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서수연 ( Seo Soo-yeon ),윤승조 ( Yoon Seung-joe ),윤현도 ( Yun Hyun-do ),최창식 ( Choi Chang-sik ),최기봉 ( Choi Ki-bong ) 한국구조물진단유지관리공학회 2005 한국구조물진단유지관리공학회 학술발표대회 논문집 Vol.9 No.1
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.
일사량을 고려한 상부슬래브의 온도하중에 대한 거동 특성
서수연(Seo Soo-Yeon),조용만(Cho Yong-Man),김경태(Kim Kyong-Tae),윤승조(Yoon Seung-Joe),윤현도(Yun Hyun-Do),최기봉(Choi Gi-Bong) 대한건축학회 2007 대한건축학회 학술발표대회 논문집 - 계획계/구조계 Vol.27 No.1
The purpose of this study is to perform an experiment to determine how much the temperature stress that works on roof slab due to differences in temperature on the surface of structure, may have effects on the long-term behaviors of structure, and thereby provide a useful reference material for measuring the serviceability of architectural structures. Based on actual survey data from Korea Meteorological Administration (KMA), the experiment is planned by calculating differences in the surface temperature of the structure in terms of insolation, as well as getting differences in temperature distribution of the upper slab structure. Next, the results are converted into cyclic temperature stress. The stress is applied to structures, depending on each experimental variable. Test result showed that the stiffness at nonlinear region after the experiment temperature stress of 20years.
강한 기둥-약한 보로 설계된 철근 콘크리트 골조구조의 변형성능 평가에 관한 연구
서수연 ( Seo Soo-yeon ),이리형 ( Lee Li-hyung ),진세옥 ( Chin Se-ok ),최윤철 ( Choi Yun-chul ) 한국구조물진단유지관리공학회 2003 한국구조물진단유지관리공학회 논문집 Vol.7 No.4
최근 성능에 근거한 설계법의 개발과 더불어, 변위설계에 대한 관심이 증가하고 있다. 본 연구에서는 다층 RC 골조의 변위성능을 보다 정확하게 평가할 수 있는 방법을 제시하고자 한다. 이를 위해, 골조의 횡변위를 계산하기 위해서 보와 기둥의 변형뿐만 아니라 정착부와 조인트 부분의 변형을 변위 산정시 고려하였다. 기존의 실험 및 계산결과의 비교로부터, 본 연구에서 제시한 방법의 적합성을 확인하였고, 이를 강한 기둥-약한 보의 설계개념을 설계된 다층 RC골조 건물에 적용하여 그 거동을 예측하였다. 그 결과, 보다 정확한 건물의 변위성능을 평가하기 위해서는 정착부와 조인트의 변형을 반드시 반영하여야 하는 것으로 나타났다. Recently, the concern for displacement-based design has been increased as a performance based design method in which the deformation capacity of structure becomes so important. In this paper, a process is presented to accurately evaluate the deformation capacity of multistory RC frame structure. In the calculation of drift of frame, the deformation of beam and column as well as the deformation of anchorage and joint are considered. From the comparison between previous test and calculation results, the usefulness of the process is verified. The proposed process is also applied to the multiple story RC frame buildings(5, 10, 15 stories) designed to have strong column-weak beam. The results showed that the deformation capacity of the buildings could be not properly evaluated when deformations of anchorage and joint were ignored.
CFS로 휨 보강된 RC부재의 보강겹수에 따른 구조성능 변화
서수연(Seo Soo-Yeon),김경태(Kim Kyong-Tae),윤승조(Yoon Seung-Joe),윤현도(Yun Hyun-Do),최기봉(Choi Gi-Bong) 대한건축학회 2008 大韓建築學會論文集 : 構造系 Vol.24 No.2
Strengthening method using carbon fiber sheets have been developed for the rehabilitation of structures and applied to the concrete member. However, it is still questionable whether their structural capacity has been well kept without any deterioration as time goes. According to a few inspection results about RC buildings with retrofitted members by CFS, there have been found loss of strengthening using CFS because of the detachment of CFS from the concrete face, which causes the bond failure of CFS. The appearance of this loss may be initiated at just after retrofit construction. And it will be more serious when the layer number of CFS increases. In order to minimize above mistake in retrofit design using CFS, more exact evaluation process to predict the bond loss of CFS is required. The final objective of this research is to propose the guideline and method for estimating resistance capacity of strengthened structure as time goes by. In this paper, as a first step, previous equations to predict flexural strength of member retrofitted by CFS are analyzed and evaluated through a test work. And a nonlinear sectional analysis is performed using a commercial analysis program. In experimental work, specimens with the amounts of carbon fiber and strengthening method as test parameter are tested and their behavior is discussed. From the test, the flexural capacity was not linearly increased even if the layer number of CFS increased when it was more than two. The overall nonlinear behavior of RC member retrofitted with CFS could be suitably predicted by the analytical process in this paper by considering the bond loss.
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.