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서수연(Seo Soo-Yeon),윤승조(Yoon Seung-Joe) 대한건축학회 2003 大韓建築學會論文集 : 構造系 Vol.19 No.4
In this paper, the displacement capacity of shear wall designed by strength-based design method is evaluated at the life-safety level. A procedure to evaluate the displacement capacity of coupled shear wall is introduced through an evolution on the Sasani's study(1998). Six shear wall buildings (5, 10, and 15 story), three buildings with isolated shear walls and three buildings with coupled shear walls, are designed according to the strength-based design method(UBC 97). Using the proposed procedure, the displacement demand and capacity of these buildings are evaluated For all cases, shear walls showed displacement capacities higher than demands as well as not exceeding the maximum drift limit, 0.02 (Vision 2000, 1995). In 5 story buildings, especially, this phenomenon was definitely clear. This means that the shear wall building can be designed to have too high displacement capacity when it is designed by the strength-based design method. On comparing with buildings with isolated shear walls and coupled shear walls, the former showed lower displacement demand and capacity than the latter. This change of displacement demand and capacity due to the coupling wall was maximized in 15 story buildings. From this, it is concluded that while the coupling walls can increase the strength and stiffness of building and reduce displacement demand, it also decreases the displacement capacity.
변위기반설계법에 의한 철근콘크리트 전단벽의 내진설계 및 성능평가
서수연(Seo Soo-Yeon),윤승조(Yoon Seoung-Joe),설지희(Seol Ji-Hee) 대한건축학회 2008 大韓建築學會論文集 : 構造系 Vol.24 No.1
The basic concept of Performance-Based Seismic Design(PBSD) 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 into Displacement-Based Design(DBD) so that the response is controlled within the recently given target displacement. This paper aims to review the basic concept of DBD, to apply it to the seismic design of structural R/C shear walls for comparing with design results by the existing seismic design process which is Force-Based Design(FBD) method, and to study the usefulness of DBD in evaluating the seismic capacity of shear wall. Five and ten story shear wall buildings with various aspect ratio are designed by both DBD and FBD, and the results are compared each other. Also seismic evaluation for shear wall structure is performed by using DBD and Capacity Spectrum Method(CSM). The result shows that required base shear calculated by DBD is less than that by FBD. It means that more economic design is possible when DBD is used for seismic design of shear wall structure. In the evaluation of seismic capacity for existing shear wall structure, DBD method requires lower seismic capacity than CSM.
FRP판을 이용한 콘크리트 보강에서 보강방법에 따른 부착성능
서수연(Seo Soo-Yeon),오재길(Oh Jae-Gil),최기봉(Choi Ki-Bong) 대한건축학회 2011 大韓建築學會論文集 : 構造系 Vol.27 No.8
Recently, FRP (Fiber Reinforced Polymer) has been widely applied in retrofit of concrete member owing to its ease construction and high structural capacity compared to other materials. External Bond Retrofit (EBR) using FRP sheet or plate is most popular method for flexural retrofit of concrete member. In strengthened concrete member using this method, however, problems such as dismantling of FRP were founded after retrofit. This causes a strength reduction of the retrofitted member. To resolve this problem, Near-Surface-Mounted Rertofit (NSMR) method was developed and being studied. In this paper, bond capacities of EBR and NSMR using FRP plate were studied experimently and results were compared each other. Main variables in the test were retrofit method, bond length and existence of shear key. From the test results, it was found that the member strengthened by NSMR had almost 1.5 times higher bond strength than that by EBR. The contribution of shear key was not observed when the splitting failure of concrete governed.
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.