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并联复合隔震体系的地震耗能机制和能量响应分析

, PP. 36-42

Keywords: 并联复合隔震,状态方程法,能量时程,摩擦承压比,摩擦系数

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Abstract:

运用能量分析法对并联复合隔震体系的地震耗能机制和能量响应进行了分析和探讨。首先,以层间剪切模型的多自由度运动微分方程为基础,建立了并联复合隔震体系的能量平衡方程。其次,引入状态空间法对并联复合隔震体系进行时程分析得到体系的地震响应,并以此为基础计算了各项能量。最后,以7质点多自由度体系为仿真对象,对并联复合隔震体系的耗能机制及其主要隔震层参数和不同特性地震动对能量响应的影响进行了分析。结果表明,并联复合隔震体系地震总输入能主要由滞回耗能和阻尼耗能承担;摩擦承压比和摩擦系数对能量响应有重要影响,存在最优取值区间;地震能量响应受地震动特性影响较大。

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