• International Journal of Railway
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• 제5권4호
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• pp.175-181
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• 2012

This study proposes a model for railway safety assessment with which the safety of whole railway system can be evaluated. The purpose of the assessment model is to generate safety indicators which quantitatively represent the degree of railway safety. Safety indicators were proposed as three indicators according to their functions; accident indicators, safety management indicators, and safety culture indicators. This paper describes the first result on the safety target which will be a key starting point toward the development of safety assessment model. It is recommended that the safety target to be composed of several sub-targets are apportioned to constituent components. It is concluded that the classification of safety target has influence on deciding components or attributes that constitute each sub-indicators; accident indicators, safety management indicators, and safety culture indicators. Based on this study, a railway safety assessment model will be developed in the following study.

• 한국철도학회논문집
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• 제12권4호
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• pp.443-449
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• 2009

국가에서는 철도운영 및 시설기관에 산재되어 있는 철도안전정보를 수집하여 분석할 수 있는 철도안전정보 종합관리시스템을 구축하야 철도안전관리를 효율적으로 수행하기 위하여 노력하고 있다. 매년 철도안전도를 평가하기 위하여 철도사고 자료를 분석하여 사망자 및 부상자 수를 산출하고 있으며 사고 원인 및 위험발생 경위를 규명하여 사고를 최소화 할 수 있도록 여러 안잔정책 및 안전관리방안을 시행하고 있다. 따라서 보다 선진적인 안전정책 수립 및 안전관리를 위해 철도안전도를 입체적으로 그리고 정량적으로 표현할 수 있는 방안이 필요하며 이를 위해서는 안전에 대한 주요 영향요소가 무엇인지를 파악해야 하며 선정된 개발적 요소들에 대한 정량적 철도안전지수(Railway Safety Index)를 개발해야 한다. 본 연구에서는 철도안전도를 정량적으로 평가할 수 있는 안전도 평가지표를 개발하여 안전목표 수립 및 관리 등 철도안전향상를 위한 전략적 방향 및 정책수립 과정에서 활용할 수 있는 모델을 제공하고자 한다.

• 한국철도학회:학술대회논문집
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• 한국철도학회 2007년도 추계학술대회 논문집
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• pp.1657-1667
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• 2007

This study propose a model for railway safety evaluation with which the safety of whole railway system can be evaluated. The evaluation model is to generate a safety index which quantitatively represent the degree of railway safety. Safety index is proposed a function of three indexes; an accident index, safety management index, and safety culture index. This paper describes the first result from the study on the safety target which will be a key starting point toward the development of safety evaluation model. It is recommended that the safety target be composed of several sub-targets that are apportioned to constituent components. It is concluded that the classification of safety target influence on deciding components or attributes that constitute each sub-indexes; an accident index, safety management index, and safety culture index. Based on this study, a railway safety evaluation model will be developed in the next study.

• 한국철도학회:학술대회논문집
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• 한국철도학회 2004년도 추계학술대회 논문집
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• pp.916-921
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• 2004

At present, the highest operation speed of general domestic train is in the level of 140km/h and it is being improved to reach at the level of 200km/h in 2011. The improved environment of train operation speed which inevitably occurs owing to the operation of KTX on the existing line badly requires technology development such as testing and evaluating technology of factors hindering high speed of railway infrastructure including railway bridge, technology to ensure operation safety and technology to evaluate structure stability. Comparing dynamic numerical interpretation for railway truss bridge and load of design standard by using dynamic response measurement and analysis for the railway truss bridge currently in use, this study established the improvement program to ensure the lateral dynamic safety of truss bridge with the increased speed of train.

• 한국화재소방학회논문지
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• 제34권4호
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• pp.59-68
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• 2020

본 연구에서는 축소모형을 이용한 철도터널의 화재안전성 평가 실험시 필요한 축소모형 철도차량의 화재에 대한 설계를 수행하였다. 기존의 철도터널 축소모형 실험시 활용된 방법의 단점을 극복하기 위하여 화재부력을 위하여서는 메탄올 화원을 이용하였으며, 연기 가시화를 위하여서는 스모크카트리지를 활용하여 철도차량 화재를 모사하였다. 지하철 철도차량의 열방출률의 모사를 위하여 다양한 메탄올 연료 팬에 대하여 콘칼로리미터(ISO 5660) 및 저울을 이용하여 열방출률을 측정하였다. 설계된 축소모형 철도차량 화원을 이용하여 축소모형 철도터널에서의 임계속도를 측정하였다. 화재 임계속도는 축소모형 터널 상부에서의 온도 및 레이져를 이용한 가시화 측정결과 등을 종합적으로 검토하여 선정하였다.

