基于易损性指数的钢筋混凝土框架结构地震损伤评估
发布时间：2019-03-24 11:40
【摘要】：在传统地震易损性分析的基础上,提出了易损性指数的概念,并用其来评估结构的地震损伤。通过引入群体结构震害评估中震害指数的概念,结合解析地震易损性分析得到的结构破坏状态概率,将震害指数的数学期望作为单体结构的易损性指数。选择8层和10层两组考虑不同抗震设防水平的钢筋混凝土框架结构为研究对象,分析得到结构的地震易损性曲线、破坏状态概率曲线、易损性指数曲线以及结构在小震、中震和大震作用下的易损性指数。分析结果表明:按我国抗震规范设计的钢筋混凝土框架结构基本可以满足"小震不坏"、"中震可修"和"大震不倒"的性能要求。在大震作用下,结构可以较好地控制较严重破坏的发生。随着抗震设防水平的提升,结构的抗震能力得到了加强,但结构在小震、中震和大震作用下的易损性指数却发生了增加。
[Abstract]:On the basis of traditional seismic vulnerability analysis, the concept of vulnerability index is proposed and used to evaluate seismic damage of structures. By introducing the concept of earthquake damage index in earthquake damage assessment of population structure, combined with the probability of structure failure state obtained from analytical seismic vulnerability analysis, the mathematical expectation of earthquake damage index is regarded as the vulnerability index of single structure. Two groups of reinforced concrete frame structures with different seismic fortification levels are selected as the object of study. The seismic vulnerability curve, the failure state probability curve, the vulnerability index curve and the small earthquakes of the structure are obtained. Vulnerability index of medium and large earthquakes. The analysis results show that the reinforced concrete frame structure designed according to the seismic code of our country can basically meet the performance requirements of "small earthquake is not bad", "moderate earthquake is repairable" and "large earthquake cannot fail". Under the action of large earthquake, the structure can better control the occurrence of more serious damage. With the improvement of the seismic fortification level, the seismic capacity of the structure has been strengthened, but the vulnerability index of the structure under the action of small earthquake, moderate earthquake and large earthquake has been increased.
【作者单位】： 结构工程灾变与控制教育部重点实验室(哈尔滨工业大学);哈尔滨工业大学土木工程学院;
【基金】：国家自然科学基金项目(51378162,51178150) 国家科技支撑计划课题项目(2013BAJ08B01) 中国博士后科学基金面上项目(2014M551251) 黑龙江省博士后面上基金项目(LBH-Z14114)
【分类号】：TU375.4;TU312.3
[Abstract]:On the basis of traditional seismic vulnerability analysis, the concept of vulnerability index is proposed and used to evaluate seismic damage of structures. By introducing the concept of earthquake damage index in earthquake damage assessment of population structure, combined with the probability of structure failure state obtained from analytical seismic vulnerability analysis, the mathematical expectation of earthquake damage index is regarded as the vulnerability index of single structure. Two groups of reinforced concrete frame structures with different seismic fortification levels are selected as the object of study. The seismic vulnerability curve, the failure state probability curve, the vulnerability index curve and the small earthquakes of the structure are obtained. Vulnerability index of medium and large earthquakes. The analysis results show that the reinforced concrete frame structure designed according to the seismic code of our country can basically meet the performance requirements of "small earthquake is not bad", "moderate earthquake is repairable" and "large earthquake cannot fail". Under the action of large earthquake, the structure can better control the occurrence of more serious damage. With the improvement of the seismic fortification level, the seismic capacity of the structure has been strengthened, but the vulnerability index of the structure under the action of small earthquake, moderate earthquake and large earthquake has been increased.
【作者单位】： 结构工程灾变与控制教育部重点实验室(哈尔滨工业大学);哈尔滨工业大学土木工程学院;
【基金】：国家自然科学基金项目(51378162,51178150) 国家科技支撑计划课题项目(2013BAJ08B01) 中国博士后科学基金面上项目(2014M551251) 黑龙江省博士后面上基金项目(LBH-Z14114)
【分类号】：TU375.4;TU312.3
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