Experimental studies on shear lag of box girders

Luo, Qi; Wu, You Ming; Tang, Junqi; Li, Qiusheng

doi:10.1016/s0141-0296(01)00113-4

Cited by 36 publications

(15 citation statements)

References 14 publications

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“…According to the displacement compatibility at the intersection of the web and top flange, the following equations are obtained where z 0 denotes the z-coordinate of the intersections of the concrete slab and web and z 3 denotes the z-coordinate of the bottom slab. Although most scholars preferred the cubic parabola, [34][35][36][37] Zhang and colleagues 2,3,7 demonstrated that a quadratic parabola was reasonable as the displacement function for shear-lag warping by investigating the in-plane shear deformation of flanges. Based on the previously mentioned boundary conditions, the displacement function for shear-lag warping of the top slab, cantilever slab, bottom slab, and web can be approximated by four quadratic parabolic equations as…”

Section: Displacement and Strain Models Of Twbgsmentioning

confidence: 99%

“…Although most scholars preferred the cubic parabola, [34][35][36][37] Zhang and colleagues 2,3,7 demonstrated that a quadratic parabola was reasonable as the displacement function for shear-lag warping by investigating the in-plane shear deformation of flanges. Based on the previously mentioned boundary conditions, the displacement function for shear-lag warping of the top slab, cantilever slab, bottom slab, and web can be approximated by four quadratic parabolic equations as…”

Section: Displacement and Strain Model Of Twbgmentioning

confidence: 99%

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Improved finite beam element method for analyzing the flexural natural vibration of thin-walled box girders

Jiang

Lai

Zhou

2017

Advances in Mechanical Engineering

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This study establishes the improved element stiffness and mass matrices of the thin-walled box girder, using a cubic Hermite polynomial shape function and based on an improved displacement function for shear-lag warping meeting the axial equilibrium condition of shear-lag warping stress and the consistency requirements of the displacement function. The improved thin-walled box girder element comprehensively considers multiple influencing factors, such as the thinwalled box girder shear-lag effect, shear deformation, and rotational inertia. The element shape function has first-order continuity at the element interface and satisfies the calculation precision with relatively few degrees of freedom. A finite beam element method program that can be used to calculate the natural vibration frequencies of thin-walled box girders was compiled based on the improved thin-walled box girder element. This program was used to calculate the natural vibration frequencies of many thin-walled box girder samples with different span-width ratios, span-height ratios, and boundary conditions. After comprehensively considering the influencing factors, the calculation results obtained from finite beam element method are in good agreement with those obtained from an ANSYS finite element calculation, thus demonstrating the rationality and validity of the improved thin-walled box girder element stiffness matrix and mass matrix proposed in this study. Finally, factors influencing the thin-walled box girder shear-lag effect and shear deformation were analyzed, providing relevant reference for project designers.

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Section: Displacement and Strain Models Of Twbgsmentioning

confidence: 99%

Section: Displacement and Strain Model Of Twbgmentioning

confidence: 99%

Improved finite beam element method for analyzing the flexural natural vibration of thin-walled box girders

Jiang

Lai

Zhou

2017

Advances in Mechanical Engineering

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“…al. [11] investigated the shear lag phenomenon of box girders using three Perspex glass models. The experiments addressed two issues, the beam-column action and the effect of varying depth upon the shear lag of box girders.…”

Section: Background Of Studymentioning

confidence: 99%

Numerical and Experimental Modeling of the Static Response of Simply Supported Thin-Walled Box Girder Bridges

Ezeokpube

Singh²,

Osadebe

2015

Nig. J. Tech.

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This paper presents numerical and experimental modeling of the static response of simply supported thin This paper presents numerical and experimental modeling of the static response of simply supported thin This paper presents numerical and experimental modeling of the static response of simply supported thin This paper presents numerical and experimental modeling of the static response of simply supported thin-walled walled walled walled reinforced concrete box girder bridges. The work is executed to verify the validity of reinforced concrete box girder bridges. The work is executed to verify the validity of reinforced concrete box girder bridges. The work is executed to verify the validity of reinforced concrete box girder bridges. The work is executed to verify the validity of software software software software developed by the developed by the

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“…Given that the box girder of the Pujayo Viaduct is thin walled, shear lag effects in the horizontal slabs cannot be disregarded [12]. Longitudinal normal stresses in the top deck and the bottom slab are largest at the webs and decrease non-linearly with the distance from them.…”

Section: Horizontal Bending Owing To Shear Lagmentioning

confidence: 99%

Unusual structural effects in a variable-depth box girder bridge: The Pujayo viaduct

Ramos

Schanack

Ortega³

et al. 2011

Engineering Structures

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Experimental studies on shear lag of box girders

Cited by 36 publications

References 14 publications

Improved finite beam element method for analyzing the flexural natural vibration of thin-walled box girders

Improved finite beam element method for analyzing the flexural natural vibration of thin-walled box girders

Numerical and Experimental Modeling of the Static Response of Simply Supported Thin-Walled Box Girder Bridges

Unusual structural effects in a variable-depth box girder bridge: The Pujayo viaduct

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