내부 매입형 철골조로 보강된 철근콘크리트 건물의 내진성능평가
Seismic Performance Evaluation of Reinforced Concrete Buildings Strengthened by Embedded Steel Frame
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초록
This study is to investigate the effect of a retrofitted reinforced concrete frame with non-seismic details strengthened by embedded steel moment frames with an indirect joint, which mitigates the problems of the direct joint method. First, full-scale experiments were conducted to confirm the structural behavior of a 2-story reinforced concrete frame with non-seismic details and strengthened by a steel moment frame with an indirect joint. The reinforced concrete frame with non-seismic details showed a maximum strength of 185 kN at an overall drift ratio of 1.75%. The flexural-shear failure of columns was governed, and shear cracks were concentrated at the beam-column joints. The reinforced concrete frame strengthened by the embedded steel moment frames achieved a maximum strength of 701 kN at an overall drift ratio of 1.5% so that the maximum strength was about 3.8 times that of the specimen with non-seismic details. The failure pattern of the retrofitted specimen was the loss of bond strength between the concrete and the rebars of the columns caused by a prying action of the bottom indirect joint because of lateral force. Furthermore, methods are proposed for calculation of the specified strength of the reinforced concrete frame with non-seismic details and strengthened by the steel moment frame with the indirect joint.
Abstract
This study is to investigate the effect of a retrofitted reinforced concrete frame with non-seismic details strengthened by embedded steel moment frames with an indirect joint, which mitigates the problems of the direct joint method. First, full-scale experiments were conducted to confirm the structural behavior of a 2-story reinforced concrete frame with non-seismic details and strengthened by a steel moment frame with an indirect joint. The reinforced concrete frame with non-seismic details showed a maximum strength of 185 kN at an overall drift ratio of 1.75%. The flexural-shear failure of columns was governed, and shear cracks were concentrated at the beam-column joints. The reinforced concrete frame strengthened by the embedded steel moment frames achieved a maximum strength of 701 kN at an overall drift ratio of 1.5% so that the maximum strength was about 3.8 times that of the specimen with non-seismic details. The failure pattern of the retrofitted specimen was the loss of bond strength between the concrete and the rebars of the columns caused by a prying action of the bottom indirect joint because of lateral force. Furthermore, methods are proposed for calculation of the specified strength of the reinforced concrete frame with non-seismic details and strengthened by the steel moment frame with the indirect joint.
참고문헌 (13)
- Earthquake Annual Report, "Korea Meteorological Administration", ~ (2017)
- Hong TK, "Time-advanced occurrence of moderate-size earthquake in a stable intraplate region after a megathrust earthquake and their seismic properties", Scientific Reports, 8, pp.13331~ (2018)
- "Yonhap News; 2016 Sep 13" (2016)[URL]
- Ministry of Education, "Manual of seismic performance evaluation and retrofit for school facilities", ~ (2018)
- Ministry of Education (MOE), "Guideline for Seismic Evaluation and Rehabilitation of Existing School Buildings in Korea", 108~ (2011)
- "Union Corporation"[URL]
- "HILTI Korea Corporation"[URL]
- Korean Agency for Technology and Standards (KATS), "Method of Tensile Test for Metallick Materials - KS B 0802", KATS, ~ (2003)
- Korean Agency for Technology and Standards (KATS), "Standard Test Method for Making and Curing Concrete Specimens - KS F 2403", KATS, ~ (2014)
- Korean Agency for Technology and Standards (KATS), "Standard Test for Compressive Strength of Concrete - KS F 2405", KATS, ~ (2010)
- "ACI Committee 374. 374.1-05: Acceptance Criteria for Moment Frames Based on Structural Testing and Commentary", American Concrete Institute (ACI), ~ (2006)
- "ACI Committee 318. Building Code Requirements for Structure Concrete (ACI 318-14)", American Concrete Institute (ACI), ~ (2014)
- Architectural Institute of Korea (AIK), "Korean Building Code and Commentary", ~ (2016)