International Journal of Earth Sciences and Engineering

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Investigation on Elastic Plastic Stage of Asymmetric Rectangular CFST Beams With Unequal Wall Thickness


Affiliations
1 School of Civil Engineering, Nanyang Institute of Technology, Nanyang-473004, China
2 Department of Engineering Mechanics, Shanghai Jiao Tong University, Shanghai-200240, China
3 Department of Civil Engineering, Shanghai Jiao Tong University, Shanghai-200240, China
 

Asymmetric rectangular CFST beams with unequal wall thickness subjected to pure bending in the elastic plastic stage are investigated in the paper. The variation of the neutral axis in the elastic plastic stage and the condition of the maximum of the ultimate bending moment are given. A case study of ten CFST beams with different cross sections is also carried out. From the theoretical analysis and the case study, it is determined that for an asymmetric cross section, the neutral axis will move and rotate nonlinearly with the plastic development of the cross section, and the translation and rotation of the neutral axis will undergo a fast-slow-fast process.

Keywords

CFST, Asymmetric Cross Section, Neutral Axis, Ultimate Bending Moment, Elastic Plastic Stage, Bearing Capacity.
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  • Investigation on Elastic Plastic Stage of Asymmetric Rectangular CFST Beams With Unequal Wall Thickness

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Authors

Yang Zhang
School of Civil Engineering, Nanyang Institute of Technology, Nanyang-473004, China
Chenjiang Yu
Department of Engineering Mechanics, Shanghai Jiao Tong University, Shanghai-200240, China
Bing Chen
Department of Civil Engineering, Shanghai Jiao Tong University, Shanghai-200240, China
Shexu Zhao
Department of Engineering Mechanics, Shanghai Jiao Tong University, Shanghai-200240, China
Siping Li
Department of Engineering Mechanics, Shanghai Jiao Tong University, Shanghai-200240, China

Abstract


Asymmetric rectangular CFST beams with unequal wall thickness subjected to pure bending in the elastic plastic stage are investigated in the paper. The variation of the neutral axis in the elastic plastic stage and the condition of the maximum of the ultimate bending moment are given. A case study of ten CFST beams with different cross sections is also carried out. From the theoretical analysis and the case study, it is determined that for an asymmetric cross section, the neutral axis will move and rotate nonlinearly with the plastic development of the cross section, and the translation and rotation of the neutral axis will undergo a fast-slow-fast process.

Keywords


CFST, Asymmetric Cross Section, Neutral Axis, Ultimate Bending Moment, Elastic Plastic Stage, Bearing Capacity.