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Impact Echo를 이용한 콘크리트 구조물의 내부 결함탐사에 관한 연구
조영상 ( Cho Young-sang ),홍성욱 ( Hong Sung-uk ) 한국구조물진단유지관리공학회 2004 한국구조물진단유지관리공학회 학술발표대회 논문집 Vol.8 No.2
As infrastructures are being deteriorated, non-destructive evaluation of existing structures and construction quality control are increasingly demanded. This paper is to study Flaw detection technique of concrete members using Impact-Echo method. This technique is based on stress wave propagation. Experiments were performed using three types of concrete members that have simulated damages at known locations for tests and analysis. Tests results are evaluated and summarized in this paper
조영상 ( Cho Young-sang ),김국제 ( Kim Gook-je ) 한국구조물진단유지관리공학회 2005 한국구조물진단유지관리공학회 학술발표대회 논문집 Vol.9 No.2
As the social current becomes more diversified and more variable, many necessities are proposed on the financial investment to the existing school facilities and on the improvement of the educational environments. In each step of new construction, extension, maintenance, and mending of the school facilities, most steel-reinforced concrete buildings take too many things to work and are inevitable to proceed the work during the semester, compared to other structural types of the buildings such as steel structures and precast structures, leading to the environmental and safety-related problems. In this paper, the reseawas rch made on the Staggered Truss system, one of the steel structure systems, applying the system to the public school buildings. The Staggered Truss system is suitable to the flexible space of the school building for ‘the 7th Education process’ and excellent to the seismic capabilities.
조영상(Cho Young sang) 학습자중심교과교육학회 2015 학습자중심교과교육연구 Vol.15 No.12
본 연구는 영어를 외국어로 사용하고 있는 학습자가 Lang-8.com이라고 하는 온라인 친화 공간(affinity space)에서 행하고 있는 활동을 살펴보고 그것이 영어쓰기 활동에 미 치는 영향에 대하여 언어학습의 사회문화적 접근법을 이론적 기반으로 하여 조사하였 다. 인터뷰, 관찰, 영작문 샘플 등 다양한 자료를 분석한 결과, 연구대상자는 온라인 친 화 공간이 제공하는 세 가지 요인, 즉, 첫째, 자아를 나타낼 수 있는 소재를 글감으로 사 용할 수 있는 안전한 학습 공간, 둘째, 사회적 상호작용 및 피드백을 제공해 주는 실질적 인 청중의 존재, 그리고 마지막으로, 서로의 다양한 지식을 공유할 수 있는 협업의 가능 성 등으로 인해 영어쓰기에 대한 강한 흥미와 동기를 갖게 되고 이는 활발한 학습 활동 으로 이어지는 것으로 조사되었다. 이러한 온라인 친화 공간이 제공하는 학습 환경의 특 성을 토대로 오프라인 영어수업에서 학습자들의 동기를 유도할 수 있는 방법에 대해 논 의하였다. The present study investigates how one Japanese female English language learner’s participation in an online affinity space, Lang-8.com, influences her engagement with English writing. Sociocultural perspectives on language and literacy are adopted as a theoretical framework to closely examine the participant’s literate and social practices in the online space. The analysis of data (e.g., interviews, fieldnotes, and online journal entries) suggests that the participant is fully engaged in L2 writing for three reasons: 1) safe learning environments to use her own lifeworld identities as writing resources; 2) existence of a real audience for social interactions and authentic feedback; and 3) multiple opportunities for collaboration to share various items of knowledge. Based on these findings, this study discusses some of the possible ways to make English language classrooms more motivating and meaningful for English language learners.
S-BIM 기반 철근콘크리트 구조 매트기초 자동배근시스템 구축에 관한 연구
조영상(Cho, Young-Sang),진현아(Jin, Hyun-Ah),장현석(Jang, Hyun-Suk),홍성철(Hong, Sung-Chul) 대한건축학회 2014 大韓建築學會論文集 : 構造系 Vol.30 No.4
The purpose of this study is to develop an add-in program between the integrated design platform that can produce physical structural model and structural analysis and design model tool which contains the result of structural analysis and design such as member geometry and internal forces. The developed add-in module is to convert the result of structural analysis and design such as structural geometry and internal forces from the analysis to the integrated design platform and to place rebars. The automatic rebar placement system for mat foundation was carried out and as a result, it turned out to be implemented quickly and accurately by applying information derived through structural design. While users can implement rebar placement modeling by using structural drawings in Tekla Structure but it is hard to implement and time-consuming, time and effort for implementation will be reduced if using the automatic rebar placement system. This development is to increase production and economic efficiency by producing accurate shop drawing in the short period of time and generating the accurate quantity take-off of rebar on the reinforced concrete structures.
모의 부재 및 Mock-up 실험을 통한 콘크리트 강도 추정 시스템 구축에 관한 연구
조영상(Cho Young-Sang),김민숙(Kim Min-Suk) 한국구조물진단유지관리학회 2005 한국구조물진단학회 학술발표회논문집 Vol.9 No.2
Securing the required strength of concrete is critical factor in evaluating stability of structure. An accurate and reasonable estimation influences to construction schedule and quality control. But the tests of cylinders and core samples doesn"t represent a whole structure in actuality. So this study is focused on a more accurate estimation using the non-destructive tests. Impact Echo method and SASW method, and artificial neural networks for reliance. Vp and Vr have been achieved in using the non-destructive tests increase as age and there are the relationship between each other. Using Artificial neural networks in parallel can give more accurate estimation than using only non-destructive tests.
모의 부재 및 Mock-up 실험을 통한 콘크리트 강도 추정 시스템 구축에 관한 연구
조영상 ( Cho Young-sang ),김민숙 ( Kim Min-suk ) 한국구조물진단유지관리공학회 2005 한국구조물진단유지관리공학회 학술발표대회 논문집 Vol.9 No.2
Securing the required strength of concrete is critical factor in evaluating stability of structure. An accurate and reasonable estimation influences to construction schedule and quality control. But the tests of cylinders and core samples doesn’t represent a whole structure in actuality. So this study is focused on a more accurate estimation using the non-destructive tests, Impact Echo method and SASW method, and artificial neural networks for reliance. Vp and Vr have been achieved in using the non-destructive tests increase as age and there are the relationship between each other Using Artificial neural networks in parallel can give more accurate estimation than using only non-destructive tests.