http://chineseinput.net/에서 pinyin(병음)방식으로 중국어를 변환할 수 있습니다.
변환된 중국어를 복사하여 사용하시면 됩니다.
강영종,임남형,신정렬,양재성,Kang, Young Jong,Lim, Nam Hyoung,Shin, Jeong Ryol,Yang, Jae Seong 한국강구조학회 1999 韓國鋼構造學會 論文集 Vol.11 No.3
수십 년 동안, 철도는 차량의 운영과 조작 기술에 맞추어 짧은 길이의 레일을 서로 신축 이음을 두고 연결한 궤도를 이용하여 건설되었다. 그러나 이러한 신축이음들은 궤도 손상과 유지비 증가 등의 많은 단점들을 유발시켰다. 그래서, 철도 기술자들은 차량, 용접, 체결의 기술이 발전함에 따라 열차 하중, 속도의 증가를 위해 레일 사이의 신축 이음을 제거하는 데 많은 관심을 가지게 되었다. 그래서 최근 등장한 것이 기존 레일의 단점들을 해소할 수 있는 CWR궤도이다. 그러나 이러한 CWR궤도는 기존 레일의 단점을 극복할 수 있었으나 레일의 장대화에 따른 온도 하중으로 인한 레일의 좌굴 문제를 야기시켰다. 본 논문에서는 유한 요소 해석을 이용하여 선형 좌굴 해석을 위한 CWR 궤도의 모델과 해석 프로그램인 CWRB를 개발하였다. 레일의 해석 모델은 레일요소 당딤을 고려한 14개의 자유도로 나타내었으며, 체결재, 침목, 도상 저항력을 스프링 요소를 사용하였다. 장대레일의 온도하중에 의한 좌굴 온도 및 모드의 분석으로 장대레일의 온도 좌굴 특성을 고찰하였다. For many decades, the railway was constructed using tracks with jointed rails of relatively short lengths in accordance with rolling and handling technology. The joints cause many drawbacks in the track and lead to significant maintenance cost. So, railroad engineers became interested in eliminating joints to increase service loads ana speeds by improving rolling, welding, and fastening technology. Continuous welded rail(CWR) track has many advantages over the conventional jointed-rail track. But, in the case of the elimination of rail joints, it may cause the track to be suddenly buckled laterally by thermal loads. In this paper, CWR track model and CWRB program are developed for linear buckling analysis using finite element method. Rail element with a total of 14 degrees of freedom is used. The stiffness of the fastener, tie, and ballast bed are included by a set of spring elements. The investigation on the buckling modes and temperature of CWR track is presented.
임남형(Nam Hyoung Lim),강영종(Young Jong Kang),유철수(Chul Soo Yu) 한국강구조학회 1996 韓國鋼構造學會誌 Vol.8 No.2
A buckling theory was developed by applying the strain-displacement relations of Kang`s thin-walled curved beam theory to monosymmetric circular arches, a set of stability equations were obtained. An explicit and clear approximation of the curvature effect was made in the derivation process. Closed form solutions were obtained for arches subjected to equal and opposite end moments. An extensive comparative study with other studies provided the validity of the presented theory.
강영종(Kang Young-Jong),임남형(Lim Nam-Hyung),신정렬(Shin Jeong-Ryol),양재성(Yang Jae-Seong) 한국철도학회 1998 한국철도학회 학술발표대회논문집 Vol.- No.-
For many decades, the railway was constructed using tracks with jointed rails of relatively short lengths in accordance with rolling and handling technology. The joints cause many drawbacks in the track and lead to significant maintenance cost. So, railroad engineers became interested in eliminating joints to increase service loads and speeds by improving rolling, welding, and fastening technology. Continuous welded rail(CWR) track has many advantages over the conventional jointed-rail track. But, in the case of the elimination of rail joints, it may cause the track to be suddenly buckled laterally by thermal and vehicle loads. Thermal loads are caused by an increase in the temperature of railway track. In this paper, CWR track model and CWRB program are developed for linear buckling analysis using finite element method(FEM). The finite element discretization is used with a total of 14 degrees of freedom for each rail element. The stiffness of the fastener, tie, and ballast bed are included by a set of spring elements. The investigation on the buckling modes and temperature of CWR track is presented in the paper.
강영종(Young Jong Kang),정주호(Ju Ho Jung),윤기용(Ki Yong Yoon) 한국강구조학회 1996 韓國鋼構造學會誌 Vol.8 No.2
In the present study, a numerical formulation procedure for structural analysis of thin-walled horizontally curved multi-girder bridges is presented. The presented finite element procedure consists of curved and straight beam elements including warping degree of freedom. The curved beam elements is based on the new theory of thin-walled curved beams by Kang and Yoo presented in 1994. The homogeneous solutions of curved beam equations were used for shape functions in the numerical formulation to achieve good convergence. In the straight beam element, the third order hermite polynomials were used for shape functions. Employing the method of static condensation, the presented procedure is designed to treat various types of connections. Also included in the present study is the incorporation of skew boundary conditions which are inevitable in most curved multi-girder Bridges. The developed numerical procedure was then applied to investigate the structural behavior of multi-girder bridges with oaring cross frame spacing, girder spacing, and subtended angle.
강영종(Young-Jong Kang),김정훈(Jung-Hun Kim),신주환(Ju-Hwan Shin),이명섭(Myeong-Sup Lee) 한국철도학회 2011 한국철도학회 학술발표대회논문집 Vol.2011 No.5
High speed railway structure, contact of vehicle needs to design considering the running stability(dynamic behavior). Also, upper structure has to satisfy design standard about moving load, high speed train(KTX). So, the high speed railway structure has to satisfy the requirement of natural frequency, vertical acceleration on deck, face distortion and vertical displacement considering ride comfort, which is suggested Ho-nam high speed railway design standard. In this study, it was investigated and evaluated to the dynamic behavior for tow plate Girder railway bridge subjected to moving load considering real high speed train loads.
강영종(Young Jong Kang),유철수(Chul Soo Yu),정주호(Ju Ho Jung),황민오(Min Oh Hwang) 한국강구조학회 1995 韓國鋼構造學會誌 Vol.7 No.2
Presented in the present study is a curved beam element `including warping degree of freedom, thus having 14 degrees of freedom unlike conventional beam elements having 12 degrees of freedom. The element is based on the new theory of thin-walled curved beam by Kang and Yoo. The homogeneous solutions of curved beam equations were used for shape functions in the numerical formulation to achieve excellent convergence. The strong applicability of the developed curved beam element was shown throughout extensive comparative studies where performance of plate/shell and convention straight beam elements were compared.
강영종(Young Jong Kang),최영준(Young Joon Choi),성익현(Ik Hyun Seong),최진유(Jin Yu Choi) 한국강구조학회 1995 韓國鋼構造學會誌 Vol.7 No.2
The new theory of curved girders has been presented by Kang and Yoo since the conventional Vlasov`s theory was seriously questioned by many investigators. This is to investigate dynamic characteristics of horizontally curved I-girders based on the new theory. Equations motion of curved beams are derived and solved analytically. And as a numerical scheme, a finite element formulation is presented.