结构大震弹塑性时程分析中的能量反应分析

Energy-based analysis in elastic-plastic time-history analysis of structure under large earthquake

采用ABAQUS对23个钢管混凝土框架-钢筋混凝土核心筒结构分析模型进行了大震弹塑性时程分析,分析模型变量为楼层总高度、地震波及地震波峰值加速度。通过对23个分析模型中得到的各种能量项数值的统计与分析,结合现行规范中结构损伤程度的评估标准,对输入能与地震加速度及结构损伤程度的关系、不同结构损伤程度下塑性耗能在构件中的分配、阻尼耗能比例和塑性耗能比例与结构损伤程度的关系进行了研究。研究成果为能量法在结构地震反应中的应用及钢管混凝土框架-核心筒结构体系的设计提供参考。

Elastic-plastic time history analyses of 23 CFST frame-reinforced concrete core wall structure models under large earthquake have been conducted by using ABAQUS,and the studied model variables include the total structural height,earthquake wave and peak acceleration of wave. Based on the statistical analysis of the energy items from 23examples and combined with the evaluation standard on structural damage degree in the present specifications,the relation between input energy and wave acceleration or structural damage degree,distribution of plastic energy dissipation in structural members under different structural damages,relations between the ratio of damping energy dissipation or plastic energy dissipation to input energy and the structural damage have been studied. Research results may provide references for the application of energy analysis method in structural seismic analysis as well as the design of CFST framecore wall structures.