Stress concentration due to shear lag in continuous box girders

Sa-nguanmanasak, Jaturong; Chaisomphob, Taweep; Yamaguchi, Eiki

doi:10.1016/j.engstruct.2006.08.010

Cited by 31 publications

(15 citation statements)

References 7 publications

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“…It is worth noting that the laws of the variation of the shear lag factor of two load cases 1 and 2 are different. It can confirm that the loading condition, which is not mentioned in the standard [2][3][4], is also one factor affecting shear lag [33,34]. Sapountzakis and Dikaros [40] analyzed the problem based on BEM with (Model B) and without (Model A) shear stress correction and compared with the result obtained from 3D solid simulation by FEMAP commercial software.…”

Section: Examplementioning

confidence: 86%

“…Dikaros and Sapountzakis [27] proposed an advanced beam theory to analyze the composite beam with arbitrary cross-section using the Boundary Element Method (BEM). Lewiński and Czarnecki [28] constructed the new first-order warping function, which integrated with the theories of Vlasov [22], El Fatmi [23,24], Kim and Kim [29], Librescu and Song [30], and Timoshenko [31,32] to compose the theories of straight elastic bars Some authors, Sa-nguanmanasak et al [33], Yamaguchi et al [34], developed the 3D model to examine the shear lag phenomenon. However, the solution using shell or solid elements is still not more flexible and computationally efficient than determining the stress on the cross-section by superimposition technique, 2D cross-section, and 1D beam element.…”

Section: Introductionmentioning

confidence: 99%

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Shear Lag Analysis due to Flexure of Prismatic Beams with Arbitrary Cross-Sections by FEM

Tran¹,

Navrátil²

2021

Period. Polytech. Civil Eng.

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This paper presents the use of a finite element method (FEM) to analyze the shear lag effect due to the flexure of beams with an arbitrary cross-section and homogeneous elastic material. Beams are constrained by the most common types of supports, such as fixed, pinned, and roller. The transverse, concentrated, or distributed loads act on the beams through the shear center of the cross-section. The presented FEM transforms the 3D analysis of the shear lag phenomenon into separated 2D cross-sectional and 1D beam modeling. The characteristics of the cross-section are firstly derived from 2D FEM, which uses a 9-node isoparametric element. Then, a 1D FEM, which uses a linear isoparametric element, is developed to compute the deflection, rotation angle, bending warping parameter, and stress resultants. Finally, the stress field is obtained from the local analysis on the 2D-cross section. A MATLAB program is executed to validate the numerical method. The validation examples have proven the efficiency and reliability of the numerical method for analyzing shear lag flexure, which is a common problem in structural design.

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Section: Examplementioning

confidence: 86%

Section: Introductionmentioning

confidence: 99%

Shear Lag Analysis due to Flexure of Prismatic Beams with Arbitrary Cross-Sections by FEM

Tran¹,

Navrátil²

2021

Period. Polytech. Civil Eng.

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“…The upper edge of the webs moves towards midspan, with respect to the centre of the top deck, and the lower edge of the webs moves towards the piers, again with respect to the centre of the bottom slab. All these effects are known and are usually taken into account by calculating the effective flange width of the cross section [13].…”

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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“…It is generally assumed in bending theory that plane sections remain plane after loading, this assumption does not hold for short span beams with wide flanges. Beams with wide flanges exhibit shear lag; i.e.-diminishing flange in-plane stresses away from the web [1]. Relatively few studies have been made on the effect of shearing strains along the middle surface of walls on the lateral buckling of thin walled open members.…”

Section: Introductionmentioning

confidence: 99%

Effect of Shear Lag on Buckling Behavior of Hat Shaped Laminated Composite Box Sections

Praseeja¹,

Mohan²

2019

Lecture Notes in Civil Engineering

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A new class of materials, laminated composites is increasingly being used for a wide range of civil infrastructure applications and aerospace structures due to their high strength, stiffness, lightweight and durability. It is generally assumed in bending theory that plane sections remain plane after loading, this assumption does not hold for box beams with wide flanges. Shear lag effect can bring non uniform normal stress distribution on flanges; it would affect the strength design of thin-walled beams. The strength of thin walled members is governed by the buckling criterion. In this paper effect of shear lag on buckling behavior of laminated composites is examined. The present study investigates about analysis of hat shaped box beam model for buckling behavior and approach for finding out the shear lag effects on symmetrically laminated graphite epoxy thin walled composite box beams under flexural loading. A parametric study has been carried out using the homogeneous and orthotropic finite element models created by ANSYS16. Influences of orthotropic parameter and cross sectional parameter are studied.

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Stress concentration due to shear lag in continuous box girders

Cited by 31 publications

References 7 publications

Shear Lag Analysis due to Flexure of Prismatic Beams with Arbitrary Cross-Sections by FEM

Shear Lag Analysis due to Flexure of Prismatic Beams with Arbitrary Cross-Sections by FEM

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

Effect of Shear Lag on Buckling Behavior of Hat Shaped Laminated Composite Box Sections

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