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Hanger로 보강된 스터드 접합부의 인장거동에 관한 실험적 연구
박휘규,김승훈,이리형,이용택,황홍순,이정희 대한건축학회 2003 대한건축학회 학술발표대회 논문집 - 계획계/구조계 Vol.23 No.1(구조계)
This paper presents the tensile behavior of the stud connection between reinforced concrete(RC) and steel members. Hanger reinforcements are placed around the studs to transfer the tensile loads to the opposite side of the concrete member. Six specimens, of which variables were arrangement details of hanger reinforcements and studs. Tensile test results show that hanger reinforcements are effective to increase tensile strength and ductility. Test tensile strengths of specimens are compared with the nominal strengths by ACI codes(ACI 318-02, ACI 349-99) and PCI 1999.
공시체 크기에 따른 콘크리트 압축강도 추정에 관한 연구
박휘규 ( Park¸ Hui-kyu ),최윤철 ( Choi¸ Yun-cheul ),이리형 ( Lee¸ Li-hyung ) 한국구조물진단유지관리공학회 2002 한국구조물진단유지관리공학회 학술발표대회 논문집 Vol.6 No.2
Since each concrete cylinder specimen has a different value of compressive strength in height, the compressive strength of concrete has been estimated by using the coefficient in a few models for size effect. Usually, field engineers have used several reference to estimate the compressive strength of sampled concrete core specimens which have different height. However, it is very difficult to determine the compressive strength in terms of height/diameter ratio and diameter size in real fields for lack of reference. In this study, more than 240 different sizes of concrete cylinder specimens are used to determine the compressive strength in terms of height/diameter ratio and diameter size in real fields. Compressive strength coefficient equation in height/diameter ratio was finally proposed to estimate the compressive strength of concrete cylinder specimens.