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최현기(Choi Hyun-Ki),김준서(Kim Jun-Seo),최윤철(Choi Youn-Cheul),최창식(Choi Chang-Sik),백영수(Back Young Soo) 대한건축학회 2007 대한건축학회 학술발표대회 논문집 - 계획계/구조계 Vol.27 No.1
Flat plate slab has been widely used in high rise buildings for its remarkable advantages. However, punching shear failure has become increasingly important issue with the spread of flat plate slab. A flat plate-column connection is susceptible to brittle punching shear failure, which may result in the necessity of shear reinforcement. In previous, experimental tests were performed to study the capacity of slab-column connections strengthened with various shear reinforcement, and the capacity of the specimens with curve steel reinforcement, experimental studies was performed. The results of an experiment program on punching shear performance of RC slab-column connection are presented in this paper. Specimens were full-scale representations of a one-story slab in a Korean apartment. The test results showed that failure mechanism of specimens governed by shear fracture and the strength of specimens were different according to the retrofitting strategies.
횡 하중 작용시 곡선형 철근으로 보강된 RC 플랫 플레이트 외부 접합부의 구조성능에 관한 실험적 연구
최현기(Choi Hyun-Ki),김준서(Kim Jun-Seo),최윤철(Choi Youn-Cheul),최창식(Choi Chang-Sik) 대한건축학회 2007 대한건축학회 학술발표대회 논문집 - 계획계/구조계 Vol.27 No.1
Flat plate slab has been widely used in high rise buildings for its remarkable advantages. However, punching shear failure has become increasingly important issue with the spread of flat plate slab. The results of an experiment program on punching shear performance of RC slab-column connection are presented in this paper. Specimens were full-scale representations of a one-story slab in a Korean apartment. The test results showed that failure mechanism of specimens governed by shear fracture and the strength of specimens were different according to the retrofitting strategies.
최현기(Choi Hyun-Ki),김준서(Kim Jun-Seo),최윤철(Choi Yun-Cheul),백영수(Back Young-Soo),진언식(Jin Eon-Sik),최창식(Choi Chang-Sik) 대한건축학회 2008 大韓建築學會論文集 : 構造系 Vol.24 No.8
There are many in utilizing the flat plate structure in reinforced concrete building. This structure has drawbacks as well because the structure is vulnerable to a punching shear failure at the column connections. This research is an experimental study on full-scale interior slab-column connections of flat-plate. Three types of shear reinforcements were proposed to prevent brittle punching shear failure that could result in collapse of whole flat plate structures. A series of four flat plate specimens including a specimen without shear reinforcement and three specimens with the reinforcements was tested. The dimension of the slabs was 2620*2725* 180㎜ and the specimens had a 600*800㎜ square column at the center of the slabs. The slabs were tested up to failure using monotonic vertical shear forces. The presences of the shear reinforcements substantially increased punching shear capacity and ductility of the interior slab-column connections.
도래하는 "대조선(大朝鮮)", 귀환하는 "영지(靈地)" - 최남선 『조선유람가』의 문화정치학 -
최현식 ( Hyun Sik Choi ) 한국시가학회 2014 韓國 詩歌硏究 Vol.37 No.-
이 글은 최남선의 『조선유람가』(1928)의 문학사적·문화정치학적 가치와 의미를 동시에 제고하기 위해 작성된다. 장편창가 『조선유람가』는 1920년대 중반 ‘조선주의’와 ‘불함문화’를 널리 표방하기 위해 작성된 시조집 『백팔번뇌』와 기행문 『백두산근참기』 『심춘순례』 「풍악기유」(『금강예찬』) 등에 비해 비교적 덜 알려져 있다. 『조선유람가』는 당시로서는 퇴조기에 접어들던 ‘영사’ 형식을 빌려, ‘대조선’의 영웅과 역사, 인문과 자연 등을 예찬하는 장편창가, 곧 ‘만들어진 전통’이었다는 것이 본고의 입장이다. ‘대조선’의 소환은 서사시적 과거의 기억과 현재화, 그를 통한 조선적 정체성의 확립과 미래로의 투기를 도모하는 탈식민 혹은 저항의 문화정치학이었다. 요컨대『조선유람가』는 실제 여행과 그에 대한 정서의 기록과 표출을 목표하는 시조집이나 기행문과 달리, 과거(역사)와 지리 정보를 자유롭게 통합, 배치함으로써 ‘조선주의’의 폭넓은 확장과 심화를 달성할 수 있을 것으로 상상되고 기대되었다. 본고는 이런 사실들을 논구하고 증명하기 위해 ≪동아일보≫본 『조선유람가』와 이를 수정·보완한 한성도서본 『조선유람가』를 비교 분석하였다. 특히 전자에 수록되었으나 후자에서 탈락한 경성의 창경원 부분, 후자에 보충된 측우기, 활자등을 중심으로 경성과 궁궐을 둘러싼 공간의 지배를 향한 일제의 식민주의 및 그에 대한육당의 탈식민적 저항의 면모를 주의 깊게 살펴보았다. 또한 『조선유람가』의 핵심으로 생각되는 백두산과 영웅 서사, 당시 조선 투어리즘의 핵심 장소 금강산과 경주에 대해서도 복합적으로 검토했다. 먼저 이것들을 ‘조선주의’와 ‘불함문화’의 근원적 장소로 예찬하는 육당의 심미적 시선과 태도를 주목했다. 또한 이것들을 식민지의 폐허화된 유물 내지 식민지 본국의 성스러운 자연에 비해 그 가치가 미약한 공간으로 바라보았던 일제의 식민주의적 시선 역시 고찰함으로써 육당의 탈식민적 문화정치학의 가치를 입체화하고자 했다. 