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변형경화형 시멘트 복합체와 콘크리트 합성 슬래브의 균열제어 성능
윤현도 ( Yun Hyun-do ),로쿠고 ( Rokugo R. ),임승찬 ( Lim Sung-chan ),박완신 ( Park Wan-shin ) 한국구조물진단유지관리공학회 2009 한국구조물진단유지관리공학회 학술발표대회 논문집 Vol.13 No.1
This paper describes the crack-damage mitigation performances of RC( Reinforced Concrete) slabs layered with SHCC(Strain-Hardening Cementitious Composites). Three RC slabs with 1,800mm length, 400mm width and 180mm thickness were made and loaded monotonically to failure. Test variable is SHCC layer thickness(20 and 40mm). For the purpose of this study, a 1.5 percent (by volume) polyethylene (PE) fiber reinforced cement was selected as the material for the SHCC layer. The test results indicated that SHCC as a replacement for concrete that surrounds the main reinforcement in RC slabs would be possible to limit crack widths and enhance flexural performance.
커플링 정도와 상세에 따른 병렬 전단벽의 내진거동 비교
윤현도(Yun Hyun-Do),박완신(Park Wan-Shin),이주화(Lee Joo-Hwa),박희연(Park Hee-yeon) 한국구조물진단유지관리학회 2003 한국구조물진단학회 학술발표회논문집 Vol.- No.-
In high multistory, reinforced concrete buildings, coupled shear walls(CSWs) can provide an efficient structural system to resist horzontal forces due to wind and seimic effects. Behavior of these structures depend on degree of coupling and details of coupling beam. This paper composed of two subjects. First subject is a verification of proposed statistical regression formula for evaluation of the degree of coupling and determination of fundamental periods of CSWS by Challal et al. Second subject is a comparison of elastic behavior and nonlinear seismic behavior of fully coupled shear wall and partially coupled shear wall for Details and Degree of coupling. This paper used IDARC-2D and Midas Gen 4.3.2 for the purpose of achievement these subjects. Analysis results shows that statistical regression formula by Chaallal revise a little. Elastic and nonlinear seismic analytical result shows that steel coupling beam and diagonally reinforced concrete coupling beam have good behavior. Also, fully coupled shear wall have food behavior than partially coupled shear wall.