PDF Interpolation Technique for Seismic Fragility Analysis

지진취약도 분석을 위한 확률밀도함수 보간 기법

Yi, Jin-Hak;Kim, Sang-Hoon;Yun, Chung-Bang;Kushiyama, Shigeru
이진학;김상훈;윤정방

  • Published : 2004.03.31

Abstract

This study proposes the Probability Density Function (PDF) interpolation technique to evaluate the seismic fragility curves as a function of the return period. Seismic fragility curves have been developed as a function of seismic intensities such as peak ground acceleration, peak ground velocity, and pseudo-velocity spectrum. The return period of design earthquakes, however, can be more useful among those seismic intensity measurements, because the seismic hazard curves are generally represented with a return period of design earthquakes and the seismic design codes also require to consider the return period of design earthquake spectrum for a specific site. In this respect, the PDF interpolation technique is proposed to evaluate the seismic fragility curves as a function of return period. Seismic fragility curves based on the return period are compared with ones based on the peak ground acceleration for the bridge model.

원자력발전소에 대한 지진안전성 분석을 위하여 개발된 지진취약도 곡선은 최근에는 교량 등의 토목구조물에도 적용되어 내진성능을 합리적으로 평가하기 위한 척도로 사용되고 있다. 이러한 지진취약도 곡선을 분석하는 데에는 주로 지진의 최대지반 가속도, 최대지반속도 등의 기준이 사용되었으나, 지진의 반복주기에 대하여 지진취약도를 분석한 예는 없다. 이 연구에서는 구조물의 지진취약도를 지진의 반복주기에 대하여 평가하고자 하였다. 이를 위하여 확률밀도함수 보간기법을 제안하였으며, 이 제안방법에 의하여 기존 문헌에 제시된 예제구조물을 대상으로 지진취약도를 분석하였고, 그 결과를 기존 연구결과와 비교하였다.

Keywords

References

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