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

Published online by Cambridge University Press:  14 September 2017

J. Yu ,
S. W. Hu ,
Y. C. Xu  and
B. Fan
J. Yu*
Affiliation:
Department of Materials and Structural EngineeringNanjing Hydraulic Research InstituteNanjing, China College of Water Conservancy and Hydropower EngineeringHohai UniversityNanjing, China
S. W. Hu
Affiliation:
Department of Materials and Structural EngineeringNanjing Hydraulic Research InstituteNanjing, China
Y. C. Xu
Affiliation:
Department of Materials and Structural EngineeringNanjing Hydraulic Research InstituteNanjing, China
B. Fan
Affiliation:
Department of Materials and Structural EngineeringNanjing Hydraulic Research InstituteNanjing, China College of Water Conservancy and Hydropower EngineeringHohai UniversityNanjing, China
*
*Corresponding author ([email protected])
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Abstract

A 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.

Keywords

TCCBB modelCoupled mechanismInterfacial slipShear lag effect
Type
Research Article
Information
Journal of Mechanics , Volume 34 , Issue 5 , October 2018 , pp. 601 - 616
Copyright
Copyright © The Society of Theoretical and Applied Mechanics 2018 

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