Matrix Analysis of Shear Lag and Shear Deformation in Thin-Walled Box Beams

2003 ◽  
Vol 129 (8) ◽  
pp. 944-950 ◽  
Author(s):  
Yaping Wu ◽  
Shizhong Liu ◽  
Yuanlin Zhu ◽  
Yuanming Lai
Keyword(s):  
Shear Deformation ◽  
Matrix Analysis ◽  
Shear Lag ◽  
Box Beams ◽  
Thin Walled

Beam finite element for thin-walled box girders considering shear lag and shear deformation effects

2021 ◽  
Vol 233 ◽  
pp. 111867
Author(s):  
Xiayuan Li ◽  
Shui Wan ◽  
Yuanhai Zhang ◽  
Maoding Zhou ◽  
Yilung Mo
Keyword(s):  
Finite Element ◽  
Shear Deformation ◽  
Shear Lag ◽  
Box Girders ◽  
Thin Walled

Computer analysis of thin-walled concrete box beams

1989 ◽  
Vol 16 (6) ◽  
pp. 902-909 ◽  
Author(s):  
Shahbaz Mavaddat ◽  
M. Saeed Mirza
Keyword(s):  
Key Words ◽  
Computer Analysis ◽  
Shear Stresses ◽  
Shear Lag ◽  
Applied Loading ◽  
Box Beam ◽  
Box Beams ◽  
Three Stages ◽  
Thin Walled ◽  
Normal And Shear Stresses

Three computer programs, written in FORTRAN WATFIV, are developed to analyze straight, monolithically cast, symmetric concrete box beams with one, two, or three cells and side cantilevers over a simple span or over two spans with symmetric mid-span loadings. The analysis, based on Maisel's formulation, is performed in three stages. First, the structure is idealized as a beam and the normal and shear stresses are calculated using the simple bending theory and St-Venant's theory of torsion. The secondary stresses arising from torsional and distortional warping and shear lag are calculated in the second and third stages, respectively. The execution times on an AMDAHL 580 system are 0.02, 0.93, and 0.25 s for the three programs, respectively. The stresses arising in each stage of analysis are then superposed to determine the overall response of the box section to the applied loading. The results are compared with Maisel's hand calculations. Key words: bending, bimoment, box beam, computer analysis, FORTRAN, shear, shear lag, thin-walled section, torsion, torsional and distortional warping.

Ultimate load analysis of thin-walled box beams considering shear lag effect

2004 ◽  
Vol 42 (8) ◽  
pp. 1199-1210 ◽  
Author(s):  
Yaping Wu ◽  
Shaoshui Yu ◽  
Chonghui Shi ◽  
Jianjun Li ◽  
Yuanming Lai ◽  
...  
Keyword(s):  
Ultimate Load ◽  
Shear Lag ◽  
Shear Lag Effect ◽  
Lag Effect ◽  
Box Beams ◽  
Thin Walled ◽  
Load Analysis

Vertical Deflection of Simply Supported Box Beam with Corrugated Steel Webs Including Effects of Shear Lag and Shear Deformation

2012 ◽  
Vol 204-208 ◽  
pp. 1012-1016 ◽  
Author(s):  
Wei Ji ◽  
Shi Zhong Liu
Keyword(s):  
Finite Element Method ◽  
Shear Deformation ◽  
Comprehensive Analysis ◽  
Shear Lag ◽  
The Finite Element Method ◽  
Vertical Deflection ◽  
Simply Supported ◽  
Box Beam ◽  
Box Beams ◽  
Good Agreement

This paper presents an method to solve the vertical deflection of the box beams with corrugated steel webs, considering both the shear lag and shear deformation of corrugated steel webs. The method is deduced by means of the variational principle. The formulas given by this method is simple and practical. Then, a comprehensive analysis on the effects of shear lag and shear deformation of corrugated steel webs is given for a simply supported box beam with corrugated steel webs under uniformly distributed. The results of vertical deflection obtained by this paper are in good agreement with those obtained by the finite element method (FEM) and the model test, respectively.

Analysis of shear lag and shear deformation effects in laminated composite box beams under bending loads

2002 ◽  
Vol 55 (2) ◽  
pp. 147-156 ◽  
Author(s):  
Wu Yaping ◽  
Zhu Yuanlin ◽  
Lai Yuanming ◽  
Pan Weideng
Keyword(s):  
Shear Deformation ◽  
Laminated Composite ◽  
Shear Lag ◽  
Box Beams ◽  
Bending Loads

Geometric Nonlinearity Analysis of Composite Laminated Box Beam

2010 ◽  
Vol 168-170 ◽  
pp. 1999-2002
Author(s):  
Qiang Su ◽  
Ya Ping Wu
Keyword(s):  
Shear Deformation ◽  
Geometric Nonlinearity ◽  
Shear Lag ◽  
Finite Element Program ◽  
Box Beam ◽  
Analysis Theory ◽  
Element Program ◽  
Box Beams ◽  
Minimum Potential ◽  
Equivalent Nodal Forces

In this paper, the differential equations of composite laminated box beams are established based on the principle of minimum potential energy and the variational method. Considering shear lag and shear deformation effects, elastic stiff matrix, geometric nonlinearity stiff matrix and equivalent nodal forces vector of composite laminated box beam element are given. And a finite element program is developed, then a new computing analysis theory for composite laminated box beam is given, both considering shear lag, shear deformation and geometric nonlinearity effects.

scholarly journals Nonlinear Buckling Analysis of Thin-Walled Box Beams considering Shear Lag

2020 ◽  
Vol 2020 ◽  
pp. 1-32
Author(s):  
Minyao Tan ◽  
Wenming Cheng
Keyword(s):  
Beam Theory ◽  
Shell Element ◽  
Beam Model ◽  
Shear Lag ◽  
Nonlinear Buckling ◽  
Lag Effects ◽  
Box Beams ◽  
Thin Walled ◽  
The Stability ◽  
Nonlinear Buckling Analysis

In this work, a general geometric nonlinear model of straight thin-walled box beams (STBBs) under combined eccentric and axial loads is established. In order to accurately reflect the behavior of STBB, the additional shear lag warping is added to enrich the displacement field. It is necessary to define the section shape function to describe the local section deformation. Therefore, extension, bending, torsion, distortion, and shear lag effects are expressed by the generalized coordinate method. Based on the stability of transverse unconstrained box beam theory, meaningful higher-order solutions can be obtained by defining a set of coupled deformation modes. The equilibrium equation is discretized by the Galerkin method, and the Newton–Raphson incremental method is used to derive and solve the nonlinear governing equations. On this basis, the analytical expression of stiffness matrix is established. For solving the stability problem, the effectiveness of the proposed method is verified by comparing the calculation results of shell element (Ansys) with other theories. Numerical examples even show that the proposed method can not only get the influence of shear lag but also obtain the variation of lateral buckling of the beam model.

Closed-form solution to thin-walled box girders considering effects of shear deformation and shear lag

2012 ◽  
Vol 19 (9) ◽  
pp. 2650-2655 ◽  
Author(s):  
Wang-bao Zhou ◽  
Li-zhong Jiang ◽  
Zhi-jie Liu ◽  
Xiao-jie Liu
Keyword(s):  
Closed Form ◽  
Shear Deformation ◽  
Closed Form Solution ◽  
Form Solution ◽  
Shear Lag ◽  
Box Girders ◽  
Thin Walled
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