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전통 목구조 팔작지붕 추녀부재의 구조적 보강에 관한 연구
조철희(Cho Cheol-Hee),신용석(Shin Yong-Seok),문금환(Moon Kum-Hwan),김판선(Kim Pan-Sun),김정섭(Kim Jeong-Sup) 대한건축학회 2009 대한건축학회 학술발표대회 논문집 - 계획계/구조계 Vol.29 No.1(구조계)
These studies experimentally investigates structural behavior and reinforcing effects by strengthening the Carbon Fiber Bar(CFB) overhanging length ratio of hip rafter(春舌) in hipped-and-gabled roof(八作屋蓋) house as follows. 1) As a result of hip rafter member test, it is found that reinforced specimen shows increased yield strength by 13%~33.6%, and ultimate strength than non-reinforced standard specimen depending on the ratio of overhanging length by 0.6%~34.3%. Also, in yield strength, based on the ratio of overhanging length increases, flexural stress shows decrease of 1%~26% in standard specimen and of 5%~20% in reinforced specimen. 2) As a result of comparing standard specimen to reinforced specimen according to the ratio of overhanging length of hip rafter, Ductile Coefficient shows increase in reinforced specimen of ⅠType by 17%, but D.C. of standard specimen and reinforced specimen in ⅡType and ⅢType were similar. As a result of experiments and analysis with hip rafter member in traditional wooden structure, proposed retrofitting method with encased CFB is more rational than existing reinforcement methods such as slide installation, steel band reinforcement, plastering mud on the ceiling and core load adjustment and putting stone in the inside considering archetype preservation, structural safety and durability of cultural properties.
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