The vertical design spectrum for Korea, which is known to belong to an intra-plate region, is developed from the ground motion records of the earthquakes occurred in Korea and overseas intra-plate regions. From the statistical analysis of the vertical response spectra, a mean plus one standard deviation spectrum in lognormal distribution is obtained. Regression analysis is performed on this curve to determine the shape of spectrum including transition periods. The developed design spectrum is valid for the estimation both spectral acceleration and displacement. The ratio of vertical to horizontal response spectrum for each record is calculated. Statistical analysis of the ratios rendered the vertical to horizontal ratio (V/H ratio). Subsequently the ratio between the peak vertical ground acceleration to the horizontal one is obtained.

1. 서 론
 2. 수직설계스펙트럼에 관한 외국 기준
  2.1 미국 원자력 시설의 설계 기준에서의 관련 규정
  2.2 미국 NEHRP(2009)[5]에서의 규정
  2.3 Eurocode 8[4]에서의 규정
 3. 지진 목록과 분류
 4. 분석 방법과 절차
  4.1 V/H 비 계산
  4.2 수직설계스펙트럼을 구하기 위한 통계분석
 5. 분석 결과
  5.1 V/H 비
  5.2 수직설계스펙트럼의 형상
  5.3 수직설계스펙트럼
 6. 국내외 기준과의 비교
  6.1 국외기준과의 비교
  6.2 국내 기준과의 비교
 7. 결 론
 / REFERENCES /

• 김재관(서울대학교 건설환경공학부) | Kim Jae Kwan
• 김정한(한국원자력연구원 종합안전평가부) | Kim Jung Han
• 이진호(부경대학교 해양공학과) | Lee Jin Ho
• 허태민(서울대학교 건설환경공학부) | Heo Tae Min Corresponding author