scholarly journals Research on Shear Lag Effect of T-shaped Short-leg Shear Wall

2017 ◽  
Author(s):  
Chengqing Liu ◽  
Xiaodan Wei ◽  
Xiangyong Ni ◽  
Guangjie He
Keyword(s):  
Theoretical Analysis ◽  
Cross Section ◽  
Plane Section ◽  
Parameter Analysis ◽  
Element Calculation ◽  
Shear Lag ◽  
Longitudinal Displacement ◽  
Energy Principle ◽  
Lag Effect ◽  
Calculation Results

Longitudinal displacement of cross section of T-shaped shortlegshear wall was simplified to three parts: shear lag warpingdisplacement, plane section bending displacement and axialdisplacement. Shear lag warping deformation was assumed ascubic parabola distribution along flange, and based on minimumpotential energy principle, differential equations were deduced;with boundary conditions, a calculation theory for shear lageffect was established. With two T-shaped short-leg shear wallmodels, vertical stresses of flanges were obtained by calculationtheory and finite element calculation respectively, and comparisonbetween theoretical analysis results and numerical calculationresults was made. At last, parameter analysis was carriedout, and the influence of shear force, shear span ratio andheight-thickness ratio on shear lag coefficient was obtained.Research shows that numerical calculation results are in goodagreement with theoretical analysis results, and each parameterhas different influence on shear lag coefficient.

Theoretical and Experimental Investigations on Shear Lag Effect of Double-Box Composite Beam with Wide Flange under Symmetrical Loading

2015 ◽  
Vol 31 (6) ◽  
pp. 653-663 ◽  
Author(s):  
S.-W. Hu ◽  
J. Yu ◽  
Y.-Q. Huang ◽  
S.-Y. Xiao
Keyword(s):  
Composite Beam ◽  
Experimental Investigations ◽  
Shear Lag ◽  
Shear Lag Effect ◽  
Theoretical Derivation ◽  
Energy Principle ◽  
Lag Effect ◽  
Symmetrical Loading ◽  
Stress Behaviors ◽  
Minimum Potential Energy Principle

ABSTRACTA new type of steel-concrete composite beam with double-box cross-section is proposed in this paper. In order to investigate stress behaviors and deflection characteristics of such composite beam with wide flange considering the shear lag effect, theoretical analysis and experimental study are launched simultaneously. Based on the minimum potential energy principle, governing differential equations in view of the shear lag effect are deduced by energy variational method, and analytical solutions of it's stress and deflection under the effect of symmetrical loading are calculated. The preceding analyses show that relative error is less than 14.71%, with a good agreement, and farther show that this method of theoretical derivation, which is used for analyzing shear lag effect of composite beam with wide flange, has certain reference and guidance.

Numerical Solution of Section Stress about Steel-Concrete Composite Beams

2010 ◽  
Vol 163-167 ◽  
pp. 1614-1619
Author(s):  
Hai Gen Cheng ◽  
Yan Lou Yu ◽  
Yong Zhang
Keyword(s):  
Differential Equation ◽  
Cross Section ◽  
Beam Theory ◽  
Composite Beams ◽  
Nonuniform Distribution ◽  
Concrete Slabs ◽  
Shear Lag ◽  
Box Girder ◽  
Simply Supported ◽  
Lag Effect

Steel-concrete composite beams are composed of concrete slabs and steel girders by shear connectos. Due to the shear lag effect, the longitudinal normal stress of cross section is nonuniform distribution,and it is difficult to analyse the effect of that by ordinary beam theory. A differential equation of equilibrium is constituted corresponding to the compatibility of deformation and the equilibrium of forces about steel-concrete composite beams under particular assumed condition. The method of variable-separating is applied to solve the differential equation with the simply supported boundary condition. An example of steel-concrete composite box girder is given to analyse the effect of shear lag on its stress and approve its applicability.

