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비내진상세를 갖는 철근콘크리트 골조의 끼움벽에 의한 내진보강 기법
윤현도 ( Yun Hyun-do ),김선우 ( Kim Sun-woo ),이갑원 ( Lee Kab-won ),박완신 ( Park Wan-shin ) 한국구조물진단유지관리공학회 2006 한국구조물진단유지관리공학회 학술발표대회 논문집 Vol.10 No.2
The cast-in-place reinforced concrete infill wall is commonly used in practice for strengthening of reinforced concrete frame structures. High performance fiber-reinforced cement composite(HPFRCC) is a class of high ductile fiber-reinforced cementitious composites developed for applications in the sensitive construction industry. HPFRCCs have undergone major evolution in both materials development and the range of emerging applications. Under the light of experimental observations feasibility of different analytical methods was investigated. The objective of this study is to investigate the behaviour of such infilled frames under repeated cycle loading. For this purpose four of single story and single bay infilled frames were tested under reversed cyclic loading simulating seismic action. The main parameters used for the experimental study were, the effect of the type of infill reinforcement and the materials(concrete and HPFRCCs) of infill walls. Three different types of infill walls were used for the test specimens. Test results were evaluated to understand the effect of infills on stiffness, strength, energy dissipation, lateral drift, and ductility.
탄소섬유복합체 그리드 보강 콘크리트 기둥에 관한 연구 동향
윤현도(Yun, Hyun-Do),박완신(Park, Wan-Shin),김선우(Kim, Sun-Woo),김정은(Kim, Jeong-Eun) 대한건축학회 2022 대한건축학회논문집 Vol.38 No.11
Reinforced concrete is the most widely used construction material for building structures. However, the durability of this material is reduced due to various factors such as the cracking of concrete and corrosion of steel reinforcement. Fiber Reinforced Polymer (FRP) material, which is highly evaluated for its applicability as a concrete reinforcement, is known to be effective in enhancing the durability of structures. In this study, previous research on concrete column reinforced with carbon fiber reinforced polymer (CFRP) grid was reviewed. By analyzing these studies on replacing steel hoop, a concrete column reinforcement, with CFRP grid, it could provide reference data for future research on CFRP grid reinforced concrete columns and basic data necessary for designing CFRP grid reinforced concrete columns. The concrete column that replaced the steel hoop with the CFRP grid was divided into three categories: the column under concentric loading, the column subjected to bending and axial force, and the lateral confinement effect of the column. As a result, regarding behavior characteristics, there was no difference between ordinary steel hoop and CFRP grid; therefore, the possibility of substituting CFRP grid for ordinary steel reinforcement was confirmed. However, brittle fracture of the CFRP grid was observed during this experiment; further research on the improvement of joint strength of the CFRP grid edge joint is needed. Upon analyzing the proposed equation for the lateral confinement effect, it was found that the equations for estimating the ultimate strength of confinement concrete suggested by previous researchers could even be applied for the CFRP grid reinforced concrete column.