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.

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.

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.

scholarly journals Parametric Analysis of the Shear Lag Effect in Tube Structural Systems of Tall Buildings

2020 ◽  
Vol 11 (1) ◽  
pp. 278
Author(s):  
Ivan Hafner ◽  
Anđelko Vlašić ◽  
Tomislav Kišiček ◽  
Tvrtko Renić
Keyword(s):  
Parametric Analysis ◽  
Numerical Models ◽  
Tall Buildings ◽  
Structural Systems ◽  
Structural Elements ◽  
Structural System ◽  
Shear Lag ◽  
Shear Lag Effect ◽  
Lag Effect ◽  
Secondary Structural Elements

Horizontal loads such as earthquake and wind are considered dominant loads for the design of tall buildings. One of the most efficient structural systems in this regard is the tube structural system. Even though such systems have a high resistance when it comes to horizontal loads, the shear lag effect that is characterized by an incomplete and uneven activation of vertical elements may cause a series of problems such as the deformation of internal panels and secondary structural elements, which cumulatively grow with the height of the building. In this paper, the shear lag effect in a typical tube structure will be observed and analyzed on a series of different numerical models. A parametric analysis will be conducted with a great number of variations in the structural elements and building layout, for the purpose of giving recommendations for an optimal design of a tube structural system.

Shear lag effect on stress concentration in simply-supported stiffened box girder

2021 ◽  
Vol 183 ◽  
pp. 106715
Author(s):  
Eiki Yamaguchi ◽  
Naoto Kittaka ◽  
Buchit Maho ◽  
Piti Sukontasukkul
Keyword(s):  
Stress Concentration ◽  
Shear Lag ◽  
Shear Lag Effect ◽  
Box Girder ◽  
Simply Supported ◽  
Lag Effect
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