【摘要】 基于系统化的集总参数模型表征土体动力特性,上部结构每层恢复力模型采用Takeda滞回模型,研究了地震动输入强度和土体剪切波速对消能减震结构损伤指数的影响。研究结果表明:无论是否考虑土-结构相互作用,随着结构阻尼比的增加,消能减震结构的损伤指数都得到了有效降低;考虑土-结构相互作用后,在峰值加速度为0.1g地震动作用下,非减震结构随着土体剪切波速的下降结构损伤指数基本不变,而对于消能减震结构,随着土体剪切波速的下降结构损伤指数会上升;当地震动峰值加速度增加到0.3g时,非减震结构与减震结构随着土体剪切波速的下降,结构损伤指数随之增大。更多还原

【Abstract】 The influence of soil-structure interaction(SSI) on Park-Ang damage index(PADI) of energy dissipating structures was investigated under seismic excitation.A systematic lumped-parameter model was used to represent dynamic impedance function of foundation-soil.The structure was assumed to be shear-type system which was based on the Takeda hysteretic model.Two parameters were used as the key parameters:peak ground motion acceleration of earthquakes and soil shear wave velocity.It is found in this study that,for the structures without energy dissipation devices,decreasing soil shear wave velocity has very little effect on PADI when peak ground motion acceleration is 0.1g.However,for the structures with energy dissipation devices,decreasing soil shear wave velocity increases PADI when peak ground motion acceleration is 0.1g.In additon,for the structures with energy dissipation devices and without energy dissipation devices,decreasing soil shear wave velocity increases PADI when peak ground motion acceleration is 0.3g.更多还原