Behavior of Steel Box Girders with Top Flange Bracing

Fan, Zhanfei “Tom”; Helwig, Todd A.

doi:10.1061/(asce)0733-9445(1999)125:8(829)

Cited by 22 publications

(15 citation statements)

References 2 publications

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“…Box sections can provide stability for long span bridges and allow large deck overhangs. The closed box section in the completed bridge has a torsion stiffness that may be 100 times to more than 1000 times the stiffness of a comparable I-girder section [7]. Also the inherent torsional rigidity of curved steel boxes permit shipping and erecting without external supports.…”

Section: Stress Distributionmentioning

confidence: 99%

Stress Distribution in Continuous Thin-Walled Multi-Cell Box Girder Bridges

Ezeokpube¹,

Osadebe²

2014

Nig. J. Tech.

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ABSTRACT ABSTRACTSeveral researchers have studied stresses in thin Several researchers have studied stresses in thin Several researchers have studied stresses in thin Several researchers have studied stresses in thin thin thin thin thin----walled multi walled multi walled multi walled multi----cell box girder bridges has not received much attention in published literature. Hence, this cell box girder bridges has not received much attention in published literature. Hence, this cell box girder bridges has not received much attention in published literature. Hence, this cell box girder bridges has not received much attention in published literature. Hence, this research investigated stress di research investigated stress di research investigated stress di research investigated stress distribution in continuous thin stribution in continuous thin stribution in continuous thin stribution in continuous thin girder bridges is complex and the complexity is even more when the box girder is continuous with multi girder bridges is complex and the complexity is even more when the box girder is continuous with multi girder bridges is complex and the complexity is even more when the box girder is continuous with multi girder bridges is complex and the complexity is even more when the box girder is continuous with multi modern trend in the analysis is to program the more straig modern trend in the analysis is to program the more straig modern trend in the analysis is to program the more straig modern trend in the analysis is to program the more straig Therefore, the analytical tool for this study is a MATLAB program developed by the authors for the finite strip Therefore, the analytical tool for this study is a MATLAB program developed by the authors for the finite strip Therefore, the analytical tool for this study is a MATLAB program developed by the authors for the finite strip Therefore, the analytical tool for this study is a MATLAB program developed by the authors for the finite strip analysis of continuous thin analysis of continuous thin analysis of continuous thin analysis of continuous thin----walled box girder bridges. Numerical study on stress distributio walled box girder bridges. Numerical study on stress distributio walled box girder bridges. Numerical study on stress distributio walled box girder bridges. Numerical study on stress distributio two box girder bridges. The first was a simply supported box girder bridge subjected to eight point loads which was two box girder bridges. The first was a simply supported box girder bridge subjected to eight point loads which was two box girder bridges. The first was a simply supported box girder bridge subjected to eight point loads which was two box girder bridges. The first was a simply supported box girder bridge subjected to eight point loads which was used primarily for comparison with literature. The result obtained by the program was in good agreement with used primarily for comparison with literature. The result obtained by the program was in go...

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Section: Stress Distributionmentioning

confidence: 99%

Stress Distribution in Continuous Thin-Walled Multi-Cell Box Girder Bridges

Ezeokpube¹,

Osadebe²

2014

Nig. J. Tech.

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“…and for y c k/2F≠0 it becomes al/2 -tg al/2= 2aF/k (6) and also from [1] (t-tg t)/t 3 = 16P E /π 2 kl (7) in which t= al/2 (8) and P E is the Euler buckling load of the compressed rod not braced. Numerically solving the (7) we obtain t and from (8)…”

Section: Stability Of An Elastically Braced Compressed Rodmentioning

confidence: 99%

“…We recall from the problem of the compressed rod elastically braced raised in [1] for different cases that was later taken, among others, in [2], [3], [4], [5] with reference to civil and industrial buildings and to steel bridges in [6] [7] [8] [9].…”

Section: Introductionmentioning

confidence: 99%

About Buckling of X-Type Bracing

Michele

2014

IJSTS

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Abstract:In X-type bracing structures generally it does not take into account the structural contribution of the compressed member, since it is assumed to have a negligible compressive strength; it considered that the stretched member takes the total stress. In the following we analyse as the stretched diagonal, joined in the middle to the compressed one, improves the structural behaviour of this both with respect to the buckling in-plane or out-of -plane of the structure. First we recall the link between the Euler buckling load of a rod free and braced depending on the stiffness k of the brace. Then we analyse the in-plane and out-of-plane buckling of the rod and, for the two situations, we value the increase of the buckling load due to the elastic brace. In the end for both cases we show in what condition the stretched rod causes that the compressed one buckles in the second mode.

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“…Fan and Helwig [2,3] made a considerable contribution to the understanding of the mechanics involved in lateral bracing systems and internal cross frames in quasi-closed box girders. After deriving general form equations for estimating the forces in both crossed diagonal type and single-diagonal-type lateral bracing systems induced by vertical bending and applied torque [2], bracing system.…”

Section: Introductionmentioning

confidence: 99%

“…After deriving general form equations for estimating the forces in both crossed diagonal type and single-diagonal-type lateral bracing systems induced by vertical bending and applied torque [2], bracing system. Kim and Yoo [6] also found that significant coupling actions occur between a single-diagonal-type lateral bracing system and internal K-frames placed at odd numbered panel spacing.…”

Section: Introductionmentioning

confidence: 99%