In this study, natural period formular is presented for a RC shear wall structure with H-, T-, and L-shaped wall sections. The natural period formular proposed by Goel and Chopra and adopted in ASCE 7-10 was modified by using the ratio of the flange and web wall area. The natural periods of structures with H-shaped wall were numerically obtained, the results indicated that the ASCE 7-10 could not consider the natural period variation according to the length of the flange wall, but the proposed formula could do. Especially, ASCE 7-10 estimated much longer periods than eigenvalue analysis, and this implies that conservative seismic design is difficult. The periods by eigenvalue analysis exist between the upper and lower bounds given by the proposed formula, and conservative design is possible by using the proposed lower bound value. In order to verity the effectiveness of the proposed method, actual residential buildings with various types of flange walls are considered. Ambient vibration tests, eigenvalue analyses, and nonlinear dynamic analyses were conducted and the periods were compared with the values by ASCE 7-10 and the proposed formula. The results showed that the proposed formula could estimate more accurately the periods than ASCE 7-10.

A B S T R A C T
 1. 서 론
 2. 국내⋅외 고유주기 산정식 연구현황
  2.1 국내 고유주기 산정식
  2.2 국외 고유주기 산정식
 3. 단일 벽체 해석을 통한 플랜지형 벽체 주기식
  3.1 기존 전단벽 구조물의 주기 산정식
  3.2 플랜지형 벽체 효과를 고려한 전단벽 구조물의 주기 산정식
 4. 철근 콘크리트 전단벽 공동주택 해석
  4.1 대상 구조물
  4.2 RC 전단벽 공동주택 해석 모델
  4.3 고유치해석 및 상시미진동 계측결과와의 비교
  4.4 RC 전단벽 공동주택 비선형 해석
 5. 결 론
 감사의 글
 REFERENCES

• 노지은(단국대학교 건축공학과) | Roh, Ji Eun
• 김중호(단국대학교 건축공학과) | Kim, Joong Ho
• 허무원(단국대학교 건축공학과) | Hur, Moo-Won
• 박태원(단국대학교 건축공학과) | Park, Tae Won
• 이상현(단국대학교 건축공학과) | Lee, Sang Hyun Corresponding author