Influence of Main Structural Dimension on the Shear Lag Effect of Box Girder Used in Cable-Stayed Bridge

2013 ◽  
Vol 405-408 ◽  
pp. 1483-1488 ◽  
Author(s):  
Yu Ping Zhang ◽  
Chuan Xi Li
Keyword(s):  
Shell Element ◽  
Parameter Analysis ◽  
Bottom Flange ◽  
Shear Lag ◽  
Shear Lag Effect ◽  
Box Girder ◽  
Thickness Change ◽  
Cable Stayed Bridge ◽  
Flange Thickness ◽  
Lag Effect

Through simulating box girder with shell element, the influence of the top flangebottom flange and web thickness on the shear lag effect of box girder used in cable-stayed bridge was discussed on the background of Jianning bridge in Zhuzhou. Parameter analysis of the thickness change of the top flange, bottom flange and web on shear lag effect of box girder was based on analyzing and comparing the calculated results. The results show that the thickness change of the top flange, bottom flange and web have more influence on the shear lag effect of top flange than that of bottom flange; thickness increase of bottom flange and web can make the shear lag effect intensified obviously; and thickness change of web has the most significant influence on the shear lag effect among them for box girder with single box and three rooms used in cable-stayed bridges.

Stress Calculation for Large Storage Oil Tanks' Shells Based on the Theory of Short Cylindrical Shell

2012 ◽  
Vol 602-604 ◽  
pp. 2163-2169
Author(s):  
Yu Kun Li ◽  
Wen Hong Sun ◽  
Guan Duan ◽  
Jun Hui Liang
Keyword(s):  
Differential Equation ◽  
Finite Element ◽  
Cylindrical Shell ◽  
General Solution ◽  
Cross Section ◽  
Large Diameter ◽  
Element Calculation ◽  
Calculation Results ◽  
Stress And Deformation ◽  
Oil Tanks

This article adopts Krylov’s functions, getting a general solution of deflection differential equation of short cylindrical shell. Due to the general solution and continuity and smoothness conditions of shell’s deflection, detailed calculating formulas about deformation and stress of large diameter cylindrical shells with cross-section are obtained, whose solving process is realized by programming. Taking a running tank for example, the method deduced in this article calculates its deformation and stress. Compared with the FE (finite element) calculation results and the test data, this method calculates tank wall's stress and deformation accurately, which can be used to check the thickness of tank shell.

Numerical and theoretical analysis of spatial shear lag effect in through wide box bowstring arch bridge main girder

Structures ◽  
2021 ◽  
Vol 33 ◽  
pp. 141-151
Author(s):  
Yanfeng Li ◽  
Jihe Zhao ◽  
Longsheng Bao ◽  
Lei Dong ◽  
Qinghe Wang
Keyword(s):  
Theoretical Analysis ◽  
Shear Lag ◽  
Shear Lag Effect ◽  
Arch Bridge ◽  
Lag Effect ◽  
Main Girder

Numerical Analysis of Shear Lag Effect for Concrete Huge Section Box Grider

2011 ◽  
Vol 130-134 ◽  
pp. 1630-1633
Author(s):  
Ming Qiao Zhu ◽  
Hai Qiang Huo ◽  
Shao Hui Wu
Keyword(s):  
Parameter Analysis ◽  
Load Parameter ◽  
Shear Lag ◽  
Shear Lag Effect ◽  
Box Girder ◽  
Lag Effect ◽  
Relevant Reference ◽  
Technical Specifications ◽  
Element Type ◽  
And Function

Through a lot of investigations and studies ,and refering to the current related technical specifications and relevant reference, and combining with the characteristics of the ordinary concrete box section component , single box double room concrete huge section box girder which can realize city bridges double traffic is devised creatively,considering of the need of structure and function. By choosing proper element type and material modle, the designed box grider is modeled by the nonlinear analysis software ANSYS. The shear lag effect of the concrete huge section box girder is studied by applying four load conditions including prestressed load, the upper and lower live load and double load. Parameter analysis are done, which include the load type and width-span ratio.And corresponding conclusions are drawn.

Approximate Calculation of Pressure Drop in Laminar Flow of Generalized Newtonian Liquid Through Channel of Noncircular Cross Section

1994 ◽  
Vol 59 (3) ◽  
pp. 603-615 ◽  
Author(s):  
Václav Dolejš ◽  
Ivan Machač ◽  
Petr Doleček
Keyword(s):  
Pressure Drop ◽  
Laminar Flow ◽  
Numerical Solution ◽  
Cross Section ◽  
Approximate Calculation ◽  
Newtonian Liquid ◽  
Straight Channel ◽  
Suggested Procedure ◽  
Noncircular Cross Section ◽  
Calculation Results

The paper presents a modification of the equations of Rabinowitsch-Mooney type for an approximate calculation of pressure drop in laminar flow of generalized Newtonian liquid through a straight channel whose cross section forms a simple continuous area. The suitability of the suggested procedure of calculation of pressure drop is demonstrated by the comparison of calculation results with both the published and original results of numerical solution and experiments.

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.

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