Steel and Composite Structures

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Behavior of composite CFST beam-concrete column joints

  • Kim, Seung-Eock (Department of Civil and Environmental Engineering, Sejong University) ;
  • Choi, Ji-Hun (Department of Civil and Environmental Engineering, Sejong University) ;
  • Pham, Thai-Hoan (Department of Concrete Structures, National University of Civil Engineering) ;
  • Truong, Viet-Hung (Faculty of Civil Engineering, Thuyloi University) ;
  • Kong, Zhengyi (School of Civil Engineering and Architecture, Anhui University of Technology) ;
  • Duong, Nguyen-The (Faculty of Civil Engineering, Duy Tan University) ;
  • Vu, Quang-Viet (Faculty of Civil Engineering, Vietnam Maritime University)
  • Received : 2019.10.06
  • Accepted : 2020.09.11
  • Published : 2020.10.10
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Abstract

This paper introduces a new composite joint, which is the composite CFST beam- concrete column joint, and it is more convenient for transportation and erection than conventionally welded joints. The main components of this joint include steel H-beams welded with CFST beams, reinforced concrete columns, and reinforced concrete slabs. The steel H-beams and CFST beams are connected with a concrete slab using shear connectors to ensure composite action between them. An experimental investigation was conducted to evaluate the proposed composite joint performance. A three-dimensional (3D) finite element (FE) model was developed and analyzed for this joint using the ABAQUS/explicit. The FE model accuracy was validated by comparing its results with the relevant test results. Additionally, the parameters that consisted of the steel box beam thickness, concrete compressive strength, steel yield strength, and reinforcement ratio in the concrete slab were considered to investigate their influence on the proposed joint performance.

Keywords

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