RC框架结构地震易损性分析方法研究进展

Recent development of seismic fragility analysis methods for RC frame structures

21世纪我国经济急速发展,人口也急剧增长,这也使得地震对人类生命和财产安全造成的威胁更大,结构抗震研究需求日益增加。地震易损性分析技术对于结构破坏和损失预测都有着非同一般的应用价值,因此受到了国内外土木工程抗震界的广泛关注和研究。首先介绍了地震易损性分析的基本概念,具体地论述了用于地震易损性分析的三种方法,同时总结出此三种方法各自的优缺点;其次以RC框架结构为例论述了国内外地震易损性分析领域的研究发展,从上个世纪90年代开始进行了系统的梳理和分析。说明了地震易损性分析在研究过程中由于不确定性的存在而导致对分析结果准确度的影响;最后指出要想得到更接近于真实的易损性分析结果,还需考量易损性分析中的不确定参数,揭示了地震易损性分析研究领域所面临的挑战。

In the 21st century,with the rapid development of China's economy and the rapid growth of population,the threat of earthquake to human life and property security becomes greater,and the demand for seismic research is increasing.Seismic fragility analysis technology is of great application for structural damage and loss prediction,so it has been widely concerned and studied by civil engineering seismic research communities.This paper first introduces the concept of seismic fragility analysis,then specifically discusses three methods for seismic fragility analysis and summarizes their advantages and disadvantages.Taking RC frame structure as an example,this paper discusses the research on seismic fragility analysis at home and abroad,and makes a systematic review since 1990s.This paper explains the influences on the accuracy of the analysis results due to the existence of uncertainties in the calculation process.Finally,in order to get more close results to the real fragility analysis results,it is necessary to consider the uncertain parameters in the fragility analysis,and the challenges faced in this research field are revealed.