반복하중을 받는 고강도 철근콘크리트 보-기둥 접합부에서 강섬유의 보강효과에 관한 연구A Study on the Effect of Steel Fibers in Reinforced High-Strength Concrete Beam-Column Joints Subject to Load Reversal
- Other Titles
- A Study on the Effect of Steel Fibers in Reinforced High-Strength Concrete Beam-Column Joints Subject to Load Reversal
- Authors
- 김민구; 곽윤근; 강현구; 홍성걸; 김우석; 권우현
- Issue Date
- 2011
- Publisher
- 대한건축학회
- Keywords
- 보-기둥 접합부; 내진설계; 반복하중; 강섬유; 고강도 콘크리트; 에너지소산; 횡보강근; 접합부 전단강도; Beam-Column Joint; Seismic Design; Cyclic Loading; Steel Fibers; High Strength Concrete; Energy Dissipation; Joint Transverse Reinforcement; Joint Shear Strength
- Citation
- 대한건축학회논문집 구조계, v.27, no.06, pp.19 - 30
- Journal Title
- 대한건축학회논문집 구조계
- Volume
- 27
- Number
- 06
- Start Page
- 19
- End Page
- 30
- URI
- https://scholarworks.bwise.kr/kumoh/handle/2020.sw.kumoh/2743
- ISSN
- 1226-9107
- Abstract
- Modern buildings are becoming taller and larger, and thus the use of high strength concrete has been increasingly adopted to produce a slender high-rise building. However, high strength concrete is very brittle which may not be acceptable for seismic design. The use of steel fibers in reinforced high strength concrete beam-column joints can improve seismic performance of beam-column joints and reduce the amount of joint transverse reinforcement that greatly complicates reinforcing fabrication in the joint with seismic details. To investigate the characteristics of reinforced high strength concrete beam-column joints using steel fibers and minimal joint transverse reinforcement, seismic testing of ten beam-column joint subassemlages was performed by applying two reversed cycles at each cycle up to 19 cycles. The primary variable was the amount of steel fibers and joint transverse reinforcement. The results of tests indicate that the seismic performance of the beam-column joints were improved with the application of steel fibers with 1 to 1.5% volume fraction that might replace at least one layer of closed joint transverse reinforcement, as the crack width control, load capacity, energy dissipation capacity, joint shear strength and ductility were better due to the steel fibers. Also, a new shear strength equation for a beam-column joint with steel fibers and minimal transverse reinforcement is proposed.
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