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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),전수민(Jeon, Su-Min) 대한건축학회 2017 大韓建築學會論文集 : 構造系 Vol.33 No.1
Recently, a research related to development of form-block has been performed to improve the effectiveness in both construction of new building and retrofit of old building. From several previous prism tests on the form-block wall (FBW), it has been revealed that the concrete filled in the void of the form-block expands to horizontal direction when the compressive load increases and the failure of FBW at ultimate load is governed by the shear failure of web of form-block. This failure brings on weak resistance of wall. In this manner, this paper aimed to verify the compressive strength of the form-block reinforced with steel fiber through both compressive and prism test on the block. In addition, the suitability of previous equation to predict the prism strength of form-block is evaluated. Main parameters in the experiment are type of steel fiber, strength of grout and mortar, and strength of base mortar. As a result, the compressive strength of block and prism strength were improved by adding 1% of steel fiber into block. The ductility of block with steel fiber was improved but was not in prism test. The prism strength of the form-block wall can be properly predicted by using the AIJ equation.
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.
탄소섬유메쉬와 모르터로 전단 보강된 RC보의 거동에 관한 연구
서수연 ( Seo Soo-yeon ),윤승조 ( Yoon Seung-joe ),이우진 ( Lee Woo-jin ),이종규 ( Lee Jong-kyu ) 한국구조물진단유지관리공학회 2004 한국구조물진단유지관리공학회 논문집 Vol.8 No.2
본 연구의 목적은 CFM으로 전단 보강된 보의 실험으로 CFM의 전단 보강 효과를 평가하는 것으로서, 실험 변수는 메쉬의 배치 방향, 정착 클립의 개수, 전단 스팬비이다. 실험에서, 전체적으로 모르터와 RC보에서의 부착 파괴는 가력 초기부터 발생하여 최대 내력의 약 60% 정도에서 완전히 파괴되었으며, 전단 내력에 대한 CFM의 기여도는 CFM 최대 인장 강도의 약 19.6%인 것으로 나타났다. 또한 전단 스팬비가 1.0인 경우 대각선 방향으로 메쉬를 배치할 때 전단 보강 효과가 높은 것으로 나타났으나, 1.5인 시험체의 경우, 정착 클립의 개수가 많을 경우 보강 효과가 높은 것으로 나타났다. The purpose of this study is to investigate shear strengthening effects and behaviour of RC beams strengthened in shear by Carbon Fiber Mesh(CFM) and mortar for fixing CFM to concrete. Test parameters in experiment are shear span-to-depth ratio, layout of CFM and number of clip. From the test, it was shown that the governing failure patten was the bond failure between cover mortar and RC beam initiated at about 60% of maximum strength. And the strength of CFM was developed up to 19.6% of it's maximum tensile strength when the specimen reached to failure. The most effective enhancement using CFM and mortar were to attach CFM diagonally to concrete in a/d of 1.0 and increase the number of cilps in a/d of 1.5, respectively.
서수연 ( Seo Soo-yeon ),윤승조 ( Yoon Seung-joe ),최기봉 ( Choi Ki-bong ),이수민 ( Lee Su-min ),이동화 ( Lee Dong-hwa ) 한국구조물진단유지관리공학회 2007 한국구조물진단유지관리공학회 학술발표대회 논문집 Vol.11 No.2
Various purposes and capacity are needed in order to maintain functions of a building during the using period. But a natural disaster brings a drop of capacity of buildings regardless of human’s effort. Recently, importance of countermeasure in regard to the occurred earthquake is emphasized by bigger shape of earthquake and diversification of earthquake type little by little in the future. The object of this paper is the evaluation of structural capacity of building damaged by disaster. In order to describe the damage, three frame building, five, ten and fifteen story buildings are designed to have reduced column strength in first floor. And static push over analysis for those buildings with various ground conditions is carried out by using RAM PERFORM program. From the analysis, it was shown that seismic capacity of frame building closely depended on the ground condition. The loss of structural capacity of buildings was more influenced by strength reduction of reinforcement than by that of concrete.