RC자켓팅으로 보강된 기존 벽체의 면외방향 내진성능 실험평가
Experimental Investigation of Out-of-Plane Seismic Resistance of Existing Walls Strengthened with RC Jacketing
1
조회
0
다운로드
0
인용
0
참고문헌
키워드
초록
In this study, the out-of-plane seismic resistance of lightly-reinforced existing walls strengthened with thick RC jacket was investigated. The thick RC jacket with a thickness of 500 mm was placed at one side of the thin existing wall with a thickness of 150 mm. At the interface between the wall and RC jacket, a tee-shaped steel section with a number of anchor bolts and dowel bars was used as the shear connector. To investigate the connection performance and strengthening effects, the cyclic loading tests of four jacketed wall specimens were performed. The tests showed that the flexural strength of the jacketed walls under out-of-plane loading was significantly increased. During the initial behavior, the tee shear connector transferred forces successfully at the interface without slip. However, as the cracking, spalling, and crushing of the concrete increased in the exiting walls, the connection performance at the interface was significantly degraded and, consequently, the strength of the jacketed walls was significantly decreased. The flexural strength of the jacketed walls with tee shear connector was estimated considering the full and partial composite actions of the tee shear connector.
Abstract
In this study, the out-of-plane seismic resistance of lightly-reinforced existing walls strengthened with thick RC jacket was investigated. The thick RC jacket with a thickness of 500 mm was placed at one side of the thin existing wall with a thickness of 150 mm. At the interface between the wall and RC jacket, a tee-shaped steel section with a number of anchor bolts and dowel bars was used as the shear connector. To investigate the connection performance and strengthening effects, the cyclic loading tests of four jacketed wall specimens were performed. The tests showed that the flexural strength of the jacketed walls under out-of-plane loading was significantly increased. During the initial behavior, the tee shear connector transferred forces successfully at the interface without slip. However, as the cracking, spalling, and crushing of the concrete increased in the exiting walls, the connection performance at the interface was significantly degraded and, consequently, the strength of the jacketed walls was significantly decreased. The flexural strength of the jacketed walls with tee shear connector was estimated considering the full and partial composite actions of the tee shear connector.
참고문헌 (17)
- 정란, "내진설계 되지 않은 공동주택의 진동대 실험에 의한 내진성능평가", 콘크리트학회 논문집, 18(6), pp.721~728 (2006), 한국콘크리트학회
- 정란, "기존 철근콘크리트 벽식 공동주택의 내진성능 예비평가법에 관한 연구", 콘크리트학회 논문집, 19(3), pp.293~300 (2007), 한국콘크리트학회
- Park TW, "Seismic Strengthening Effects of Bearing Wall Apartment House", Ph.D., pp.2005
- Structural Design and Retrofit Guidelines for Remodeling of Apartment House, "Architectural Institute of Korea", Ministry of Land, Infrastructure, and Transport of Korea, ~ (2003)
- Seismic Evaluation and Retrofit of Existing Buildings. ASCE, "SEI 4117", American Society of Civil Engineers, 2017
- "ACI Committee 318. Building Code Requirements and for Structural Concrete (ACI 31814)and Commentary", American Concrete Institute, ~
- Seismic Design of CastinPlace Concrete Diaphragms, Chords, and Collectors, "Moehle JP", National Institute of Standards and Technology, ~, pp.NIST GCR 109174 (2010)
- Bett BJ, "Lateral Load Response of Strengthened and Repaired Reinforced Concrete Columns", ACI Structural Journal, 85(5), pp.499508~ (1988)
- Rodriguez M, "Repair and Strengthening of Reinforced Concrete Buildings for Seismic Resistance", Earthquake Spectra, 7(3), pp.439~459 (1991)
- Alcocer SM, "Strength of Reinforced Concrete Frame Connections Rehabilitated by Jacketing", ACI Structural Journal, 90(3), pp.249~261 (1993)
- Rodriguez M, "Seismic Load Tests on Reinforced Concrete Columns Strengthened by Jacketing", ACI Structural Journal, 91(2), pp.150~159 (1994)
- Julio ENBS, "Reinforced Concrete JacketingInterface Influence on Monotonic Loading Response", ACI Structural Journal, 102(2), pp.252~257 (2005)
- 이유선, "단부 증타 보강된 RC 전단벽체의 전단강도", 콘크리트학회 논문집, 27(5), pp.489~499 (2015), 한국콘크리트학회[DOI]
- 권혁진, "프리스트레스 와이어로프를 활용한 단면확대로 내진 보강된 벽체의 휨 거동 평가", 콘크리트학회 논문집, 29(5), pp.483~491 (2017), 한국콘크리트학회
- 황용하, "철근 선조립 공법 기반 단면확대 보강기둥의 중심 축하중 거동 평가", 콘크리트학회 논문집, 30(6), pp.609~616 (2018), 한국콘크리트학회[DOI]
- Eom TS, "Evaluation of energy dissipation of slender reinforced concrete members and its applications", Engineering Structures, 32(10), pp.2884~2893 (2010)
- Park HG, "A Simplified Method for Estimating the Amount of Energy Dissipated by Flexure-Dominated Reinforced Concrete Members for Moderate Cyclic Deformations", Earthquake Spectra, 22(2), pp.459~490 (2006)