Shear lag analysis of I‐shaped structural members

Ni, Xiaowu; Cao, Shuangyin

doi:10.1002/tal.1471

Cited by 14 publications

(11 citation statements)

References 16 publications

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“…It is observed from Table 1 that the results analyzed by RWB are in good agreement with the results from FEM 3D-Solid [40]. Ni and Cao [41] used an analytical method to analyze this problem and compared it with the results obtained from ANSYS commercial software by using Solid 45 element. In Fig.…”

Section: Examplesupporting

confidence: 59%

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: Examplesupporting

confidence: 59%

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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“…2, the coordinate origin is taken to coincide with the center of the cross section. Based on the deformation characteristics of the structural member with flange [14,16,21], the longitudinal displacement at any point of the cross section of the T-shaped shear walls consists of the section bending displacement, warping displacement and axial compression displacement, which can be expressed as…”

Section: Theoretical Solution 21 Displacement Function For Shear Lagmentioning

confidence: 99%

“…Zhang et al [13] deduced equations about the shear-lag coefficient and deformation of T-shaped short-leg shear wall and discussed the effects of different geometric parameters and load forms on the shear lag deformation. Ni and Cao [14] obtained the formulas of normal stress and deflection of T-shaped short-leg shear walls taking the additional deflection caused by the shear lag effect into account. Then, they established a calculation method of cracking load depending on the effective flange width.…”

Section: Introductionmentioning

confidence: 99%

Analytical Study on the Effective Flange Width for T-shaped Shear Walls

2020

Period. Polytech. Civil Eng.

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This study was organized to derive simplified expressions to estimate the effective flange width for T-shaped shear walls at different loading stages. For that purpose, the variation in the effective flange width was explored by introducing dimensionless effective flange width coefficient. According to the principle of minimum potential energy, the theoretical expression of the effective flange width coefficient in the elastic stage was obtained. Furthermore, a parametric study considering the axial load ratio, height-width ratio of flange and width-thickness ratio of the flange, as well as the section aspect ratio was conducted to determine the effective flange width using verified nonlinear finite-element models. In light of the parametric analysis results, a formula model was proposed depending on the axial load ratio and height-width ratio of flange. Finally, the predictions of the proposed simplified formulas were verified with the theoretical solutions or finite element (FE) results, which indicated that the proposed formulas can accurately capture the effective flange width at the elastic, yield and limit state. Keywordsshear walls, shear lag effect, effective flange width, principle of minimum potential energy, FEM

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mentioning

confidence: 99%