Influence of Compression-Flexure to Shear Lag Effect of Box Beam

2011 ◽  
Vol 181-182 ◽  
pp. 857-860 ◽  
Author(s):  
Qiang Su ◽  
Ya Ping Wu
Keyword(s):  
Stiffness Matrix ◽  
Elastic Stiffness ◽  
Shear Lag ◽  
Shear Lag Effect ◽  
Finite Element Program ◽  
Box Beam ◽  
Lag Effect ◽  
Element Program ◽  
Box Beams ◽  
Minimum Potential

In this paper, the differential equations of box beams are established based on the principle of minimum potential energy and the variational method. The elastic stiffness matrix and geometric stiffness matrix considering shear lag and compression-flexure effects are induced in this paper. And a finite element program is developed. Then the influence of compression-flexure effects to shear lag effect of box beam is analyzed.

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.

The Research of Box Beam Warping Displacement Function

2014 ◽  
Vol 578-579 ◽  
pp. 868-871
Author(s):  
Yu Ping Yue ◽  
Rong Zheng Cui
Keyword(s):  
Displacement Function ◽  
Shear Lag ◽  
Box Girder ◽  
Effect Analysis ◽  
Displacement Mode ◽  
Box Beam ◽  
Lag Effect ◽  
Beam Shear ◽  
Minimum Potential ◽  
Warping Displacement

Based on the principle of minimum potential energy, choosing warping displacement function of parabolic displacement mode, using energy variational method to deduce Box beam shear lag effect analysis of differential equation to obtain shear lag warping stress. Through the calculation of simply supported box girder model and the analyse of the stress of Wide cantilever plate, box girder roof and box girder floor Assume a new warping displacement function. Through the analysis of measured results proved the rationality of this article assumes and research value.

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

Dynamics Analysis of Steel-Concrete Composite Box Beams

2014 ◽  
Vol 528 ◽  
pp. 94-100
Author(s):  
Li Zhong Jiang ◽  
Xin Kang ◽  
Chang Qing Li
Keyword(s):  
Dynamic Performance ◽  
Composite Beams ◽  
Design Stage ◽  
Finite Element Program ◽  
Long Span ◽  
Box Beam ◽  
Long Span Bridge ◽  
Element Program ◽  
Box Beams ◽  
Composite Box Beam

Steel-concrete composite box beams have been widely used in high rise buildings and long-span bridge structures. But so far, almost all researches have been aimed at the static behavior of the composite beams and dynamic behavior of steel and concrete composite beams have been rarely studied. In this paper, by using general finite element program ANSYS to analyze the dynamic performance of the composite box beam under different geometric parameters. Research is focused on the slip stiffness、width-to-thickness ratio、depth-span ratio and the height ratio of cross section to the vibration characteristics of composite box beam. The results indicate that these factors affect the seismic dynamic response of steel-concrete composite box beams most and they should be controlled according to different situations in seismic design stage.

A CURVED BOX BEAM ELEMENT CONSIDERING SHEAR LAG EFFECT AND ITS STATIC AND DYNAMIC APPLICATIONS

2002 ◽  
Vol 253 (5) ◽  
pp. 1131-1139 ◽  
Author(s):  
WU YAPING ◽  
LAI YUANMING ◽  
ZHU YUANLIN ◽  
PAN WEIDONG
Keyword(s):  
Beam Element ◽  
Shear Lag ◽  
Shear Lag Effect ◽  
Box Beam ◽  
Lag Effect

Coupled Mechanism on Interfacial Slip and Shear Lag for Twin-Cell Composite Box Beam Under Even Load

2017 ◽  
Vol 34 (5) ◽  
pp. 601-616 ◽  
Author(s):  
J. Yu ◽  
S. W. Hu ◽  
Y. C. Xu ◽  
B. Fan
Keyword(s):  
Composite Structures ◽  
Structural Features ◽  
Interfacial Slip ◽  
Shear Lag ◽  
Shear Lag Effect ◽  
Closed Form Solutions ◽  
Concrete Plate ◽  
Box Beam ◽  
Lag Effect ◽  
Composite Box Beam

AbstractA model of Twin-cell Composite Box Beam (TCCBB), which is composed of concrete plate and thin-walled steel box beam with twin-cell, is proposed in this paper. Combined with structural features, longitudinal interfacial slip mode (LISM) and related shear hysteresis functions (SHFS) of this TCCBB model are defined respectively; analytical formulation describing combination effect between interfacial slip and shear lag is launched for this TCCBB model under even load. Based on established governing differential equations and its relative boundary conditions (calculated with compatible mechanism of interfacial slip and shear lag effect), closed form solutions of normal stress and shear stress are derived for this TCCBB model, as well as effective shear-lag coefficient and effective coupled behavior coefficient. To obtain more accurate computational results of specific coupled mechanism of this TCCBB model, numerical example is carried out to analyze and predict coupled mechanism of interfacial slip and shear lag effect for this type of composite structures.

