Journal of the Architectural Institute of Korea (대한건축학회논문집)

Architectural Institute of Korea (대한건축학회)
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Finite Element Analysis Through Model Change Method of Damaged Reinforced Concrete Beams With Externally Post-tensioning Steel Rods

외적 포스트텐셔닝 강봉 보강한 손상입은 철근콘크리트 보의 모델전환기법을 통한 유한요소해석

  • Lee, Swoo-Heon (Department of Convergence and Fusion System Engineering, Kyungpook National University)
  • 이수헌 (경북대학교 융복합시스템공학과)
  • Received : 2023.01.10
  • Accepted : 2023.03.20
  • Published : 2023.04.30
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Abstract

Several important options for modeling damaged post-tensioned reinforced concrete (RC) beams and reproducing a concrete's behavior via ABAQUS software was presented in this study. The first thing considered was a material model suitable for concrete, including compressive and tensile behavior, stress-strain relationship, and concrete damaged plasticity (CDP). The CDP model required concrete tensile cracking and compressive crushing damage parameters and additional variables such as dilation angle (ψ), plastic potential eccentricity (ϵ), the ratio of the bi-axial compressive strength to uni-axial compressive strength (fb0/fc0), the ratio of the second stress invariant on the tensile meridian to that on the compressive meridian (K), and viscosity parameter (µ). The second item was geometry related to concrete, reinforcements, and post-tensioning system while the third item involved the algorithms for model change and restart to apply the post-tensioning steel rod. The validity of the applied model was confirmed through the experimental results of the post-tensioned RC beams under a three-point bending moment.

Keywords

Acknowledgement

이 성과는 정부(과학기술정보통신부)의 재원으로 한국연구재단의 지원을 받아 수행된 연구(No. 2021R1F1A1062907)이고, 2022학년도 경북대학교 연구년 교수 연구비에 의하여 연구되었음. 또한 유한요소해석을 도와준 경북대학교 강구조 및 구조동역학 연구실 신경재 교수님과 이희두 박사에게도 감사의 말을 전함.

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