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좌굴방지가새가 설치된 철골건물의 초과강도계수

Overstrength Factors of Buckling Restrained Braced Frames

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키워드

주제분류토목공학

초록

본 논문에서는 좌굴방지 가새 (BRBF)가 설치된 중저층 철골조 구조물의 초과강도계수를 평가하였다. 해석 모델의 설계변수로는 건물의 층 수, 경간의 길이, 가새의 항복강도, 지진하중의 크기, 반응수정계수 등 다양하게 설정하였다. 초과강도계수는 ATC-19에서 제시하고 있는 방법에 따라 정적 비탄성해석을 이용하여 산정하였다. 해석결과에 따르면 본 연구에서 구한 BRBF의 초과강도계수는 AISC/SEAOC에서 BRBF에 관하여 제시한 초과강도계수 값보다 전체적으로 크게 나타났다.

Abstract

In this study the overstrength factors of medium to low-rise bucking restrained braced frames (BRBF) were evaluated. Various design variables, such as number of stories, span length, yield strength of the brace, level of earthquake load, and the response modification factors. The overstrength factors were obtained using the nonlinear static analysis following the procedure proposed by ATC-19. According to the analysis results, the overstrength factors obtained from this study were generally larger than those proposed in 'AISC/SEAOC Recommended Provisions for BRBF'.

참고문헌 (14)

  1. "Reccomended Provision for BRBF" (2001)
  2. "International Building Code" (2000), International Code Council
  3. "Strength and ductility considerations in seismic design" (1990)
  4. "and factors for building seismic provisions Journal of Structural Engineering", 119(1), pp.19~28 (1991)
  5. "Ductility and overstrength of moment frames", pp.439~446 (1999)
  6. "Overstrength and ductility factors for steel frames designed according to BS 5950", 129(8), pp.1019~1035 (2003)
  7. "Structural response modification factors", pp.5~32 (1995), ATC-19, Applied Technology Council
  8. "Pseudo dynamic tests of a full-scale CFT", BRB composite frame: displacement based seismic design and response evaluations, 2004., ~
  9. "Seismic Provisions for Structural Steel Buildings" (2002), AISC
  10. "stability analysis and characterization of buckling restrained unbonded braces University of California at Berkeley" (2002)
  11. "Subassemblage testing of corebrace buckling-restrained braces" (2003)
  12. "Static and Dynamic Analysis of Plane Structure University of California" (1993)
  13. "Prestandard and Commentary for The Seismic Rehabilitation of Building" (2000)
  14. "Component testing, stability analysis and characterization of buckling restrained braces" (2002), Final Report to Nippon Steel Corporation

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