基于构件变形的钢筋混凝土结构地震损失评估方法研究  

Research on Seismic Loss Assessment Methods of Reinforced Concrete Structures based on Component Deformation

作　　者：曹源 CAO Yuan(Architectural Design&Research Institute of SCUT Co.,Ltd.,Guangzhou 510640,China)

机构地区：[1]华南理工大学建筑设计研究院有限公司,广州510641

出　　处：《华南地震》2021年第2期134-141,共8页South China Journal of Seismology

基　　金：广东省自然科学基金—面上项目:基于神经网络的区域框架结构震损预测(2020A1515010739)。

摘　　要：根据钢筋混凝土梁、柱、剪力墙的构件变形指标限值,建立了一套构件变形层次的地震损失评估方法,并给出了地震损失的计算方法和评估流程,基于PERFORM-3D开发了后处理程序实现该评估流程。利用该方法对不同设防烈度的常规框架-剪力墙结构进行评估,并分析了地震动强度、构件类型等因素的影响,对比评估结果后发现:文中的评估方法能够有效计算单体建筑物在各强度地震作用下构件和结构的期望损失;结构的抗倒塌安全储备系数CMR随着设防烈度的提高而降低,高设防结构承担的倒塌风险比低设防结构高;7.5度、8度和8.5度设防地区结构所承担的地震损失风险最高,7度设防结构次之,6度设防结构的地震损失风险最小。Based on the deformation performance index limits of RC beams,columns and shear walls,a set of seismic loss assessment method for component deformation levels was established.Its theory and assessment procedure were given and the post-processing program‘Loss-Calculation’were developed to achieve this process.Using this method,the conventional frame-shear wall structures with different fortification intensity were evaluated,and the effects of ground motion intensity,component types were analyzed.The evaluation results were compared,and it was found that:the post-processing program can effectively calculate the expected loss of components and structures of a single building under the earthquakes with different intensities.The collapse resistance safety factor CMR of the structure decreases with increasing fortification intensity,the collapse risk of the high fortification structure is higher than that of the low fortification structure.The earthquake loss risk of the 7.5 degree,8 degree and 8.5 degree fortified structure is the highest,followed by the 7 degree fortified structure,and the 6 degree structure has the lowest earthquake loss risk.

关 键 词：地震损失评估方法 框架-剪力墙结构 构件变形 不同设防烈度地区 

分 类 号：TU352.11[建筑科学—结构工程] TU375.4