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

Published online by Cambridge University Press:  15 July 2015

S.-W. Hu ,
J. Yu ,
Y.-Q. Huang  and
S.-Y. Xiao
S.-W. Hu
Affiliation:
Department of Materials and Structural Engineering, Nanjing Hydraulic Research Institute, Nanjing, P. R. China
J. Yu*
Affiliation:
Department of Materials and Structural Engineering, Nanjing Hydraulic Research Institute, Nanjing, P. R. China College of Civil and Transportation Engineering, Hohai University, Nanjing, P. R. China
Y.-Q. Huang
Affiliation:
College of Mechanics and Materials, Hohai University, Nanjing, P. R. China
S.-Y. Xiao
Affiliation:
Department of Materials and Structural Engineering, Nanjing Hydraulic Research Institute, Nanjing, P. R. China College of Water Conservancy and Hydropower Engineering, Hohai University, Nanjing, P. R. China
*
*Corresponding author ([email protected])
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Abstract

A 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.

Keywords

Double-box composite beamShear lag effectSymmetrical loadingComparative analysis
Type
Research Article
Information
Journal of Mechanics , Volume 31 , Issue 6 , December 2015 , pp. 653 - 663
Copyright
Copyright © The Society of Theoretical and Applied Mechanics, R.O.C. 2015 

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References

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