• 한국철도학회:학술대회논문집
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• 한국철도학회 2007년도 추계학술대회 논문집
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• pp.1058-1070
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• 2007

Internal and external railway management corporations are using the periodic replacement criteria of rail by accumulated passing tonnage and wear to maintain rails for servicing. However, internal the periodic replacement criteria of continuous welded rail(CWR) by accumulated passing tonnage is the one(50kg/m-5 million gross tonnage, 60kg/m-6 million gross tonnage) presented in Japan before. It was estimated with the fatigue life about 50kg N rail joints applied diesel train load but it wasn't applied to current conditions of track; elimination of rail joint, using the concrete slab track and operation of light train load and effect of welding, manufacturing technique, grinding of rail. Therefore, in this study, it was investigated the types of damage and cause in welded rails and examined standards and information resources. Also, this study presents preliminary data to revise the periodic replacement criteria of CWR by current accumulated passing tonnage in bending test of laid welded rail and a survey of track maintenance history of Seoul metro.

• 한국철도학회:학술대회논문집
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• 한국철도학회 2007년도 추계학술대회 논문집
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• pp.123-128
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• 2007

To predict the fire and smoke hazards of rail car with a evacuation model is essential for achieving life safety of all passengers in the event of fire. Currently, more than 30 different evacuation models are available and expected increasing demand in high population density areas as a metro train station. This paper includes brief history of evacuation models and review some key factors of design egress scenario, these are pre-movement time, egress route, location of fire, overturned carriage, and configuration of rail car. Applying the egress model for rail passenger car, users need to confirm the model's ability of physiological, psychological responses effecting to pre-movement time of individual or crowd unit, representation of complexity of carriage layout, and evaluation of effects of smoke.

• Current Research on Agriculture and Life Sciences
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• 제31권4호
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• pp.256-264
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• 2013

본 논문은 경전철 건설로 인한 도심의 경관훼손 저감 및 쾌적한 가로경관을 위한 교량하부녹화방안을 제시하고자 연구를 수행하였다. 연구의 대상지는 대구광역시 도시철도 3호선이 건설되는 구간이며, 고층아파트 및 상업시설이 밀집된 지역을 사례지로선정하였다. 교량하부 녹화방식을 유형화한 뒤, 유형별 선호도의 차이와 시각적 이미지를 평가하고자 3차원 시뮬레이션을 사용하여 각 장면을 제작하였으며, 경관형용사를 이용하여 설문평가를 실시하였다. 분석결과, 화목열식유형의 선호도가 가장 높게 평가되었으며, 교량경관에 대한 선호도에 가장 큰 영향을 미치는 요인은 조화성인 것으로 나타났다. 이는 교량하부의 효율적인 녹화계획을 위한 기반을 마련하는데 중요한 기초자료가 될 것으로 판단된다.

• 한국철도학회논문집
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• 제15권1호
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• pp.80-87
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• 2012

본 연구에서는 인천 1호선 구간을 대상으로 2009년 집계된 스마트카드 데이터를 활용해 승객좌석점유(혼잡도)와 정시성 지표를 사용하여 도시철도 서비스를 평가하였다. 차량단위의 대중교통 서비스 평가를 위해 개별 이용객의 스마트카드 데이터를 스케줄에 의해 운행되는 차량단위로 집합화하였다. 분석결과 인천 1호선 하행선(계양${\rightarrow}$국제업무지구)의 오전 첨두 시간대(7시-9시)의 차내 혼잡과 차량의 정시도착 측면에서 낮은 서비스 수준을 보이는 것으로 분석되었다. 차내 혼잡도와 정시성 간에는 밀접한 연관성이 있으며 이는 이전 역에서의 높은 승객수요가 지속적인 열차의 연착을 발생시키는 것으로 분석되었다.

• 한국철도학회:학술대회논문집
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• 한국철도학회 2006년도 추계학술대회 논문집
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• pp.755-770
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• 2006

1974. 8.15 SeoulMetro, beginning with the first electric railway established at six cities, so it is managing mass transportation of traffic. Especially, in case of seoul, It is managing that from one to eight lines, 286.9km, 265 stations have installed and now it is carrying about 5.5million of passengers everyday, and 2,000million passengers a year. So accident is increasing from the station every year. For this measure, SeoulMetro prepares safety fence for passengers crash but, as suicides or people who watch the accident took place, for at the bottom of passengers crash protection, PSD installing is needed. Even though, PSD is managing ATO section but, in controlling SeoulMetro, one to four lines sections are (ATS, ATC)section. Between as ATS, ATC section, ATO section, subway gate and PSD must have opened and crossed always at the time. And the interlock control corrosion protection gate, managing skills with installation, method, using in history, apply to 10rail cars one train sets, and maximum applying 224% sections of passengers congested that consideration is to be needed. So 2004, SeoulMetro improved technology and basic design of PSD at ATS section. Based on this, from 2005.4 to 2006.6, using subway 2lines per 12stations set the model installation(full type 11stations, half type 1station) After installing in case of success, it is going about to suggest that effective analysis and hereafter subject.

