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논문 기본 정보
- 자료유형
- 학술저널
- 저자정보
- 저널정보
- 국제구조공학회 Steel and Composite Structures, An International Journal Steel and Composite Structures, An International Journal Vol.38 No.4
- 발행연도
- 2021.1
- 수록면
- 415 - 430 (16page)
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초록· 키워드
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The effective flange width was usually introduced into elementary beam theory to consider the shear lag effect in steel-concrete composite beams. Previous studies have primarily focused on the effective width under positive moments and elastic loading, whereas it is still not clear for negative moment cases in the normal service stages. To account for this problem, this paper proposed simplified formulas for the effective flange width and reinforcement stress of composite beams under negative moments in service stages. First, a 10-degree-of-freedom (DOF) fiber beam element considering the shear lag effect and interfacial slip effect was proposed, and a computational procedure was developed in the OpenSees software. The accuracy and applicability of the proposed model were verified through comparisons with experimental results. Second, a method was proposed for determining the effective width of composite beams under negative moments based on reinforcement stress. Employing the proposed model, the simplified formulas were proposed via numerical fitting for cases under uniform loading and centralized loading at the mid-span. Finally, based on the proposed formulas, a simplified calculation method for the reinforcement stress in service stages was established. Comparisons were made between the proposed formulas and design code. The results showed that the design code method greatly underestimated the contribution of concrete under negative moments, leading to notable overestimations in the reinforcement stress and crack width.
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참고문헌 (29)
참고문헌 신청
C. Amadio / 2002 / Effective width evaluation for steel–concrete composite beams / Journal of Constructional Steel Research 58(3):373~388
C. Amadio / 2004 / Experimental evaluation of effective width in steel–concrete composite beams / Journal of Constructional Steel Research 60(2):199~220
CEB-FIP / 2010 / Model Code 2010, First complete draft, vol. 1, International Federation for Structural Concrete (fib)
Stuart S. Chen / 2007 / Proposed Effective Width Criteria for Composite Bridge Girders / Journal of Bridge Engineering 12(3):325~338
Chiewanichakorn, M. / 2004 / Effective flange width definition for steel-concrete composite bridge girder / J. Struct. Eng 130(12):2016~2031
C. Amadio / 2004 / Experimental evaluation of effective width in steel–concrete composite beams / Journal of Constructional Steel Research 60(2):199~220
CEB-FIP / 2010 / Model Code 2010, First complete draft, vol. 1, International Federation for Structural Concrete (fib)
Stuart S. Chen / 2007 / Proposed Effective Width Criteria for Composite Bridge Girders / Journal of Bridge Engineering 12(3):325~338
Chiewanichakorn, M. / 2004 / Effective flange width definition for steel-concrete composite bridge girder / J. Struct. Eng 130(12):2016~2031
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