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콘크리트계 재료로 충전된 강관의 휨거동에 관한 실험적 연구
강재윤(Kang Jae-Yoon),김병석(Kim Byung-Suk),최은석(Choi Eun-Suk),진원종(Chin Won-Jong),이정우(Lee Jung-Woo),유성근(Yoo Sung-Keun),김영호(Kim Yong-Ho) 한국구조물진단유지관리학회 2004 한국구조물진단학회 학술발표회논문집 Vol.- No.-
Thin-wailed steel pipes In bending are vulnerable against buckling caused by compressive stress. However. when It is filled with concrete. the resistance against buckling Increases and It comes to have high strength. high rigidity. and good ductility. This paper attempts to characterize the structural performance of steel-concrete composite system under flexural loading, And. the paper also describes experimental results on the bending behavior of concrete-filled tubular members with respect to parameters affects the ultimate strength and ductility. A simplified finite element model verified by the experimental results was used to carry out a parametric study, The test results and parametric study suggest that the contribution of concrete confinement to the ultimate strength and the ductility is significant.
유공강판을 활용한 강관말뚝머리부와 확대기초 간의 연직 재하실험 연구
강재윤 ( Kang Jae-yoon ),정홍재 ( Jeung Hong-jae ),김영희 ( Kim Young-hee ),조영록 ( Cho Young-ryok ),황윤국 ( Hwang Yoon-koog ) 한국구조물진단유지관리공학회 2007 한국구조물진단유지관리공학회 학술발표대회 논문집 Vol.11 No.2
Generally, the design and construction of steel pipe pile require the specific requirement for connection method steel pile and footing. And many researches on new type of perfobond shear connector have been conducted to solve the problems of composite action. This paper summarizes the results of 6 compression test specimens in perforated flat bar as substitute for deformed reinforcement. It was done compression test for full sized specimens; ① the standard method applied to non-slip device and reinforcements, and ② the new type method used to perforated flat bar. As results, the standard method specimen having non-slip device occurred at 118.0tonf by chemical debonding failure and 561.0tonf of peak load. And the proposed-type specimen occurred at about 88.6-118.0tonf by chemical debonding failure and 505.7~571.9tonf of peak load. There is shown that the new type method have at least equivalent or better load compared with standard method. In conclusion, the proposed connecting method is valid and suitable.
콘크리트계 재료로 충전된 강관의 휨거동에 관한 실험적 연구
강재윤 ( Kang Jae-yoon ),김병석 ( Kim Byung-suk ),최은석 ( Choi Eun-suk ),진원종 ( Chin Won-jong ),이정우 ( Lee Jung-woo ),유성근 ( Yoo Sung-keun ),김영호 ( Kim Yong-ho ) 한국구조물진단유지관리공학회 2004 한국구조물진단유지관리공학회 학술발표대회 논문집 Vol.8 No.2
Thin-walled steel pipes in bending are vulnerable against buckling caused by compressive stress. However, when it is filled with concrete, the resistance against buckling increases and it comes to have high strength, high rigidity, and good ductility. This paper attempts to characterize the structural performance of steel-concrete composite system under flexural loading. And, the paper also describes experimental results on the bending behavior of concrete-filled tubular members with respect to parameters affects the ultimate strength and ductility. A simplified finite element model verified by the experimental results was used to carry out a parametric study. The test results and parametric study suggest that the contribution of concrete confinement to the ultimate strength and the ductility is significant.