Computers and Concrete

  • 제23권1호
  • /
  • Pages.11-23
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  • 2019
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  • 1598-8198(pISSN)
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  • 1598-818X(eISSN)
테크노프레스 (Techno-Press)
권호 표지
DOI QR코드

DOI QR Code

Validation of a non-linear hinge model for tensile behavior of UHPFRC using a Finite Element Model

  • Mezquida-Alcaraz, Eduardo J. (Instituto de Ciencia y Tecnologia del Hormigon (ICITECH), Universitat Politecnica de Valencia) ;
  • Navarro-Gregori, Juan (Instituto de Ciencia y Tecnologia del Hormigon (ICITECH), Universitat Politecnica de Valencia) ;
  • Lopez, Juan Angel (Instituto de Ciencia y Tecnologia del Hormigon (ICITECH), Universitat Politecnica de Valencia) ;
  • Serna-Ros, Pedro (Instituto de Ciencia y Tecnologia del Hormigon (ICITECH), Universitat Politecnica de Valencia)
  • 투고 : 2018.08.15
  • 심사 : 2019.01.15
  • 발행 : 2019.01.25
⟨ 이전 논문 다음 논문 ⟩

초록

Nowadays, the characterization of Ultra-High Performance Fiber-Reinforced Concrete (UHPFRC) tensile behavior still remains a challenge for researchers. For this purpose, a simplified closed-form non-linear hinge model based on the Third Point Bending Test (ThirdPBT) was developed by the authors. This model has been used as the basis of a simplified inverse analysis methodology to derive the tensile material properties from load-deflection response obtained from ThirdPBT experimental tests. In this paper, a non-linear finite element model (FEM) is presented with the objective of validate the closed-form non-linear hinge model. The state determination of the closed-form model is straightforward, which facilitates further inverse analysis methodologies to derive the tensile properties of UHPFRC. The accuracy of the closed-form non-linear hinge model is validated by a robust non-linear FEM analysis and a set of 15 Third-Point Bending tests with variable depths and a constant slenderness ratio of 4.5. The numerical validation shows excellent results in terms of load-deflection response, bending curvatures and average longitudinal strains when resorting to the discrete crack approach.

키워드

과제정보

연구 과제 주관 기관 : State Research Agency of Spain

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