Advances in concrete construction

  • 제17권2호
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  • Pages.75-92
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  • 2024
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  • 2287-5301(pISSN)
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  • 2287-531X(eISSN)
테크노프레스 (Techno-Press)
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Shear strength prediction of high strength steel reinforced reactive powder concrete beams

  • Qi-Zhi Jin (Guangxi Key Laboratory of Green Building Materials and Construction Industrialization, Guilin University of Technology) ;
  • Da-Bo He (School of Civil Engineering, Nanning College of Technology) ;
  • Xia Cao (Department of Engineering, School of Science & Technology, City, University of London) ;
  • Feng Fu (Department of Engineering, School of Science & Technology, City, University of London) ;
  • Yi-Cong Chen (College of Civil Engineering, Fuzhou University) ;
  • Meng Zhang (Infrastructure construction department, Guilin University of Technology) ;
  • Yi-Cheng Ren (Jiangsu University Jingjiang College)
  • 투고 : 2022.05.10
  • 심사 : 2024.07.15
  • 발행 : 2024.02.25
⟨ 이전 논문 다음 논문 ⟩

초록

High Strength steel reinforced Reactive Powder Concrete (RPC) Beam is a new type of beams which has evident advantages than the conventional concrete beams. However, there is limited research on the shear bearing capacity of high-strength steel reinforced RPC structures, and there is a lack of theoretical support for structural design. In order to promote the application of high-strength steel reinforced RPC structures in engineering, it is necessary to select a shear model and derive applicable calculation methods. By considering the shear span ratio, steel fiber volume ratio, longitudinal reinforcement ratio, stirrup ratio, section shape, horizontal web reinforcement ratio, stirrup configuration angle and other variables in the shear test of 32 high-strength steel reinforced RPC beams, the applicability of three theoretical methods to the shear bearing capacity of high-strength steel reinforced RPC beams was explored. The plasticity theory adopts the RPC200 biaxial failure criterion, establishes an equilibrium equation based on the principle of virtual work, and derives the calculation formula for the shear bearing capacity of high-strength steel reinforced RPC beams; Based on the Strut and Tie Theory, considering the softening phenomenon of RPC, a failure criterion is established, and the balance equation and deformation coordination condition of the combined force are combined to derive the calculation formula for the shear bearing capacity of high-strength reinforced RPC beams; Based on the Rankine theory and Rankine failure criterion, taking into account the influence of size effects, a calculation formula for the shear bearing capacity of high-strength reinforced RPC beams is derived. Experimental data is used for verification, and the results are in good agreement with a small coefficient of variation.

키워드

과제정보

This research was financially supported by the National Natural Science Foundation of China (Grant No. 51368013) and Guangxi Key Laboratory of Green Building Materials and Construction Industrialization (No. 19-J-21-6), The authors wish to acknowledge the sponsors. However, any opinions, findings, conclusions and recommendations presented in this paper are those of the authors and do not necessarily reflect the views of the sponsors.

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