超高层钢-混凝土混合结构地震损伤模型研究

摘要

Based on seismic damage distribution characteristics and evolution law of different types of structural components in a typical ultra-tall steel-concrete composite building structure,a seismic damage model at a story level was proposed for a steel reinforced concrete frame-concrete tube composite structure considering different importances of different types of components.Then,based on the above model,combining the weighting coefficients of story position and damage index,the global damage model reflecting the distribution characteristics of story damage was established.At last, as a case study,the nonlinear earthquake responses of a steel-concrete composite structure was calculated with the aid of PERFORM-3D software,the features of damage distribution and evolution were analyzed,and the damage indices of individual story level were determined with the damage model proposed here,the reasonability of the damage model was verified.%以型钢混凝土框架-混凝土核心筒结构为研究对象，考虑不同类型构件在某典型超高层钢-混凝土混合结构中的地震损伤分布特点及损伤演化规律，建立了考虑不同类型构件重要性的钢-混凝土混合结构楼层地震损伤模型，并基于提出的楼层地震损伤模型，选取了位置权重系数和损伤值权重系数二者组合的形式，建立了能够反映钢-混凝土混合结构楼层损伤分布规律的整体结构损伤模型。并通过PERFORM-3D软件对一钢-混凝土混合结构进行了非线性地震反应计算，分析了该结构在地震作用下的损伤分布规律和损伤发展情况，利用本文提出的地震损伤模型对结构各层次的地震损伤指标进行了计算，验证了该损伤模型的合理性。