백석 문학의 전체성에 대하여

최동호(Choi, Dong?ho) 한국비평문학회 2012 批評文學 Vol.- No.46

This paper aims to have a bird’s?eye view on Baek, Seok’s works who has reached the 100th anniversary and avoid the mistake of looking into the parts and not the whole. Paek, Seok was born at Jeong?ju, Pyeong?buk on July 1912 and lived a life of extreme ups and downs. He made his literary debut through annual spring literary contest of Chosun Daily newspaper on January 1930 when he was 19 and finished his publication of works with ‘Naruteo’(Ferry) on May 1962. After he went to a cooperative in Gwanpyong?ri, Samsoo?gun leaving the central literary circle on January 1959, he lived as a shepherd for more than 30 years of his later part of life. Having been brought into sudden prominence in the literary circle with his poem book Saseum(Deer) in 1936, Paek, Seok kept his literary reputation as a writer of juvenile stories by publishing fairy poem book Jipgene Ne Hyongje(Four Brothers of the Hermit Crabs, 1957) in the North Korea. However, he had to focus on children’s literature without the freedom of writing and he could not be reinstated to Pyongyang after he had received the ‘Red Letter’ in 1959. Referred as a genius poet, however, his life was ended tragically without beingable to write what he wanted to and criticized for his lack of loyalty and ‘vestige of bourgeois.’ Total unearthed poems of Paek, Seok are 148 including recent ones discovered by Song, Joon. More of his unearthed works will be included later. His proses are total 44 with the variety of novel, essay, review, political comment, translation, etc. He focused more on translation in the North Korea and they are 197 works of translated modern poems and 11 works of fairy poems. He translated 4 long novels including Silent Don 1, Silent Don 2 and 1 collected short novel and 2 short novels. Silent Don recently discovered with the help of professor Yoon, Hae?yeon is more than 1,000 pages and has an importance as the first direct translation fro Russian into Korean by Bake, Seok. More works of him will be unearthed as time goes on. However, with those newly unearthed works, the study on Baek, Seok’s literature has already reached a new phase. Now researchers have to include those works written in the North Korea. Unearthing the texts of important poets such as Baek, Seok is very meaningful for the study of modern Korean poetry. Considering the process of unearthing his works until now, more of his translated works will be found. However, his own creation has less possibility of being included in the list. Though there will be the difficulties such as the division of Korea into south and north, researchers should be able to get over them to continue the study of Baek, Seok.

강바닥판 종리브와 횡리브 교차부의 피로거동에 대한 종리브내 다이아프램의 영향

최동호,최항용,최준혁,Choi, Dong Ho,Choi, Hang Yong,Choi, Jun Hyeok 한국강구조학회 2000 韓國鋼構造學會 論文集 Vol.12 No.3

본 연구에서는 강바닥판의 실물 대형시험체를 제작하여 정적시험 및 피로시험을 실시하였다. 정적 및 영향면 재하시험 결과를 통하여 다이아프램의 유무에 따른 강바닥판 슬릿부의 면내와 면외응력을 검토하였으며, 피로시험결과로부터는 강바닥판의 피로거동, 피로균열의 발생과 진전에 대한 연구를 수행하였다. 다이아프램이 설치된 상세는 설치되지 않은 상세에 비하여 지점조건에 상관없이, 종리브 횡리브 교착부의 종리브측으로는 약 50%의 응력경감효과가 있으나, 횡리브측 하단부에는 오히려 상당히 큰 응력을 야기함을 알 수 있었으며, 피로균열 진전해석결과로부터는 슬릿부의 노치에 의한 초기균열길이가 피로균열성장에 상당한 영향을 끼치고 있음을 알 수 있었다. 측정자료와 FEM 해석을 통하여 공칭응력과 핫스폿응력에 의한 피로강도를 추정한 결과, 다이아프램이 설치되지 않은 상세는 규정된 피로등급에서 안전한 것으로 판단되나 다이아프램이 설치된 상세는 피로등급이하의 거동을 보였다. This study investigates the mechanical behavior on trough rib to crossbeam joint in orthotropic steel plate decks, specially emphasizing on the effect of diaphragm inside trough rib on the fatigue behavior of slit by static and fatigue tests. In particular, the effects of diaphragm on in-plane stress and out-of-plane stress, stress concentration, propagation of fatigue cracks at the silt are studied. With the result of experiment and numerical analysis, we have estimated the fatigue strength using the nominal stress and hot-sport stress. The details with diaphragm have occurred about 50% stress reduction at trough rib part of trough rib to crossbeam joint than the detail without diaphragm, however, the lower parts of crossbeam have occurred much more stress. Initial crack size or slit have an considerable influence on the propagation of fatigue cracks due to V-notch. The fatigue strength category of the details without diaphragm has higher value than fatigue limit, whereas that of the details with diaphragm is estimated lower than fatigue limit.

