It is important to select proper ground motions for obtaining accurate results from response history analyses. The purpose of this study is to propose an accurate and efficient method that does not require excessive computation for selecting and scaling ground motions to match target response spectrum mean and variance. The proposed method is conceptually simple and straightforward, and it does not use a simulation algorithm that requires a sophisticated subroutine program. In this method, the desired number of ground motions are sequentially scaled and selected from a ground motion library. The proposed method gives the best selection results using Sum of Square Error and has the smallest value(=0.14). Also, The accuracy and consistency of the proposed method are verified by comparing the selection results of the proposed method with those of existing methods.

1. 서 론
 2. 응답 스펙트럼의 평균과 분산을 고려한 배율조정계수 결정 방법 제안
  2.1 지반운동 응답 스펙트럼의 오차 평가 방법
  2.2 배율조정계수 결정 방법
 3. 지반운동 선정 및 배율 조정을 위한 방법 제안
  3.1 첫 번째 지반운동 선정방법
  3.2  j번째 지반운동 선정방법
 4. 지반운동 선정 결과
  4.1 배율조정 전/후의 지반운동 선정 결과
  4.2 Kottke and Rathje[7]와 Jayaram et al.[8]의 제안식에 따른 지반운동 선정 결과
  4.3 강진 및 약진에 대한 지반운동 선정 결과
 5. 결 론
 / REFERENCES /

• 하성진(한양대학교 건축공학과) | Ha Seong Jin
• 박미영(한양대학교 건축공학과) | Park Mi Yeong
• 한상환(한양대학교 건축공학과) | Han Sang Whan Corresponding author