安装粘弹性阻尼器的滞变结构抗震可靠度分析

Seismic reliability analysis of hysteretic structures with viscoelastic dampers

以Ｂｏｕｅ－Ｗｅｎ滞变恢复力模型模拟剪切型滞变结构的非线性特性，采用等价线性化建立了安装粘弹性阻尼器的滞变结构体系在地震作用下的随机响应计算方法，并在此基础上分别以结构的层间最大变形和阻尼器阻尼材料的最大剪切变形为结构和阻尼器的极限状态随机变量，探讨了剪切型滞变结构在安装粘弹性阻尼器后的抗震可靠度和阻尼器可靠度的计算方法。

This paper presents a practical method for determining the seismic reliability of hysteretic structures with viscoelastic dampers. The dynamic response of hysteretic shear beam type structures with viscoelastic dampers under random seismic excitation is first evaluated in the state space utilizing stochastic response analysis and equivalent linearization. By taking the maxi- mum interstory deflection as a measure of structural ultimate limit state and the maximum deformation of viscoelastic layer as a measure of damper ultimate licit state, the failure probabilities of the structure and viscoelastic damper are then estimated using the first-order reliability method. Finally, the proposed method is applied to a ten-story building with and withbout viscoelastic dampers. It is found that the reliability of the building is significantly im- proved by the installation of viscoelastic dampers.