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H형강 기둥의 약축에 대한 기둥-보 접합상세 개발 및 내력평가
김상섭,이도형,함정태,김규석,Kim, Sang Seup,Lee, Do Hyung,Ham, Jeong Tae,Kim, Kyu Suk 한국강구조학회 2004 韓國鋼構造學會 論文集 Vol.16 No.1
One of the most influential elements is the moment resisting beam-to-column connection vis-a-vis the behavior and cost of multistory steel building frames. Majority of these connections are column flange connections attached to beam frames. This is called strong-axis connection. Another type of moment resisting connection commonly found in building frames is the web axis connection. In this type of connection, the beams are attached to the plane of the column web perpendicularly. It is called the weak-axis beam. and it tends to bend the column at its weak axis. In this study, some of the fundamental behaviors of beam-to-column connections were examined by changing the connection details as weil as comparing them with previous connection details. This study sought to develop the details in the beam-to-column connection in the weak axis for middle- and low-rise steel construction systems. 강구조 기둥-보 접합부에 대한 연구는 그동안 국내외에서 오랜 기간 연구가 진행되어 내진성능 및 집합부의 강도를 개선시킬 수 있는 많은 접합 디테일이 개발되어 사용 중에 있으나, 현재 국내에서는 시공성을 고려하여 기존의 브라켓 형식의 접합부를 선호하고 있다. 본 연구에서는 약축 접합부의 연성적인 거동을 확보하면서 시공이 편리한 기둥-보 접합부를 실험과 이론해석을 통해 개발함으로써 철골구조시스템이 중저층 건물에도 사용할 수 있도록 하는데 그 목적이 있다. 또한 약축에 대한 기둥-보 접합부의 구조설계 및 시공에 필요한 기초 자료를 제시하고자 한다.
루소에 있어서 사적 가정교육과 공적 시민교육의 통합문제
김상섭 교육철학회 2003 교육사 교육철학 Vol.29 No.-
Against the popular opinions that Rousseau advocates with the motto "back to nature" only the private education this paper tires to make evident the ambivalent character of the concept "nature". Look back is namely to identify with look forward Nature means rather a rational reconstructed practical idea ( the second nature) for the analysis of the present society than a initial state (the first nature) of the mankind. This idea of the "nature" enables me to understand Rousseau's thoughts of the natural education as a dialectical combination of the private and public education, which I explain here with the idea of the "education of the freedom and for the freedom". Education as humanization of the human being is possible and inevitable because man is enable to make himself perfect. It can be then actual only when the natural freedom grows to be the moral freedom according to the education and the social contract (general will) respectively, in other words, when the private education stands in connection with the public education.
김상섭 이화여자대학교 한국문화연구원 2004 한국문화연구 Vol.7 No.-
In the education a series of ‘collapses’ is in everyone’s mouth:‘classroom collapse’, ‘school collapse’ and ‘the end of education’. Among them the ‘schoolroom collapse’ will be treated here not only anthropologically but also practically. Anthropologically interpreted, the classroom is regarded as the occurrence place where human excellence is to call into question, which should bring about the original relationship with his world. It will be here characterized and explained through three moments of the spontaneous anamnesis aided by the Socratic didactics of questioning:experience of limits(aporein), turning from the opinion back to the truth and common inquiry. The classroom should be anthropologically collapsed if the true existence of the human being, which consists of knowing the good, couldn’t occur. On the contrary the schoolroom can be interpreted as a social sub-practice which is enabled and enacted by two constitutive principles:belief in perfectibility and demand for spontaneity of the child. The schoolroom, once established as an independent area of general social practice, has no other alternative but to have active, mutual relations with other social practices, if it will further function independently. Unfortunately it could always be dependent on other social practices, penetrated or ruled by those aims and purposes. If it failed for the constitutive principles to stand for the classroom, there would be no more place where a social sub-practice named education takes place, long before it really collapses down. ‘교실붕괴’현상에 관한 논란들은 긴급하게 교실의 조건에 대한 물음과 답변을 요구한다. 그에 따라 여기서는 교실을 교실이 되게 하는 것, 즉 교실의 인간학적 존재의미(2장)와 실천학적 존재양태(3장)를 해명하려고 시도한다. 플라톤의 인간학에 따를 때 교실은 선을 향한 해방자로서의 실존이 발생하는 장이다. 다시 말하면 우리를 사로잡고 있고 진정한 실존을 가로막고 있는 무지로부터 해방을 얻으려는 영혼의 간단없는 투쟁의 현장이다. 그에 반해 실천학적으로 고찰할 때 교실은 인간의 형성가능성에 대한 믿음에서 출발하여 그의 자발성을 촉진하는 구체적인 실천으로 구성된다. 그것은 나아가 사회의 제(諸)실천들을 ‘교육적 관점’에 따라 수용하고 변경하며 나아가 그들에게 균형 있고 조화로운 상호작용이라는 ‘교육적 관심’을 제공하는 역사적 실천의 장으로 존재한다.
고력볼트의 길이-직경비 및 여유나사길이에 따른 조임력 평가 연구
김상섭,김성용,김규석,Kim, Sang Seup,Kim, Sung Yong,Kim, Kyu Suk 한국강구조학회 2000 韓國鋼構造學會 論文集 Vol.12 No.3
마찰접합에 있어서 작용외력은 고력볼트로 체결된 접합부재간의 마찰면에 작용하는 마찰력에 의해 전달된다. 이 마찰력은 마찰면의 미끄럼계수와 고력볼트 조임력의 곱에 비례한다. 그러나 너트회전법에 의한 조임시 고력볼트 조임력은 많은 인자에 의해 영향을 받는다. 여유나사길이와 길이-직경비는 고력볼트 조임력을 지배하는 중요한 인자 중에 하나이다. 따라서 본 논문은 여유나사길이와 길이-직경비에 따른 고력볼트 세트(F10T, M16, M20, M22, M24)의 기계적 특성에 관한 실험을 통하여 고력볼트의 정확한 체결 방법을 제공하고자 한다. In the friction-type joints the external applied load is transmitted by frictional force acting on the contact area of the plates fastened by the high strength bolts. This frictional force is proportional to the product of the bolt clamping force and slip coefficient of the faying surface. But the bolt clamping force is dependent on many factors when the turn-of-nut method is used. The preserved thread length and length-to-diameter ratios are one of the major factors governing the bolt clamping force. This paper presents the correct method of high strength bolt tightening through the experiment on the mechanical properties on sets of high strength bolts in accordance with preserved thread length and length-to-diameter ratios.
스퍼터링 증착에 의한 $PbTiO_3$ 박막제조시 증착변수의 영향
김상섭,강영민,백성기 한국세라믹학회 1993 한국세라믹학회지 Vol.30 No.7
Highly c-axis oriented ferroelectric PbTiO3 thin films were deposited on MgO single crystal substrates by RF magnetron sputtering. We have studied the effects of substrate temperature, RF input power, gas comosition, gas pressure and deposition rate on the chemical and structural characteristics of PbTiO3 thin films. The epitaxy relationship of c-axis oriented films was found to be PbTiO3{100}//MgO(100) and their microstructures were highly mosaic. It was found that the most important parameter to achieve epitaxial PbTiO3 films was the substrate temperature. The activation energy for the epitaxy formation was about 0.92eV. Lower gas pressure and RF input power were favorable for the formation of epitaxial c-axis orientation. It was also found that the optimum oxygen content in Ar gas was 10% to obtain the stoichiometric PbTiO3 composition.