• International Journal of Railway
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• 제3권1호
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• pp.34-37
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• 2010

In recent, the railway system consists of subsystems as rolling stock and infrastructures as signaling, telecommunication, power supply, overhead contact and platform screen door, etc. Furthermore, each subsystem has complicated interface so as not to understand these relationship. Consequently, to operate the railway system continuously with required safety and availability, the failure data should be corrected and analyzed systematically during operation. To achieve this object effectively, this paper presents the method which is evaluating the operational risk quantitatively using failure data, and selecting the critical equipment. Following this analysis, the improvement plan is established and applied to reduce the operational risk on system or equipment. From this study, the critical equipments of system could be determined and prioritized by risk analysis. Also, the effective maintenance to prevent critical failure could be implanted by this suggested methodology.

• 한국안전학회지
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• 제16권2호
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• pp.130-135
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• 2001

고속 전철 특징 중의 하나인 장대 레일의 사용으로 인하여 발생하는 추가 응력과 변위에 대하여 대만 고속전철 교량에 대해서 검토한다. 또한 대만 고속 전철 교량 시방 규정의 중요한 특징인 사용지진을 레일-구조물 해석에 고려하도록 하는 규정을 적용 후 단순교의 응력 및 상대변위를 검토한다. 지진 시 지반 운동을 고려하며, 단순교의 지진 응답을 변위로 레일-구조물 상호 작용 해석에 적용시킨다. 지진하중 고려 유무에 따른 단순교의 응력 및 상대 변위를 검토한다.

• 한국철도학회:학술대회논문집
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• 한국철도학회 2003년도 춘계학술대회 논문집
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• pp.768-773
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• 2003

The inspection of track irregularity, which is the most important index for the evaluation of the dynamic safety of the rolling stock, is performed by setting up the testing train set. The self-diagnosis for the various rolling stocks and railways can be obtained if it is possible to take the simultaneous inspection of track irregularity for the commercial vehicle while it is running and to build up a dynamic safety evaluation system. It is expected to have some good effects, such as preventing accident with the low dynamic safety, cutting cost for the testing train set and evaluating the exact influence on the rolling stock and railway. In this study, innertial measuring method, which allows us to directly measure the track irregularity from the commercial vehicle, will be considered and some overseas cases will be explored as well.

• Geomechanics and Engineering
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• 제29권3호
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• pp.369-376
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• 2022

Accurately evaluating and predicting the performance of facilities is a key task in establishing a maintenance strategy for facilities. The importance of performance evaluation is becoming more pronounced, especially when the aging of facilities requires a huge budget. In this study, performance assessment models were developed for road and railway tunnels. Delphi analysis was performed to identify sub-elements necessary to evaluate the performance of a tunnel. The relative importance of the evaluation factors was derived from the AHP analysis. The correlation analysis was performed between each assessment factor and the final result to verify the significance of the model. For the correlation analysis, the survey data measured through precision safety diagnosis in tunnels in use was applied. The cost effectiveness analysis was also conducted according to the scenarios with different composition of performance factors in order to improve the practical applicability of the evaluation model developed in this study.

• 한국철도학회논문집
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• 제9권1호
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• pp.12-17
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• 2006

The bridge to be analyzed is a self-anchored suspension bridge which is constructed within the country. Forced vibration test was performed with oscillator for verification of safety, maintenance and management. In this study, the feasibility of deduction was verified with the modified analysis model by comparing natural frequency, natural mode and damping ratio of the real bridge, which are obtained from the vibration test of the whole bridge after construction of 3-dimensional self-anchored cable suspension bridge, with the eigenvalue of analytic computation model and evaluating them. As a result of study, the friction of bridge bearing must be considered to get the natural frequencies of flexural vibration, and evaluating the polar moment of inertia is critical factor in analysis modeling in case of torsional vibration. The logarithmic damping ratio of the test appeared to exceed the ordinary one assumed at the design phase.