일축압축을 받는 직교로 보강된 판의 좌굴강도

최동호,장동일,최항용,Choi, Dong Ho,Chang, Dong Il,Choi, Hang Yong 한국강구조학회 1998 韓國鋼構造學會 論文集 Vol.10 No.4

직교로 보강된 판은 효율적인 하중분배능력과 좌굴안정성 때문에 장대교량의 강상판으로 사용되고 있다. 본 연구에서는 일축압축을 받는 직교로 보강된 판의 좌굴강도를 해석적 방법으로 추정하였다. 판이론을 사용하여 전체좌굴 및 부분좌굴과 같은 여러 모드에서의 좌굴응력식을 유도하고, 좌굴강도에 대한 횡리브와 종리브의 강성과 개수 등의 효과를 보이기 위하여 매개변수해석을 수행하였다. 정량적인 해석을 통해 종리브와 횡리브의 강성과 간격의 영향을 보였다. Orthogonally stiffened steel plates are used for orthotropic steel decks of long-span bridges because of high degree of flexural and torsional resistances and good load-distribution behavior. An analytic study is presented for evaluating the buckling strength of orthogonally stiffened plates subjected to uniaxial compression. By using the plate theory, the buckling stress under overall and partial buckling modes, is derived. Parametric studies are performed to show the effects of the stiffness and the number of transverse and longitudinal ribs on the buckling strength. The results show quantitatively strong influence of stiffness and spacing of longitudinal and transverse ribs.

승강기문, 방화유리창 성능기준 개선방향에 관한 연구

최동호,김대회,서희원,박수영,Choi. Dong Ho,Kim. Dae Hoi,Seo. Hee Won,Park. Soo Young 한국방재학회 2013 한국방재학회논문집 Vol.13 No.1

화재시 건물내의 연소확대를 방지하기 위한 방화구획 선상, 피난통로, 승강기 탑승 로비 등에는 방화문, 승강기 등을 설치하기 위한 개구부가 위치하게 된다. 건축물에서의 연소확대는 이와 같은 개구부를 통하여 이루어지기 쉬우므로 설치되는 개구부 방호 설비에 대한 관련 기준의 정비 및 보완이 중요하다. 특히 과거와는 달리 건물의 고층화, 대형화에 따라 피난용도로 사용되는 승강기의 용도가 중요시 되고 있으며, 이에 따른 승강기문에 대한 화재안전성이 요구되고 있으며, 또한 방화문 등에 설치되는 방화유리창도 화재시 연소확대방지를 위한 검토가 필요하다. 이에 본 연구에서는 외국의 방화용 승강기문과 방화유리창에 대한 성능기준을 검토하여 국내 관련 성능기준을 설정하기 위한 기초자료를 제시하고자 하였다. The openings for fire doors and elevator doors are installed on fire compartment to stem fire spreading, evacuation passage and elevator hoistway in building. Fire spreading tend to grow through these openings, so it is important to organize the standard related to opening protectives. Unlike in the past, due to being tall and large, the elevator for evacuation is being more important. For this reason, it is required for elevator door to be safe in fire and it is necessary for the glazing installed on fire doors to be reviewed with respect to fire spreading. In this study, foreign performance criterion of the fire elevator door and the fire-protection-rated glazing were reviewed and the base data for improving way about the fire performance criteria were suggested.

충돌하중을 받는 U-채널 교량 측보의 구조적 안정성에 관한 연구

최동호,나호성,이광원,Choi,Dong-Ho,Na,Ho-Sung,Lee,Kwang-Won 한국방재학회 2008 한국방재학회 학술발표대회논문집 Vol.2008 No.1

U-Channel Bridge is effective bridge type, because its edge beam performs role of barrier and enables to reduce additional dead loads. Nevertheless, there is possibility of bridge collapse under impact load due to car crash. Also, edge beam must have ability to induce safe driving and prevent falling accidents. Therefore, this study carries out analysis of behavior of edge beam and slab and evaluation of structural stability under impact loads, based on Korean Highway Bridge Design Specifications and AASHTO LRFD Bridge Design Specification. According to analysis result, the maximum stress of edge beam and slab satisfies specification of allowable stress.

