Steel and Composite Structures

  • 제24권6호
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  • Pages.689-695
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  • 2017
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  • 1229-9367(pISSN)
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  • 1598-6233(eISSN)
테크노프레스 (Techno-Press)
권호 표지
DOI QR코드

DOI QR Code

A constitutive model for confined concrete in composite structures

  • Shi, Qing X. (Department of Civil Engineering, Xi'an University of Architecture and Technology) ;
  • Rong, Chong (Department of Civil Engineering, Xi'an University of Architecture and Technology) ;
  • Zhang, Ting (Department of Civil Engineering, Xi'an University of Architecture and Technology)
  • 투고 : 2016.12.05
  • 심사 : 2017.05.19
  • 발행 : 2017.08.30
⟨ 이전 논문 다음 논문 ⟩

초록

The constitutive relation is an important factor in analysis of confined concrete in composite structures. In order to propose a constitutive model for nonlinear analysis of confined concrete, lateral restraint mechanism of confined concrete is firstly analyze to study the generalities. As the foundation of the constitutive model, peak stress and peak strain is the first step in research. According to the generalities and the Twin Shear Unified Strength Theory, a novel unified equation for peak stress and peak strain are established. It is well coincident with experimental results. Based on the general constitutive relations and the unified equation for peak stress and peak strain, we propose a unified and convenient constitutive model for confined concrete with fewer material parameters. Two examples involved with steel tube confined concrete and hoop-confined concrete are considered. The proposed constitutive model coincides well with the experimental results. This constitutive model can also be extended for nonlinear analysis to other types of confined concrete.

키워드

과제정보

연구 과제 주관 기관 : National Science Foundation of China

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