• Title, Summary, Keyword: 고속철도교량

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Analysis of CWR track on the High-Speed Railway Bridges considering the Expansion Length of Bridge Deck (고속철도교량의 온도신축길이 변화를 고려한 교량상 장대레일의 거동 해석)

  • Kang Jae-Yoon;Kim Byung-Suk;Kwark Jong-Won;Choi Eun-Suk;Chin Won-Jong
    • Proceedings of the KSR Conference
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    • pp.806-811
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    • 2004
  • Currently, in the design criteria for the high speed railway bridges, the maximum distance between bridge expansion joint is limited to 80m using a continuous welded mil, in order to limit the additional stress in the rail due to the rail-bridge interaction. In the past study on the resonance effect of HSR train, it is known that the reduction of resonance and dynamic responses of bridge deck occurs at the specific expansion length of 28.05m and 46.75m. In this study, the stability of track structure on the HSR bridges with expansion length of 90m has checked by finite element method. And the track behavior including mil stresses and relative displacements are compared to the current state of track structures on the bridge system with 80m long expansion length.

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Vibration Reduction of High-Speed Railway Bridges by Tuned Mass Dampers (TMD를 이용한 고속철도교량의 진동감소에 관한 연구)

  • Oh Jong-Hwan;Kim Yun-Tae
    • Proceedings of the KSR Conference
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    • pp.1261-1267
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    • 2005
  • At this paper Dynamic respones of bridges for the Korean high-speed railway are analyzed by a modal analysis. To control vibration of bridges, Tuned Mass Damper(TMD) that is passive type control device is used. Opimize and prove it. Newmark method is used for a numerical analysis. In case of vehicle is modeled for moving mass that considers the effects of the moving. Also this paper is assumped as the simple supported Bernoulli-Euler beam and considered two dimensional Interaction motion between vehicle and bridge.

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Interoperability of 3D Information Models for HoNam High-speed Railway Infrastructures (호남고속철도 시설물의 3차원 정보모델의 연동성)

  • Kim, Deok-Won;Shim, Chang-Su;Lee, Kwang-Myong;Han, Shoc-Ky;Kim, Yong-Han
    • Proceedings of the KSR Conference
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    • pp.1029-1034
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    • 2009
  • 3자원 정보모델에 기반한 건설프로세서의 혁신이 새로운 추세가 되고 있고 고속철도와 같이 시스템엔지니어링에 해당하는 경우에는 가장 좋은 활용 사례가 될 수 있다. 정보모델은 3차원 영상에 기반하고 다양한 구성요소가 가진 기본정보와 설계와 유지관리에 이르는 생애주기 정보를 저장하고 재활용할 수 있도록 한다. 이 논문에서는 호남고속철도의 한 구간을 대상으로 이미 제안된 철도시설물정보모델의 개념에 근거하여 3차원 정보모델을 구성하였다. 구성된 정보모델에 기반하여 2차원도면, 해석, 견적, 시뮬레이션 등의 각 솔루션으로의 연동성 확보를 위한 시범사업의 결과를 정리하였다. 콘크리트 박스 교량을 대상으로 하는 시범사업을 통해서 생산성 향상 및 3차원 모델의 재활용성을 확보하였다.

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Maximum Moment Calculation in Order to Assure a Mast Foundation Strength in a Test-Bed for the Maximum Speed of 400 km/h (400km/h급 Test-Bed 교량 구간 단독주 기초 강도검토를 위한 최대 모멘트 계산)

  • Lee, Ki-Won;Kwon, Sam-Young;Cho, Yong-Hyeon;Chung, Heung-Chai;Park, Young
    • Proceedings of the KSR Conference
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    • pp.1497-1502
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    • 2011
  • Increasing tensions of contact wire and messenger wire are essential to construct a test-bed for catenary system in the 400km/h speed on Honam high-speed railway. Because heavy load is applied to a mast due to the increased the tensions of both wires it is required to investigate the strength of the foundation. Therefore, in this study the maximum moment of an electric pole under the worst condition was calculated to investigate the strength of the pole foundation on the bridges. The maximum moment database table used in the construction of Kyungbu high-speed railway was referenced to derive the worst conditions and to review the composition of catenary system in the test-bed section. From the results of this study regarding assumptions and calculation process it will be possible to estimate the optimized strength of the pole foundations on the bridges which will be constructed in the future.

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Analysis of Dynamic Behavior of Open-Steel-Plate-Girder Bridges Due to Installing Rubber Pads (철도교용 고무패드 설치에 따른 판형교의 동적 거동 분석)

  • Choi, Eun Soo;Kim, Hyun Min;Oh, Ji Taek;Kim, Sun Gil
    • Journal of Korean Society of Steel Construction
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    • v.17 no.3
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    • pp.295-306
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    • 2005
  • In this study, the dynamic characteristics of the two open-steel-plate-girder bridges was analyzed using the pads' stiffness estimated in the previous accompanying paper.Also, it was determined that the variation in the dynamic behavior of the two bridges due to the pads corresponds to the codes describing the restriction for the steel bridges' behavior.The pads installed at the bridges increase the displacement at mid-span.However, the increase does not exceed code restrictions and does not have an adverse effect on the riding quality of the running trains. The natural and Chloroprene rubber pads are not suitable for bridge bearings since they are more deformed than the code regulated ones.