마지막으로 함께 실린 요약본 창가 『조선유람별곡』을 살펴봄으로써 육당이 조선의 역사와 영웅, 자연 등의 우수함을 대중들이 보다 쉽게 체득할 수 있도록 노력했음을 다시 한번확인하고자 했다. This article is written to consider the value and meaning of Choi, Namsun`s Josun-Yuramga(1928) from the viewpoint of history of literature. Josun-Yuramga, a full-length changga, is known relatively less than the sijo collection, Baekpalbeonnoe, or travel literature, Baekdusan-Geunchamgi, Simchun- sunrye, or "Pungakgiyu"(Geumgangyechan) written in order to publicize the mid-1920`s ‘Josunjuui’ and ‘Bulham Culture’ widely. This researcher sees that Josun-Yuramga was a full-length changga, that is, ‘made tradition’ to admire the heroes, history, humanities, or nature of ‘Daejosun’ adopting the form of ‘Yeongsa’ that went into decline then. The calling of ‘Daejosun’ was the cultural politics of either postcolonialism or resistance to establish the identity of Josun and promote speculation for the future through the epic poem-based recalling of the past and realization of it in the present. As a matter of fact, unlike sijo collections or travel literature intended to write about and express real traveling or emotion towards it, Josun-Yuramga was imagined and expected to integrate and arrange the past (history) and geographical information freely and attain the wide-range extension and deepening of ‘Josunjuui’. To discuss and verify these points, the current study comparatively analyzed Donga-Ilbo-edition "Josun-Yuramga" and Hanseong Doseoedition "Josun-Yuramga" which edited and complemented the former. Especially centering around the part of Changgyeongwon in Gyeongseong contained in the former but deleted in the latter or the part about Cheukugi or Hwalja complemented in the latter, the study profoundly examined Japan`s colonialism pursuing the ruling of space around Gyeongseong and the palace and Yukdang`s postcolonialistic resistance against it. In addition, it complexly investigated Baekdu Mountain and heroic narratives regarded to be the core part of "Josun- Yuramga" and also Geumgang Mountain and Gyeongju, the major tourist sites in Josun at that time. First, the researcher noticed the aesthetic eye and attitude of Yukdang praising these as the sourceful places of ‘Josunjuui’ and ‘Bulham Culture’. Also, considering the colonialistic eye of Japan regarding these as the ruined relics of its colony or space with much less value than the divine nature of the owner country, the study intended to examine Yukdang`s postcolonialistic value of cultural politics multilaterally. Lastly, by looking into "Josun-Yurambyeolgok" along with it, the researcher tries to reconfirm that Yukdang attempted to help the people to acquire the excellence of Josun`s history, heroes, or nature more readily.
전단보강된 플랫 플레이트-기둥 외부접합부의 불균형 모멘트 강도
최현기(Choi Hyun-Ki),최윤철(Choi Yun-Cheul),최창식(Choi Chang-Sik) 대한건축학회 2009 大韓建築學會論文集 : 構造系 Vol.25 No.8
Flat plate slab has been widely used in high rise buildings for its remarkable advantages. However, punching shear failure has become increasingly important issue with the spread of flat plate slab. The intend of this research was to study the response of slab-column connections containing various types of shear reinforcement when subjected to combined gravity and cyclic lateral loading. The three test specimens were full-scale representations of exterior slab-column connections in a prototype Korea apartment building. The control specimen had no shear reinforcement, while the other specimens had CS-Bar(Curve steel) and SS-Bar(Curve steel) as shear reinforcement. The control specimen failed due to punching shear around the slab-column connection at 4.0% drift. None of the shear reinforcement specimen experienced punching failure during testing to 4.4% drift. The estimation for experimental data using the equation of ACI318-05 and CEB-FIP MC 90 represented the problem of application for eccentric shear stress and unbalanced moment. According to the variable analysis, it is needed to consider the variation of reinforcement ratio within effective width of slabs.