【摘要】 针对区域建筑的地震易损性分析，提出了能够反映弯剪耦合效应的结构简化计算模型。同时，考虑地震动随机性的影响，建立了基于物理随机地震动模型的地震易损性分析方法。研究结果表明：本文提出的结构简化计算模型具有模型参数少、计算速度快、能够准确反映弯剪耦合响应的特点。同时，基于物理随机地震动模型，结合概率密度演化理论开展建筑结构的地震易损性分析，相比传统方法更能精细和全面地反映地震动随机性对建筑结构损伤特征的影响。这一工作为区域建筑的地震易损性分析提供了新思路。更多还原

【Abstract】 A simplified structural model was proposed in this study to reflect the bending and shear coupling effect for the seismic fragility analysis of building structures at regional scale. Meanwhile,a seismic fragility analysis method was established based on the physical random ground motion model in consideration of the influence of random ground motions. The results show that the simplified structural model proposed in this study takes the advantage of few model parameters,fast calculation capability,and accurate representation of bending-shear coupling effect. Meanwhile,using the physical random ground motion model and probability density evolution theory to perform the seismic fragility analysis of building structures could reflect the effect of random ground motion on the structural seismic damage more precisely and completely when compared with the traditional approaches. This study provides an alternative for the seismic fragility analysis of building structures at regional scale.更多还原