• 한국철도학회:학술대회논문집
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• 한국철도학회 2011년도 정기총회 및 추계학술대회 논문집
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• pp.1373-1380
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• 2011

Seoul Metro has been continuously growing after its foundation on August 15, 1974 and is currently acting the leading role in the city transportation which is now used by 4,130 thousand people (as of early 2011) on a daily average. The number of the electric rail cars also increased significantly from 60 cars at the time of foundation to 1,954. And the types of the cars also started and operated with the rheostatic control cars in the 70s to the chopper control cars in the 80s and VVVF control cars in the 90s. But the control devices of the driver's cabs haven't been accustomed to the drivers because of it's diversity. Therefore, This study carried out the survey for the preferences of control devices from the incumbent drivers at Seoul Metro. And we analyzed it and suggest a method for standardization of it's locating and naming the major control devices in the driver's cab as the consideration of their preference for it's efficiency, safety, and convenience.

• Structural Engineering and Mechanics
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• 제68권1호
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• pp.67-80
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• 2018

Recently, U-section decks have been more and more used in metro and light rail bridges as an innovative concept in bridge deck design and a successful alternative to conventional box girders because of their potential advantages. U-section may be viewed as a single vent box girder eliminating the top slab connecting the webs, with the moving vehicles travelling on the lower deck. U-section bridges thus solve many problems like limited vertical clearance underneath the bridge lowest point, besides providing built-in noise barriers. Beam theory in mechanics assumes that plane section remains plane after bending, but it was found that shearing forces produce shear deformations and the plane section does not remain plane. This phenomenon leads to distortion of the cross section. For a box or a U section, this distortion makes the central part of the slab lagging behind those parts closer to the webs and this is known as shear lag effect. A sample real-world double-track U-section metro bridge is modelled in this paper using a commercial finite element analysis program and is analysed under various loading conditions and for different geometric variations. The three-dimensional finite element analysis is used to demonstrate variations in the transverse bending moments in the deck as well as variations in the longitudinal normal stresses induced in the cross section along the U-girder's span thus capturing warping and shear lag effects which are then compared to the stresses calculated using conventional beam theory. This comparison is performed not only to locate the distortion, warping and shear lag effects typically induced in U-section bridges but also to assess the main parameters influencing them the most.

• 한국ITS학회 논문지
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• 제21권3호
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• pp.1-17
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• 2022

수도권 도시철도 혼잡으로 인해 다양한 문제가 발생되고 있어 도시철도 혼잡을 정확히 분석하는 연구 또한 해결방안 중 하나일 것이다. 현재 계수법, 중량검지법, CCTV, 모바일 Wi-Fi 등을 활용한 혼잡도 분석방법론은 결과의 정확성이 낮거나 단일 노선 및 열차에만 국한되는 한계점이 존재한다. 본 연구에서는 도시철도 승객의 다중경로 이용행태와 수도권 도시철도 열차운행계획을 반영한 열차 혼잡도 분석모형을 제시하였다. 특히 열차 용량 초과시 승객이 대기한 후 다음 열차에 탑승하는 통행패턴을 고려하여 열차 혼잡도 산정의 정확성을 제고하였다. 열차 혼잡도는 10분 단위로 갱신되어 시민에게 혼잡정보 제공이 가능하므로 사회적 편익증대에 기여할 것으로 기대된다.

• 한국철도학회:학술대회논문집
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• 한국철도학회 2011년도 정기총회 및 추계학술대회 논문집
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• pp.2082-2089
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• 2011

This study is examination of application on site for performance and stability of real-time broken rail detection equipment development system about connection, welded part occurring data errors of broken rail monitoring system. As a result of analysis about data collected in Seoul Metro No.2 Subway from Mar. 2010 to Jan. 2011, we found it is possible to detect crack location(Thermit welding) within the margin of error of ${\pm}1m$ accurately as the first attenuation was -1.2dB and the second was -1.3dB.

• 한국철도학회:학술대회논문집
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• 한국철도학회 2011년도 정기총회 및 추계학술대회 논문집
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• pp.517-544
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• 2011

Promote competition in local government and the construction of a subway construction in the vicious cycle of debt due to the operating deficit as a greater burden on local finances was leave. This government policy of public transport in the center of the metro construction costs affordable and to respond appropriately to public transport demand new transit LRT(Light rail Transit) by introducing the current Busan was the opening of Line 4, yongin line, Busan - Gimhae line, parliamentary and barge construction or ready for the opening. What is light rail, compared to the existing subway and cheaper construction cost, the existing road or bridge that runs along the track is installed, etc. Manless system construction cost and operating expenses as a possible new railway transportation has been a leading state-of-the-art mad. However, the domestic business system engineering of light rail-related companies in the developed countries are doing to advance to the national to the local engineering skills of the self-free, hurry will have to be secured. Therefore, this paper applies local light rail project on the status of the systems engineering analysis and based on this source of the latest engineering technology-intensive systems engineering to provide direction to the development of technology.