Shear Lag Effect in Single Plane Cable-Stayed Bridge

1998 ◽  
Vol 1 (4) ◽  
pp. 301-306 ◽  
Author(s):  
Shih Toh Chang ◽  
Qiwei Zhang ◽  
Shiduo Zhang
Keyword(s):  
Axial Force ◽  
Beam Theory ◽  
Test Results ◽  
Shear Lag ◽  
Shear Lag Effect ◽  
Single Plane ◽  
Cable Stayed Bridge ◽  
Lag Effect ◽  
Combined Action ◽  
Minimum Potential

The shear lag effect in thin-walled trapezoidal box sections with inclined stiffeners within the cell is analyzed using the principle of minimum potential energy. Due to the combined action of axial force and moment in a cable-stayed bridge, the normal stress in the pylon is given by [Formula: see text]. The coefficient of shear lag can be written as [Formula: see text], where σ is the actual stress taking shear deformation of slabs into account and [Formula: see text] is the stress evaluated by elementary beam theory. In this paper, the longitudinal displacement under axial force is assumed to vary parabolically transversely across the section. Due to moment, a quartic variation is adopted. Two sets of differential equations with boundary conditions are theoretically derived. An example is illustrated by theoretical analysis and test results.

Formulas for Shear‐Lag Effect of T‐, I‐ and Box Beams

1990 ◽  
Vol 116 (5) ◽  
pp. 1306-1318 ◽  
Author(s):  
Qi‐gen Song ◽  
Alexander C. Scordelis
Keyword(s):  
Shear Lag ◽  
Shear Lag Effect ◽  
Lag Effect ◽  
Box Beams

scholarly journals Experimental study and finite element analysis on shear lag effect of thin-walled curved box beam under vehicle loads

2018 ◽  
Vol 169 ◽  
pp. 01040
Author(s):  
Hailin Lu ◽  
Heng Cai ◽  
Zheng Tang ◽  
Zijun Nan
Keyword(s):  
Finite Element ◽  
Vehicle Speed ◽  
Shear Lag ◽  
Shear Lag Effect ◽  
Element Analysis ◽  
Box Beam ◽  
Lag Effect ◽  
Vehicle Loads ◽  
Load Types ◽  
Load Size

Shear lag effects of curved box beam under vehicle loads are investigated by using three-dimensional finite element method, where 4 parameters of vehicle loads, load size, vehicle speed, vehicle load position, load types, are considered. The change rules of stress distribution and shear lag coefficients of upper flange at mid-span are obtained when the loads move to the mid-span. The results indicate that under vehicle loads, the peak shear lag coefficients is at the junction between the flange and web, shear lag effect is prominent, shear lag effect is greatly influenced by vehicle speed and vehicle load position, while load size and load types almost don’t affect shear lag coefficients but do affect the stress. The model experiment of a cantilever curved box beam is carried out to compare with finite element analysis, and the error between them is small, which testify the validity and reliability of finite element model.

Experimental Investigations of Shear Lag Effect in a Simply Supported [0o ∕±45o2 ∕ 0o]T Laminated Box Beam

2011 ◽  
Vol 117-119 ◽  
pp. 858-861
Author(s):  
Ya Ping Wu ◽  
Zhi Xiang Zha ◽  
Li Xia Wang ◽  
Yin Hui Wang
Keyword(s):  
Structural Engineering ◽  
High Efficiency ◽  
Experimental Investigations ◽  
Shear Lag ◽  
Shear Lag Effect ◽  
Normal Stress Distribution ◽  
Lag Effects ◽  
Box Beam ◽  
Lag Effect ◽  
Thin Walled

With the features of high efficiency, low consumption and good mechanical characteristic, thin-walled composite box beams have been broadly adopted in structural engineering, and its mechanical behavior has became an active research area. As shear lag effect can bring an uneven normal stress distribution on the flanges, it would remarkably affect the strength design of thin-walled beams. This paper focuses on the experimental investigations of shear lag effects in [0o∕±45o2∕ 0o]T laminated box beam under concentrated loads, and test results indicates that the shear lag effect in this composite box beam can be simulated by the two parabola.

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