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논문 기본 정보
- 자료유형
- 학술저널
- 저자정보
- 저널정보
- 국제구조공학회 Structural Engineering and Mechanics, An Int'l Journal Structural Engineering and Mechanics, An Int'l Journal Vol.68 No.5
- 발행연도
- 2018.1
- 수록면
- 621 - 632 (12page)
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초록· 키워드
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Soft-story buildings have bottom stories much less rigid than the top stories and are susceptible to earthquake damage. Therefore, the seismic design specifications need strict design considerations in such cases. In this paper, a four-story building was investigated as a case study and the effects of X-braces elimination in its lower stories studied. In addition, the possibility of replacement of the X-braces in soft-stories with equivalent moment resisting frame inspected in two different phases. In first phase, the stiffness of X-braces and equivalent moment-resisting frames evaluated using classic equations. In final phase, diagonals removed from the lowest story to develop a soft-story and replaced with moment resisting frames. Then, the seismic stiffness variation of moment-resisting frame evaluated using nonlinear static and dynamic analyses. The results show that substitution of braced frames with an equivalent moment-resisting frame of the same stiffness increases story drift and reduces energy absorption capacity. However, it is enough to consider the needs of building codes, even using equivalent moment resisting frame instead of X-Braces, to avoid soft-story stiffness irregularity in seismic design of buildings. Besides, soft-story development in the second story may be more critical under strong ground excitations, because of interaction of adjacent stories.
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참고문헌 (35)
참고문헌 신청
2010 / ANSI/AISC341, Seismic Provisions for Structural Steel Buildings / American Institute of Steel Construction, Inc.
2010 / ANSI/AISC360, Specification for Structural Steel Buildings / American Institute of Steel Construction, Inc.
2010 / ANSI/ASCE7, Minimum Design Loads for Buildings and other Structures / American Society of Civil Engineering
1996 / ATC-40, Seismic Evaluation and Retrofit of Concrete Buildings / Applied Technology Council
Chintanapakdee, C. / 2004 / Seismic response of vertically irregular frames : Response history and modal pushover analyses / J. Struct. Eng 130(8):1177~1185
2010 / ANSI/AISC360, Specification for Structural Steel Buildings / American Institute of Steel Construction, Inc.
2010 / ANSI/ASCE7, Minimum Design Loads for Buildings and other Structures / American Society of Civil Engineering
1996 / ATC-40, Seismic Evaluation and Retrofit of Concrete Buildings / Applied Technology Council
Chintanapakdee, C. / 2004 / Seismic response of vertically irregular frames : Response history and modal pushover analyses / J. Struct. Eng 130(8):1177~1185
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