본 논문의 목적은 콘크리트(STEDEF)궤도에서의 요철에 따른 적정연마량과 레일피로수명을 산정하는 것이다. 이를 위해 현장측정을 통하여 레일표면요철성장율을 분석하였고 실제 현장에서 발췌한 사용레일을 실내시험을 통하여 레일심부대비 경도값에 따른 필요연마량을 분석하였다. 연구 결과, 현장측정을 통한 레일표면요철성장율은 5천만톤당 0.05...
제 목 : 콘크리트궤도(STEDEF)에서의 레일연마를 고려한 레일피로수명 평가
본 논문의 목적은 콘크리트(STEDEF)궤도에서의 요철에 따른 적정연마량과 레일피로수명을 산정하는 것이다. 이를 위해 현장측정을 통하여 레일표면요철성장율을 분석하였고 실제 현장에서 발췌한 사용레일을 실내시험을 통하여 레일심부대비 경도값에 따른 필요연마량을 분석하였다. 연구 결과, 현장측정을 통한 레일표면요철성장율은 5천만톤당 0.05mm, 1억톤당 0.10mm로 분석되었고, 실내시험을 통한 레일심부대비 경도값 측정결과 5천만톤당 0.08mm, 1억톤당 0.16mm로 분석되었다. . 현장측정을 통한 레일표면 요철성장률 분석결과와 심부대비경도 실내시험으로부터 레일의 연마주기를 5천만톤당 0.1mm, 1억톤당 0.20mm로 도출하였다. 기 연구된 내용으로부터 콘크리트(STEDEF)궤도구조에서 사용하는 60kg/m 레일의 피로수명은 7.8억톤으로 제시되었다. 이에 본 연구로 도출된 레일연마를 적용하여 레일연마를 고려한 레일의 피로수명을 5천만톤당 1회 연마시(0.1mm) 13.1억톤, 1억톤당 1회 연마시(0.2mm) 11.8억톤으로 도출하였다.
제 목 : 콘크리트궤도(STEDEF)에서의 레일연마를 고려한 레일피로수명 평가
본 논문의 목적은 콘크리트(STEDEF)궤도에서의 요철에 따른 적정연마량과 레일피로수명을 산정하는 것이다. 이를 위해 현장측정을 통하여 레일표면요철성장율을 분석하였고 실제 현장에서 발췌한 사용레일을 실내시험을 통하여 레일심부대비 경도값에 따른 필요연마량을 분석하였다. 연구 결과, 현장측정을 통한 레일표면요철성장율은 5천만톤당 0.05mm, 1억톤당 0.10mm로 분석되었고, 실내시험을 통한 레일심부대비 경도값 측정결과 5천만톤당 0.08mm, 1억톤당 0.16mm로 분석되었다. . 현장측정을 통한 레일표면 요철성장률 분석결과와 심부대비경도 실내시험으로부터 레일의 연마주기를 5천만톤당 0.1mm, 1억톤당 0.20mm로 도출하였다. 기 연구된 내용으로부터 콘크리트(STEDEF)궤도구조에서 사용하는 60kg/m 레일의 피로수명은 7.8억톤으로 제시되었다. 이에 본 연구로 도출된 레일연마를 적용하여 레일연마를 고려한 레일의 피로수명을 5천만톤당 1회 연마시(0.1mm) 13.1억톤, 1억톤당 1회 연마시(0.2mm) 11.8억톤으로 도출하였다.
The Fatigue Life Evaluation of Rail on Concrete Track with Rail Grinding
Choi, Cheol Su (Supervisor Park, Yong-Gul, & Kang, Yun-Suk) Dept. of Railway Construction Engineering Graduate School of Railroad Seoul National University of Science and Technolo...
Abstract
The Fatigue Life Evaluation of Rail on Concrete Track with Rail Grinding
Choi, Cheol Su (Supervisor Park, Yong-Gul, & Kang, Yun-Suk) Dept. of Railway Construction Engineering Graduate School of Railroad Seoul National University of Science and Technology
The purpose of this paper is to estimate the proper rail grinding amount and rail fatigue life according to the rail surface irregularities in the concrete (STEDEF) track. For this purpose, the growth rate of the rail surface irregularities was analyzed through field measurements and the necessary amount of rail grinding according to the hardness value of the rail core was analyzed through laboratory tests on the used rail extracted from the actual field. As a result of the study, the growth rate of rail surface irregularities was analyzed to be 0.05mm per 50 million tons, 0.10mm per 100 million tons by field measurement, and the hardness value of the rail core measured by the laboratory was analyzed to be 0.08mm per 50 million tons, 0.16mm per 100 million tons. From the results of analysis of irregularities growth of the rail surface by field measurement and the hardness value of the rail core by laboratory tests, the grinding cycle of the rail was derived as 0.1mm per 50million tons and 0.20mm per 100million tons. The fatigue life of the 60kg/m rail used in the concrete(STEDEF) track was suggested to be 780 million tons from exiting research. Therefore, the fatigue life of rails was estimated to be 1.31 billion tons when it was grinded once(0.1 mm) per 50 million tons and 1.18 billion tons when grinded once(0.2mm) per 100 million tons, considering the rail grinding standards derived from this study.
Abstract
The Fatigue Life Evaluation of Rail on Concrete Track with Rail Grinding
Choi, Cheol Su (Supervisor Park, Yong-Gul, & Kang, Yun-Suk) Dept. of Railway Construction Engineering Graduate School of Railroad Seoul National University of Science and Technology
The purpose of this paper is to estimate the proper rail grinding amount and rail fatigue life according to the rail surface irregularities in the concrete (STEDEF) track. For this purpose, the growth rate of the rail surface irregularities was analyzed through field measurements and the necessary amount of rail grinding according to the hardness value of the rail core was analyzed through laboratory tests on the used rail extracted from the actual field. As a result of the study, the growth rate of rail surface irregularities was analyzed to be 0.05mm per 50 million tons, 0.10mm per 100 million tons by field measurement, and the hardness value of the rail core measured by the laboratory was analyzed to be 0.08mm per 50 million tons, 0.16mm per 100 million tons. From the results of analysis of irregularities growth of the rail surface by field measurement and the hardness value of the rail core by laboratory tests, the grinding cycle of the rail was derived as 0.1mm per 50million tons and 0.20mm per 100million tons. The fatigue life of the 60kg/m rail used in the concrete(STEDEF) track was suggested to be 780 million tons from exiting research. Therefore, the fatigue life of rails was estimated to be 1.31 billion tons when it was grinded once(0.1 mm) per 50 million tons and 1.18 billion tons when grinded once(0.2mm) per 100 million tons, considering the rail grinding standards derived from this study.
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