단면감소를 고려한 파이프의 좌굴에 관한 연구

최동호,고영찬,권순길,이종선,Choi, Dong-Ho,Ko, Young-Chan,Gwon, Sun-Gil,Lee, Joung-Sun 대한토목학회 2013 대한토목학회논문집 Vol.33 No.3

본 연구에서는 부식이나 보강재가 고려된 비균일한 두께를 가지는 파이프라인에 대하여 일정한 외압을 받을 때의 탄성 좌굴하중을 이론적으로 산정하였다. 길이가 매우 긴 원통형 쉘 구조물인 파이프라인을 단순한 링 구조물로 가정하였고, 고유함수를 유도하여 좌굴 임계하중을 산정하였다. 또한, 두께 변화와 두께가 감소된 구간의 범위에 따른 변수해석을 수행하였다. 이론식에 의해 산정된 좌굴 임계하중 결과를 유한요소해석 결과와 비교하여 검증하였고, 두 결과는 잘 일치함을 알 수 있었다. This paper proposes a theoretical solution of elastic critical buckling load of infinitely long pipelines with non-uniform thickness under external pressure. The non-uniform cross section of pipelines can be considered as corroded or stiffened pipelines so that this paper can be a fundamental research of pipelines that are essential technology for offshore industries. The theoretical solution of pipelines with non-uniform thickness is derived with an assumption that a cylindrical shell under external pressure can be considered as a simple ring. The eigenfunctions are derived to obtain the critical buckling load. The reduced thickness and the reduced range are considered as variables in parametric analysis. The finite element analysis is performed to verify the theoretical solutions and the results of the analytic method and the finite element method are in good agreement.

100작품 - 개념의 건축화된 4카테고리 스케치 (우주.내용과 형식. 미메시스. 별자리)

최동호,Choi, Dong-Ho 대한건축사협회 2012 建築士 Vol.2012 No.2

기고 - 서양 건축미 개념의 역사적 전개 연구 _ 아네르 테트라고노스와 아르카디아

최동호,Choi, Dong-ho 대한건축사협회 2017 建築士 Vol.580 No.-

작품노트 - 향단 이데아

최동호,Choi, Dong-Ho 대한건축사협회 1999 建築士 Vol.1999 No.11

가상축력을 이용한 좌굴해석 및 HSB800 강재를 적용한 사장교에 대한 적용성 분석

최동호,유훈,권순길,임지훈,Choi, Dong Ho,Yoo, Hoon,Gwon, Sun Gil,Lim, Ji Hoon 한국강구조학회 2017 韓國鋼構造學會 論文集 Vol.29 No.1

사장교의 부재별 임계좌굴하중 산정에는 일반적으로 시스템 좌굴해석이 사용된다. 그러나 기존의 시스템 좌굴해석은 압축력이 미소한 부재에 대하여 과도하게 긴 유효좌굴길이를 산정하는 문제점을 내포하고 있다. 본 연구에서는 가상축력을 이용하여 강사장교 부재의 유효좌굴길이를 합리적으로 결정할 수 있는 좌굴해석 방법을 제안하였다. 또한, 수정된 유효접선탄성계수를 이용한 개선된 비탄성 좌굴해석방법을 제시하였다. 제안방법을 예제 사장교 모델에 적용하여 해석결과를 기존의 좌굴해석 방법과 비교 검증하였다. 검증결과, 제안된 방법은 강사장교 거더와 주탑의 유효좌굴길이를 합리적으로 예측할 수 있었다. 그리고 거더와 주탑에 일반강재 대신 HSB800 강재를 적용하였을 경우, 가상축력을 고려하지 않은 제안된 비탄성 좌굴해석에서는 유효좌굴길이가 축력이 작은 부분에서 약간 감소하였으나, 가상축력을 적용한 제안된 비탄성 좌굴해석에서는 유효좌굴길이의 변화가 거의 나타나지 않았다. System buckling analysis is usually used to determine the critical buckling load in the buckling design of cable-stayed bridges. However, system buckling analysis may yield unexpectedly large effective lengths of the members subjected to a relatively small axial force. This paper proposes a new method to determine reasonable effective lengths of girder and tower members in steel cable-stayed bridges using fictitious axial forces. An improved inelastic buckling analysis with modified tangent modulus is also presented. The effective lengths of members in example bridges calculated using the proposed method are compared with those obtained using the conventional buckling analysis method. The proposed method provides much more resonable effective lengths of the members. When girder and tower members are built with HSB800 steel instead of conventional steel, the effective lengths of the members under a small axial force slightly decreases in the inelastic buckling analysis without fictitious axial forces, while the proposed method that considers fictitious axial forces provides almost no changes in such lengths.