Axial Load Response of Ultra-High-Strength Concrete Columns and High-Strength Reinforcement
- Authors
- Shin, Hyun-Oh; Yoon, Young-Soo; Cook, William D.; Mitchell, Denis
- Issue Date
- 3월-2016
- Publisher
- AMER CONCRETE INST
- Keywords
- axial load; columns; confinement; high-strength longitudinal reinforcement; high-strength transverse reinforcement; ultra-high-strength concrete
- Citation
- ACI STRUCTURAL JOURNAL, v.113, no.2, pp.325 - 336
- Indexed
- SCIE
SCOPUS
- Journal Title
- ACI STRUCTURAL JOURNAL
- Volume
- 113
- Number
- 2
- Start Page
- 325
- End Page
- 336
- URI
- https://scholar.korea.ac.kr/handle/2021.sw.korea/89273
- DOI
- 10.14359/51688063
- ISSN
- 0889-3241
- Abstract
- Eight ultra-high-strength concrete (UHSC) square columns were constructed and tested to investigate the effects of yield strength of transverse (f(yh) approximate to 550 and 800 MPa [79.8 and 116.0 ksi]) and longitudinal reinforcement (f(yh) approximate to 480 and 640 MPa [69.6 and 92.8 ksi]) on axial load response. The UHSC had compressive strengths varying from 185 to 200 MPa (26.8 to 29.0 ksi). The effects of using high-strength transverse reinforcement with two different configurations and amounts were evaluated. For a constant amount of confinement reinforcement, high-strength transverse reinforcement improves the performance of well-confined UHSC columns in terms of strength, post-peak deformability, and toughness, provided that the hoops are detailed with proper end anchorage (135-degree seismic hooks). The use of high-strength transverse reinforcement was also effective in reducing steel congestion for UHSC columns. The effects of using high-strength longitudinal reinforcement in UHSC columns were also studied. It was determined that the combination of high-strength longitudinal reinforcement and UHSC results in yielding of this reinforcement. However, for typical longitudinal reinforcement ratios, the benefit of using high-strength longitudinal steel is limited due to the relatively small contribution of this reinforcement to the strength of UHSC columns and the early cover spalling of UHSC.
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Collections - College of Engineering > School of Civil, Environmental and Architectural Engineering > 1. Journal Articles
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