Comparative Analysis of Track-Bridge Interaction of Sliding Slab Track and Rail Expansion Joint for Long-Span Railway Bridge (장경간 철도 교량에 적용된 슬라이딩 궤도와 레일신축이음장치의 궤도-교량 상호작용 비교)

  • Lee, Kyoung Chan;Jang, Seung Yup;Lee, Jungwhee;Choi, Hyun Sung
    • Journal of the Computational Structural Engineering Institute of Korea
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    • v.29 no.2
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    • pp.169-177
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    • 2016
  • Sliding slab track system, which consists of low friction sliding layer between track slab and bridge deck, is recently devised to reduce track-bridge interaction effect of continuously welded rail(CWR) without applying special devices such as rail expansion joint(REJ). In this study, a series of track-bridge interaction analyses of a long-span bridge with sliding slab track and REJ are performed respectively and the results are compared. The bridge model includes PSC box girder bridge with 9 continuous spans, and steel-concrete composite girder bridge with 2 continuous spans. The total length of the bridge model is 1,205m, and the maximum spacing between the two fixed supports is 825m. Analyses results showed that the sliding slab track system is highly effective on interaction reduction since lower rail additional axial stress is resulted than REJ application. Additionally, horizontal reaction forces in fixed supports were also reduced compared to the results of REJ application. However, higher slab axial forces were developed in the sliding slab track due to the temperature load. Therefore, track slab section of the sliding slab track system should be carefully designed against slab axial forces.

Analysis of Flood Inundation using FLUMEN Model (FLUMEN 홍수범람 해석)

  • Bok, Jung-Soo;Jung, Kwan-Sue;Jang, Chang-Lae
    • Proceedings of the Korea Water Resources Association Conference
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    • pp.1614-1618
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    • 2008
  • 일반적으로 우리나라 수해는 미개수 하천 지역의 외수침수와 더불어 홍수유출 단면 부족 및 내수배제 불량 등이 주요 원인이지만 하천 내 주요 수공구조물인 교량이나 보 등에 의한 홍수위 상승으로 발생한다. 특히, 교량은 도로의 교통기능에 중점을 둔 설계와 시공으로 수리학적으로 매우 불리한 위치에 건설되기도 하며 기존 교량폭의 확장이나 인접한 위치에 다른 교량들을 추가로 건설하여 하천의 한정된 통수단면적이 점차적으로 감소하는 등 하천관리에 많은 어려움이 가중되고 있다. 따라서 본 연구에서는 FLUMEN 모형을 이용하여 교량이 홍수위 상승 및 홍수범람에 미치는 영향과 이에 따른 제외지 침수면적의 변화를 파악하였다. 감천과 직지사천이 합류되는 구간을 대상으로 지형자료는 총 7곳의 교량을 고려하여 구축한 후 교량 유 무에 따른 조건별 부정류 모의를 실시하였다. 모형의 적용 결과 교량 건설에 따른 하폭 감소율은 김천철교 지점에서 10.92%로 가장 컸으며, 수위는 김천대교 지점에서 0.15m로 가장 크게 상승하였다. 또한 경부고속국도 주변의 수위는 경부고속철도 교량의 신설로 인해 140%까지 증가하는 것으로 나타났다. 홍수범람 모의 결과 교량 건설 전과 후에 제방 월류에 의한 침수가 발생하였고 교량 건설 후 범람면적과 침수심이 증가하였으며, 홍수범람의 주원인은 하천의 통수단면적이 작기 때문으로 나타났다.

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Traffic Safety & Passenger Comforts of a Suspension Bridge Considering Seismic Loads (고속열차 주행 시 지진하중을 고려한 현수교의 주행안전성 및 승차감 분석)

  • Kim, Sung-Il;Kim, Dong-Seok
    • Journal of the Korean Society for Railway
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    • v.14 no.1
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    • pp.57-65
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    • 2011
  • The estimation of traffic safety and passenger comfort when the train is running on the bridge is a estimation unique to the railway bridge. The standards for such estimation are included in the Eurocode, the Shinkansen design criteria, and the design guideline of the Honam High-speed railway. The items are bridge responses including vertical displacement of bridge, vertical acceleration, and slab twist. In principle, a direct estimation based on the train responses has to take place. However, the estimation based on the bridge responses can be seen as an indirect estimation procedure for the convenience of the bridge designer. First, it is general practice that traffic safety can be verified as a derailment coefficient or wheel load decrement The general method of estimating passenger comfort is to calculate the acceleration within the train car-body. Various international indexes have been presented for this method. In the present study, traffic safety and passenger comforts are estimated directly by bridge/train interaction analysis. The acceleration and wheel load decrement are obtained for the estimation of traffic safety and passenger comforts of a suspension bridge which has main span length of 300m. Also, the consideration of seismic load with simultaneous action of moving train is done for bridge/train/earthquake interaction analysis.

Dynamic Serviceability Estimation of the Simple Railway Bridge with PSC I Girder (PSC I형 단순 철도교량의 동적사용성 평가)

  • Kang, Sung-Hoo;Choi, Tae-Geun;Park, Sun-Joon;Kim, Sung-Il
    • Journal of Korean Society of Hazard Mitigation
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    • v.9 no.1
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    • pp.65-71
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    • 2009
  • In this study, dynamic serviceability of PSC, PreStressed Concrete, simple railway bridge with 25m span was estimated. All of the high speed and general train loads were considered at estimation. Natural frequency is estimated about 8Hz and includes within optimum natural frequency extent of the railway bridge. Also, the bridge was detected that resonance occurrence possibility does not exist. When travel the Moogunghwa train, acceleration response was measured to 0.43g that exceed limitation value 0.35g. Also, rotation angle of girders end did not satisfy design standard of railway bridge for high speed train, but impact coefficient and deflection satisfied design standard. As a result, that railway bridge was detected that is securing dynamic safety and serviceability partially, but methods to decrease vibration acceleration response are required.