考虑经验结构信息的RC框架剪切层模型建立方法  

Establishment Method of Story-based RC Frame Shear Model Utilizing Empirical Structural Information

作　　者：杨植 刘洋 熊峰[1,2] 梅竹[1,2] YANG Zhi;LIU Yang;XIONG Feng;MEI Zhu(College of Architecture and Environment,Sichuan University,Chengdu 610065,China;Western China Earthquake and Hazards Mitigation Research Center,Sichuan University,Chengdu 610065,China)

机构地区：[1]四川大学建筑与环境学院,四川成都610065 [2]四川大学中国西部抗震防灾研究中心,四川成都610065

出　　处：《防灾减灾工程学报》2022年第6期1240-1247,共8页Journal of Disaster Prevention and Mitigation Engineering

基　　金：国家自然科学基金青年基金项目(51908384);中国博士后科学基金面上资助项目(2020M673223,2019M663500);四川省国际科技创新合作/港澳台科技创新合作项目(2019YFH0120)资助。

摘　　要：提出一种基于经验结构信息的RC框架剪切层模型建立方法,用于区域RC框架结构的地震损失快速评估。针对RC框架结构确定结构构件尺寸和材料参数等基本设计参数及其经验取值范围,通过拉丁超立方体抽样方法考虑这些参数的随机组合与参数值的不确定性,生成框架结构的随机样本;在RC框架整体结构层面将框架层结构随机样本转化为多自由度集中质量剪切层模型,再通过非线性动力分析得到结构地震响应数据;综合分析国内外规范对于结构损伤状态的定义与量化方法,结合地震响应数据对框架结构的地震损失进行评估。结果表明:①考虑结构设计参数经验取值建立的层结构模型,满足抗震设计规范要求,且符合实际结构特征,能够用于典型框架结构的快速建模;②在不同强度的地震激励下,框架结构模型的地震损失规律与震害经验基本一致,表明本文所提建模方法具有较高的模拟准确性。An establishment approach for story-based shear models using empirical structural information of RC frame structures is proposed for regional seismic loss estimation.Targeting RC frame structures,the basic design parameters,including structural dimensions and material parameters,and their empirical value ranges are determined.The Latin-Hypercube-Sampling method is adopted to generate samples of story-based structures considering the random combinations of these basic parameters and the parameter uncertainty induced by determining their empirical value ranges.The multi-degree-offreedom concentrated-mass story-based shear layer model is employed to build RC frame structural model corresponding to story-based structural model samples.The structural seismic responses are obtained by nonlinear dynamic analysis using these structural models.A group of structural damage states is quantificationally defined by a comprehensive analysis of the domestic and foreign codes,and seismic loss of typical RC frame structures is estimated in a case study.It is found that the proposed story-based structural models considering basic parameters,which meet the requirements of the code and are compatible with realistic structures,are available and efficient for the rapid modeling of typical frame structures.The structural seismic responses and seismic loss are consistent with the earthquake damage experience,indicating a high accuracy of the proposed modeling approach.

关 键 词：数值模拟 层模型 RC框架 经验信息 地震损失 

分 类 号：TU375[建筑科学—结构工程]