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생애주기분석을 위한 궤도 마모 및 틀림 데이터 처리 및 분석
공정식(Jung Sik Kong),정민철(Min Chul Jeong),김정훈(Jung Hoon Kim),김건우(Gun Woo Kim) 한국철도학회 2011 한국철도학회 학술발표대회논문집 Vol.2011 No.10
Generally there are many types of data such as wear data or irregularity data are detected for analyzing railway performance. The analysis of railroad wear or irregularity data is most effective method for the efficient railway maintenance. Especially the track damaged directly by train have as important position with the inspection data. This study suggest the Life-Cycle performance analysis method and process of railroad by analyzing two types of data wear data and irregularity data. This analysis methods can be applied to suggest the Life-Cycle performance of railroad based on environmental factors or design factors such as sleeper type roadbed type cant the radius of curvature speed maintenance history and so on.
공정식(Jung Sik Kong),정민철(Min Chul Jeong),김정훈(Jung Hoon Kim),이원우(Won Woo Lee) 한국철도학회 2011 한국철도학회 학술발표대회논문집 Vol.2011 No.5
Generally, the analysis of railroad wear data is most effective method for the efficient railway maintenance. The wear of railway track affects loss of rough ride, noise or vibration of train and traveling safety. Moreover as the track is worn away, this promotes destruction of structural mechanism of rail track which can bring about increasing of rail track maintenance cost drastically. For this reason, it is very important and interested research subject to design railway track structure and to analyse train movement mechanism based on systematic analysis of the reasons causing rail wear possible in real field. In this research, for the efficient maintenance, Life Cycle Performance of rail track and maintenance characteristics are computed considering some track components such as track type, contracting type, sleeper type and roadbed type. Time ? Wear probabilistic distribution relationship as well as multiple regression analysis based on time, curvature and wear data are computed to predict the service life remainder of railway track and to be adapted to safety assessment.
CFTA거더의 선형거동 분석 및 동적해석을 통한 안전성 평가
정민철 ( Jeong Min-chul ),이선애 ( Yi Sun-ae ),( Thin Thai Trung ),공정식 ( Kong Jung-sik ) 한국구조물진단유지관리공학회 2009 한국구조물진단유지관리공학회 학술발표대회 논문집 Vol.13 No.1
Recently, many researchers about efficient composite section by steel and concrete are performed. The new type of girder, CFTA(Concrete Filled and Tied Steel Tubular Arch), is about increasing aesthetic, economic efficiency, using strong, ductile, energy absorbing CFT(Concrete Filled Steel Tubular) structural form with arch and external prestressing. Linear behavior and dynamic behavior of CFTA girder was analyzed for stability assessment. Structure modeling, linear elastic and collision was performed by ABAQUS/CAE. The external prestressing gave compressed force to the girder, resulting increased tensional destruction resistance and sufficient safety margin at dynamic behavior and collision.