A platform for research: civil engineering, architecture and urbanism
A platform for research: civil engineering, architecture and urbanism
학위논문(석사) -- 서울대학교대학원 : 공과대학 건축학과, 2023. 8. 홍성걸. ; When Ultra-High-Performance-Fiber-Reinforced-Concretes (UHPFRCs) are combined with reinforcing bars (R-UHPFRC), it leads to structural solutions that meet rigorous durability and mechanical requirements. However, the challenge lies in addressing the higher residual stresses resulting from increased shrinkage and confinement of the reinforcing bars compared to conventional reinforced concrete. Although there have been numerous investigations on the tensile behavior of normal concrete and UHPC reinforced with GFRP bars, research on UHPFRC reinforced with GFRP bars is scarce, particularly when it comes to studying the impact of the steel fiber volume ratio. The objective of this thesis is to examine how UHPFRC behaves when reinforced with steel and glass-fiber-reinforced-polymer (GFRP) re-bars, and to make a comparative analysis between them. Specifically, the study examines the effects of changes in rebar type and steel fiber volume ratio on the uniaxial tensile behavior of reinforced UHPFRC. The research follows a systematic approach that explores the overall tensile behavior, the effects of shrinkage on member shortening, and the tension stiffening effect. The first part of the study involves analyzing the global uniaxial tensile behavior of R-UHPFRC specimens, including ultimate stress and strain in the elastic and plastic states, as well as crack formations and characteristics. Next, the research focuses on the effects of shrinkage on member shortening and residual stress, examining the cracking stresses from both experimental and modified results. Finally, the study compares the tension stiffening effect for different variables, using the Tension Chord Model and Load Sharing Concept to analyze the contribution of the concrete matrix and re-bar to the tensile stress. The study's comprehensive approach, from intuitive observations to analytical results, can contribute to the development of design guidelines for UHPFRC structures that maximize their performance ...
학위논문(석사) -- 서울대학교대학원 : 공과대학 건축학과, 2023. 8. 홍성걸. ; When Ultra-High-Performance-Fiber-Reinforced-Concretes (UHPFRCs) are combined with reinforcing bars (R-UHPFRC), it leads to structural solutions that meet rigorous durability and mechanical requirements. However, the challenge lies in addressing the higher residual stresses resulting from increased shrinkage and confinement of the reinforcing bars compared to conventional reinforced concrete. Although there have been numerous investigations on the tensile behavior of normal concrete and UHPC reinforced with GFRP bars, research on UHPFRC reinforced with GFRP bars is scarce, particularly when it comes to studying the impact of the steel fiber volume ratio. The objective of this thesis is to examine how UHPFRC behaves when reinforced with steel and glass-fiber-reinforced-polymer (GFRP) re-bars, and to make a comparative analysis between them. Specifically, the study examines the effects of changes in rebar type and steel fiber volume ratio on the uniaxial tensile behavior of reinforced UHPFRC. The research follows a systematic approach that explores the overall tensile behavior, the effects of shrinkage on member shortening, and the tension stiffening effect. The first part of the study involves analyzing the global uniaxial tensile behavior of R-UHPFRC specimens, including ultimate stress and strain in the elastic and plastic states, as well as crack formations and characteristics. Next, the research focuses on the effects of shrinkage on member shortening and residual stress, examining the cracking stresses from both experimental and modified results. Finally, the study compares the tension stiffening effect for different variables, using the Tension Chord Model and Load Sharing Concept to analyze the contribution of the concrete matrix and re-bar to the tensile stress. The study's comprehensive approach, from intuitive observations to analytical results, can contribute to the development of design guidelines for UHPFRC structures that maximize their performance ...
Tensile Behavior Characteristics of GFRP and Steel Rebar Reinforced UHPFRC ; GFRP 및 철근 보강 UHPFRC의 인장 거동 특성
홍승기 (author) / 홍성걸 / Hong, Seungkee / 공과대학 건축학과 / 건축구조
2023-01-01
000000000050▲000000000058▲000000177290▲
Theses
Electronic Resource
English
DDC:
690
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