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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.41 No.1
- 발행연도
- 2021.10
- 수록면
- 65 - 84 (20page)
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초록· 키워드
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Several methods derived for use on traditional concrete curved box girders (CBGs) are used in design practice. However, these typically consider only one elastic modulus and one shear modulus, and consequently cannot be applied directly to CBGs with corrugated steel webs (CSWs) due to the large shear deformations and small longitudinal stiffness of CSWs, while these shear deformations are small and usually ignored for common concrete webs. In this paper, firstly, the flexure-torsion governing differential equations considering the shear deformations and the accordion effect of CSWs, and the distortion governing differential equation considering the accordion effect of CSWs are derived for CBGs with CSWs. A practical method which can solve the deflections, torsional angles, distortional angles, stresses and internal forces of simple and continuous CBGs with intermediate diaphragms is proposed. Secondly, the results of a series of tests performed on three CBGs with CSWs, published test results, as well as finite element analysis results and theoretical results of straight box girders (SBGs) with CSWs are used to verify the correctness of the analytical method. The agreement between analytical, experimental and numerical results is good. Finally, a parametric analysis is conducted and the results show that: (a) the influence of shear deformations of CSWs on the deflections of CBGs with CSWs increases with increasing curvature radius R. For SBGs with CSWs, the deflections may increase by 30% when considering shear deformations. For CBGs with CSWs, the deflection increase ranges between 8% and 30% for concentrated loads depending on the curvature radius. (b) the distortional shear stress, which is small and typically neglected for CBGs with concrete webs, may be as big as, or larger than the flexural shear stress, and must be considered. The restrained torsional shear stress, which is also small and typically neglected for CBGs with concrete webs, can reach 9% of the flexural shear stress, and also must be considered.
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참고문헌 (36)
참고문헌 신청
ANSYS / 2012 / ANSYS User’s Manual Revision 12.1 / ANSYS Inc
X.C. Chen / 2015 / Flexural ductility of reinforced and prestressed concrete sections with corrugated steel webs / Computers and Concrete, An International Journal 16(4):625~642
Xia-chun Chen / 2016 / Prestressed concrete bridges with corrugated steel webs: Nonlinear analysis and experimental investigation / Steel and Composite Structures, An International Journal 21(5):1045~1067
Cheyrezy, M. / 1990 / Composite bridges with corrugated steel webs-Achievements and prospects / IABSE Symposium Brussels 1990: Mixed Structures, Including New Materials
Ding, Y. / 2014 / Experimental research on ultimate torsional strength of PC composite box-girder with corrugated steel webs under torsion combined with bending / Proceedings of the 23rd National Conference on Structural Engineering
X.C. Chen / 2015 / Flexural ductility of reinforced and prestressed concrete sections with corrugated steel webs / Computers and Concrete, An International Journal 16(4):625~642
Xia-chun Chen / 2016 / Prestressed concrete bridges with corrugated steel webs: Nonlinear analysis and experimental investigation / Steel and Composite Structures, An International Journal 21(5):1045~1067
Cheyrezy, M. / 1990 / Composite bridges with corrugated steel webs-Achievements and prospects / IABSE Symposium Brussels 1990: Mixed Structures, Including New Materials
Ding, Y. / 2014 / Experimental research on ultimate torsional strength of PC composite box-girder with corrugated steel webs under torsion combined with bending / Proceedings of the 23rd National Conference on Structural Engineering
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