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采用非平稳的Kanai-Tajimi随机地震模型来描述实际的地面运动,利用Bouc-Wen光滑型滞变恢复力模型模拟隔震层和实际结构的本构特性,通过随机等效线性化方法对层间隔震结构的非线性双质点简化模型进行了参数敏感性分析。结果表明:层间隔震结构主要以改变结构的自振特性和通过隔震层的耗能来达到减震的目的,随着质量比的变化,减震机理的侧重点又有所不同。
The non-stationary Kanai-Tajimi stochastic seismic model is used to describe the actual ground motion. The Bouc-Wen smooth hysteretic restoring force model is used to simulate the constitutive properties of the isolation and actual structures. Stochastic equivalent linearization The parametric sensitivity analysis of the nonlinear two-mass point simplified model of seismic structure is carried out. The results show that the seismic isolation structure mainly aims to change the natural vibration characteristics of the structure and dissipate energy through the isolation layer. As the mass ratio changes, the focus of the damping mechanism is different.