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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.
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 ) 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.
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.