底板的隔震结构能有效控制基底最大滑移量。所选结构在隔震层刚度为2 000 kN/m时隔震效果最佳,降低了结构在地震中的峰值反应如自振周期、层间位移、层间剪力和加速度反应,某些减震率甚至超过90%。
In order to study the influence of isolation stiffness on the isolation of base isolation structure in order to find the optimal stiffness of isolation layer. In a multi-story simple reinforced concrete frame structure with a friction coefficient of 0.05 on the base of the sliding friction isolation steel plate, using SAP2000 modeling and analysis. The isolation conditions of the rigid floor at the bottom of the first floor pillars are compared, and the isolation of the structure under different stiffness of the isolation layer is also compared. The results show that the isolation structure with rigid floor can effectively control the maximum slip of the substrate. The selected structure has the best isolation effect when the stiffness of the isolation layer is 2 000 kN / m, which reduces the peak response of the structure in the earthquake such as natural period, interlayer displacement, interlaminar shear force and acceleration response, and some decreases The rate is even over 90%.