Simplified method of analysis accounting for shear-lag effects in composite bridge decks

Gara, Fabrizio; Ranzi, Gianluca; Leoni, Graziano

doi:10.1016/j.jcsr.2011.04.013

Cited by 42 publications

(31 citation statements)

References 15 publications

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“…[116,117]. Considering the dependency of the effective widths on the loading conditions, a recent approach has suggested the use of the entire slab width for the analysis calculations, therefore relying on the effective width method only for the design and sizing of the composite section [118].…”

Section: Shear-lag Effects and Concrete Slab Effective Widthmentioning

confidence: 99%

State of the art on the time-dependent behaviour of composite steel–concrete structures

Ranzi

Leoni

Zandonini

2013

Journal of Constructional Steel Research

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Section: Shear-lag Effects and Concrete Slab Effective Widthmentioning

confidence: 99%

State of the art on the time-dependent behaviour of composite steel–concrete structures

Ranzi

Leoni

Zandonini

2013

Journal of Constructional Steel Research

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“…Vieira et al presented a higher order thin‐walled beam model for the analysis of thin‐walled structures considering cross section warping and shear deformations, and the formulation was derived from the corresponding elasticity governing equations by adopting an approximation of the beam displacement field over the cross section by a set of linearly independent basis functions that were refined according to the accuracy required for the representation of the three‐dimensional behavior of the structure, precisely indicating the displacement field of the cross section. Gara et al presented a model for the analysis of composite beams in which the constrained kinematics encompasses the overall shear deformability, warping of the slab cross section and of the steel beam and partial shear interaction between the slab and girder. The warping functions were obtained by considering the problem of unrestrained thin‐walled members subjected to self‐equilibrated elementary load schemes, showing the capability of the model to accurately describe both the global behavior of displacements and stress.…”

Section: Introductionmentioning

confidence: 99%

Analysis of flexural natural vibrations of thin‐walled box beams using higher order beam theory

Jiang

Zhou

et al. 2019

Structural Design Tall Build

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Summary In order to study the influence of high‐order shear deformations and shear lag on the dynamic characteristics of thin‐walled box beams (TWBBs), this paper takes the Hamilton principle as a basis to consider multiple factors such as high‐order shear deformations, shear lag, and cross section rotary inertia of the TWBBs. The vibration differential equations and natural boundary conditions of TWBBs are deduced. On the basis of eight examples of TWBBs with different boundary conditions and span–width ratios, analytical results of this paper are compared with those of the ANSYS finite element method. Both results are in good agreement with each other, and the validity of the calculation method is verified. The effects of higher order shear deformations and shear lag on natural vibration characteristics of TWBBs are analyzed. And some meaningful conclusions are drawn: This theory shows the capability to accurately describe both higher order deformations and shear lag; when the span–width ratio is small, neglecting higher order web deformations will produce a large calculation error; under the action of shear lag, the natural vibration frequency of TWBBs decreases greatly, which cannot be neglected; and both the high‐order shear deformations and shear lag effect increase with increasing mode order and increase with decreasing span–width ratio.

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“…Box girder is an important type of bridge structure. For box girder, many scholars have conducted research on shear lag, effective width [1][2][3][4][5], and live load distribution factors [6][7][8].…”

Section: Introductionmentioning

confidence: 99%

Numerical Investigation of Distribution Laws of Shear Force in Box Girder Webs

Xue

Zang

Zhou

et al. 2019

Advances in Materials Science and Engineering

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To study the shear force distribution laws of a box girder with a single-box multichamber (SB-MC) configuration for different supporting conditions, numbers of webs, stiffness of end diaphragm, and web thickness values, a box girder with SB-MC was numerically simulated using three-dimensional finite element model. According to the comparison results of web shear force, the concept of η, a shear-increased coefficient for webs, was introduced. The results show that supporting conditions and chambers have a significant impact on the shear-increased coefficient η, and end diaphragm must be set up in the 3D finite element model when calculating η. Nonlinear analysis shows that in the elastic phase, the shear-increased coefficient η basically does not change, but in the cracking stage, the coefficient η of each web changes with the degree of web cracking, and side-webs (S-Webs) reach the ultimate load first. The variation of the web thickness hardly affects the distribution of the shear force, so the method to adjust the web thickness of S-Web was proposed according to the result of shear-increased coefficient η to improve the shear resistance of the box girder.

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Simplified method of analysis accounting for shear-lag effects in composite bridge decks

Cited by 42 publications

References 15 publications

State of the art on the time-dependent behaviour of composite steel–concrete structures

State of the art on the time-dependent behaviour of composite steel–concrete structures

Analysis of flexural natural vibrations of thin‐walled box beams using higher order beam theory

Numerical Investigation of Distribution Laws of Shear Force in Box Girder Webs

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