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콘크리트내 표면매입 보강된 FRP 판과 콘크리트 사이의 착-미끄러짐 관계 해석
서수연,Seo, Soo-Yeon 한국콘크리트학회 2014 콘크리트학회논문집 Vol.26 No.1
이 연구는 표면매입 보강된 FRP 판과 콘크리트사이의 응력전달기구를 이론적으로 연구한 것으로서 이선형 부착모델을 이용하여 부착거동을 묘사하고 이를 실험 결과와 비교하여 신뢰성있는 해석방법을 제시하였다. 연구로부터, 표면매입된 FRP 판과 콘크리트사이의 계면특성을 고려한 미분방정식에 이선형 부착-미끄러짐 관계곡선을 사용하여 해석할 경우, 모델의 임계값인 최대전단강도와 미끄러짐 변위, 그리고 박락에 의한 연화거동이 시작될 때의 변위값 선정과정이 제시되었다. 또한 제안된 모델을 사용하여 부착길이가 다르게 보강된 표면매입 FRP 판의 미끄러짐 거동을 해석한 결과 실제 거동을 매우 근사하게 묘사할 수 있는 것으로 나타났다. In this paper, a stress transfer mechanism between near surface-mounted (NSM) fiber reinforced polymer (FRP) plate and concrete was investigated and a reliable analytical procedure for it was presented by using bilinear bond-slip model simulating the bond behavior of NSM FRP plate. As a result, critical values in the bi-linear model such as maximum shear strength, slip at that time and failure slip at the initiation of softening de-bonding were suggested for being used in the differential equation considering he interfacial characteristic between NSM FRP and concrete. Also, it was found that the bond-slip behavior could be suitably redicted by using the proposed procedure even in the case of various bond lengths from the comparison with bond test result.
서수연(Seo, Soo-Yeon),최기봉(Choi, Ki-Bong) 한국구조물진단유지관리학회 2010 한국구조물진단학회 학술발표회논문집 Vol.2010 No.2
This paper reviews the disasters affecting the structural capacity of buildings in domestic. And the structural behavior of building with damaged columns due to a disaster was investigated by analytical method in order to the prepare basic data for the safe dismantling of damaged building. ZEUS-NL program was used to analyze the nonlinear behavior of building. As a result, the stress was concentrated to the beam that a column was removed, and as it goes up to higher stories, the moment change of an upper story appeared small and the deflection value also showed similar each other. This may result from hanging action of beams.
서수연(Seo Soo-Yeon),윤승조(Yoon Seung-Joe),윤현도(Yun Hyun-Do),최창식(Choi Chang-Sik),최기봉(Choi Ki-Bong) 한국구조물진단유지관리학회 2005 한국구조물진단학회 학술발표회논문집 Vol.- No.-
A study is performed to analyze the status and research trend of retrofit method used in building structures at Korea. 152 Reinforced Concrete buildings with retrofitted members of 7238 in domestic after 1999 are gathered and reviewed. In addition, literature review about 191 research papers for retrofit of RC structure is performed. Results show that most widely applied retrofit method and target member are wire tension method and flexural member such as beam and slab. respectively. Recently. the use of Carbon Fiber Sheet(CFS) is increasing and many research results concerning it are provided. Therefore, it is recommended to develop an effective method to estimate the structural capacity of retrofitted member with CFS.
서수연 ( Seo Soo-yeon ),윤승조 ( Yoon Seung-joe ),설지희 ( Seol Ji-hee ),김경태 ( Kim Kyoung-tae ) 한국구조물진단유지관리공학회 2007 한국구조물진단유지관리공학회 학술발표대회 논문집 Vol.11 No.1
The basic concept of performance-based seismic design is to design buildings to satisfy the target performance level for earthquake load that may occur during the term of use of those buildings. In such a concept of seismic design, therefore, there has been active research in displacement-based-design method controling that the response is within the given target displacement. Therefore, this paper aims to review the basic concept of displacement-based- design, to apply this to the seismic design of structural R/C shear walls for comparing with design results, and to propose a displacement design-based seismic evaluation method.
흙막이용 H-Pile과 R/C Wall로 구성된 지하합성벽에 관한 해석
서수연 ( Seo Soo-yeon ),윤승조 ( Yoon Seung-joe ),윤용대 ( Yoon Yong-dae ) 한국구조물진단유지관리공학회 2007 한국구조물진단유지관리공학회 학술발표대회 논문집 Vol.11 No.1
H-Piles are generally not used as structural members in the retaining wall system. But this is definitely a economic loss. Composite Basement Wall is combined with H-Pile and resists lateral soil pressure together. In this system, Shear connector as like a stud should be connected to the H-Pile and R/C Wall. Stud connectors are used to combine those member. The flexural capacity of composite basement wall which consists of steel beam and R/C wall is evaluated by non-linear analysis in this study.
화재 피해를 입은 철근콘크리트 보의 전단거동에 관한 실험적 연구
서수연 ( Seo Soo-yeon ),윤숭조 ( Yoon Seung-joe ),김영만 ( Kim Young-man ),최기봉 ( Choi Ki-bong ),정채명 ( Jung Chae-myuong ) 한국구조물진단유지관리공학회 2009 한국구조물진단유지관리공학회 학술발표대회 논문집 Vol.13 No.2
This paper presents experimental result about the shear behavior of RC beam damaged by fire mine parameters in the test are the exposed time to fire and shear span-to-depth ratio. Test result shows that the temperature of fire is mare effective to the strength of specimens then the exposed time. In case of experiencing same exposed time to fire, the variation of shear strength of specimens with different shear span-to-depth ratios in similar to those without fire damage.