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도시철도(서울메트로) 영업운전을 포기할 경우 안전대책방안
장영길(Jang Young-Gil),이계전(Yi Gye-Jean),윤성우(Yoon Sung-Woo) 한국철도학회 2007 한국철도학회 학술발표대회논문집 Vol.- No.-
Since the introduction of the subway, remarkable progress has been made so as to be able to produce a Korean standard electric car, but it is rather regretful that an engineer who is not aware of laws on a railroad or involved in a railroad designed a electric car. In the future, the electric cars with up-to-date technology must be introduced, but there are many difficulties in such introduction. For example, the operation of simultaneously moving and running scores of subway trains must comply with Regulation on Railroad Train Operation, so, close examination of these problems is required. The existing electric car, as does a motorcar, varies a little with makers in the type and characteristics. This paper is intended to discuss about the device and measures for reinforcing a function of Daewoo GEC electric car that was introduced by technical tie-up from England, which accounts for the most ratio in this field.
장영길 ( Young-gil Jang ),임청권 ( Cheong-kweon Lim ) 한국고등직업교육학회 2004 한국고등직업교육학회논문집 Vol.5 No.4
This study investigates nonlinear behaviors of concrete filled steel tubular column (CFT) dependent on various confinement pattern under axial load using ANSYS. For the purpose of evaluating a confining effect of concrete, the 3D finite element method was used. The influence of parametersm width-thickness ratios, strength of the concrete and the yield strength of the steel, were examined. The suggested evalution procedure that assembled three parameters was compared with previous experimental results. The obtained results are summarised as follow. (1) The average restriction stress by the restriction effectiveness of the concrete showed the tendency to be reduced as the width-thickness ratio of the steel pipe section increased. (2) It was turned out as the thing by enduring the load bearing equipment much more as the width-thickness ratio small.