Membrane forces acting on thin-walled box girders considering shear lag effect

Tang, Junqi; Li, Q.S.; Liu, G.D.; Wu, Jiawei

doi:10.1016/j.tws.2003.12.009

Cited by 14 publications

(2 citation statements)

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“…There is a vast amount of literature on this subject. The shear-lag effect has been studied by analytical methods [9][10][11], numerical methods [12][13][14] and experimental tests [11,15,16]. In particular, Evans and Taherian [17] opted for empirical equations to obtain normal stresses with the finite-stringer method, Wang and Rammerstorfer [18] adopted the finite strip method, Kristek et al resumed the biharmonic analysis of isolated flanged plates previously applied by [19], and Qin and Liu [20] studied box-girder bridges under uniform load by the Symplectic Elasticity method.…”

Section: Introductionmentioning

confidence: 99%

On the Use of the Effective Width for Simply Supported Generally Loaded Box-Girders

Pancella,

Luongo

2024

Applied Sciences

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A new method for evaluating the effective flange width of simply supported rectangular box-girders in bending is illustrated. It aims to overcome the lack in the literature of a general method able to supply the effective flange width for a general distribution of loads along the beam axis, not restricted, i.e., to the few cases reported in standard codes. The method consists of finding an analytical expression for the effective width under sinusoidal loads of arbitrary wavelength and combining the results in the framework of a Fourier analysis. The model allows investigating the shear-lag effects on displacements and stresses. The analytical formulation proposed is validated against numerical results supplied by refined Finite Element analyses.

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Section: Introductionmentioning

confidence: 99%

On the Use of the Effective Width for Simply Supported Generally Loaded Box-Girders

Pancella,

Luongo

2024

Applied Sciences

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“…In addition, the box girder is mainly subjected to bending under the action of moving live loads (cars, trains) and its own weight. Due to the thin-walled characteristics and the shear lag effect [14][15][16], the stress of the same section of the box girder is unevenly distributed. This will inevitably cause the carbonation and chloride ion erosion of the box girder structure to be a spatially non-uniform degradation mode.…”

Section: Introductionmentioning

confidence: 99%

Diffusion Behavior of Chloride Ions in Concrete Box Girder under the Influence of Load and Carbonation

Ying-long

Lin

2020

Materials

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In order to study the durability degradation characteristics of concrete box girder under load and carbonation and chloride ion erosion, a scale model of concrete box girder was made for experimental research. According to the test results, the diffusion characteristics of chloride ions in the concrete box girder under the coupling effect of load and carbon dioxide were analyzed. By revising the calculation formula of the existing chloride ion concentration considering multiple factors, a calculation model of chloride ion concentration considering the influence of carbonation was proposed, and the test results were verified. The results show that the chloride concentration of the box girder on the same cross section is non-uniformly distributed due to the shear lag effect and the spatial structure. After considering the effect of carbonation, the difference rate of the improved model proposed in this paper is generally within 10%. Compared with the original model, the difference rate is reduced by a maximum of 19%.

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