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为了更好地服务于城市抗震防灾规划,研究典型钢筋混凝土(RC)框架结构建筑群体震害矩阵,形成初步适用于群体震害预测的方法。建立设防烈度分别为6,7,8度的3层典型框架结构和设防烈度为7度下的3,6,9层的典型框架结构模型,然后在动力增量时程分析(IDA)方法的基础上,分析各框架结构在不同地震作用下的破坏规律。最终得到各框架结构在地震作用下的易损性曲线和震害矩阵。结果表明,各破坏状态下的易损性曲线符合对数正态函数分布;典型框架结构随着抗震设防烈度的提高,抗地震破坏能力增加;随着层数的增加,抗地震破坏能力减弱。
In order to better serve the urban seismic disaster prevention planning, the seismic damage matrix of a typical reinforced concrete (RC) frame structure building group is studied to form a preliminary method that is suitable for the group earthquake damage prediction. The typical three-story frame structure with the fortification intensity of 6, 7 and 8 degrees respectively and the typical 3, 6 and 9-layer frame structure with the fortification intensity of 7 degrees are established. Then, in the dynamic incremental time history analysis (IDA) Based on the analysis of the failure of the framework of the structure under different earthquakes. Finally, the vulnerability curves and seismic damage matrix of each frame structure under earthquake action are obtained. The results show that the fragility curves of each failure state are in accordance with the logarithm normal distribution. With the increase of seismic fortification intensity, the typical frame structure increases the anti-earthquake damage ability. With the increase of the number of layers, the anti-earthquake damage ability is weakened.