PSC-box 철도교량의 KTX 및 EMU 고속열차에 대한 동적 응답 특성 분석
Analysis of Dynamic Response Characteristics for KTX and EMU High-Speed Trains on PSC-Box Railway Bridges
0
조회
0
다운로드
1
인용
0
참고문헌
키워드
초록
국내 경부선 및 호남선의 고속철도교량은 대부분 PSC-box 형식으로 설계되어 있고, 경간장35~40m인 경우 약 4~5Hz 정도의 1차휨 고유진동수를 가지고 있다. 이때 KTX 고속열차가 290~310km/h 속도로 주행할 경우, 열차에 의한 가진 진동수가 교량의 1차 휨 고유진동수에 근접하면서 공진 유사 현상이 발생하게 된다. KTX와 함께 향후 운행예정인 EMU-320 고속열차의 증속에 대해서도 철도교량의 동적 응답을 통한 안전성 분석이 필요한 상황이다. 본 연구에서는 실제 철도교량에서 계측된 응답을 기반으로 구조해석모델 개선 기법을 통해 대상 철도교량과 거동이 유사한 해석모델을 구현하였다. 개선된 구조해석모델은 고속철도교량에 KTX가 주행할 때 계측된 응답과 비교하여 검증하고, 이를 통해 KTX와 EMU-320 고속열차가 증속할 경우 동적 응답 특성을 분석하였다. 또한, 결과적으로, 교량 중앙부의 최대 수직변위와 가속도의 변화는 철도설계기준과 비교하여 주행 안전성을 평가하였다.
Abstract
The majority of high-speed railway bridges along the domestic Gyeongbu and Honam lines feature a PSC-box type structure with a span length ranging from 35 to 40m, which typically exhibits a first bending natural frequency of approximately 4 to 5Hz. When KTX high-speed trains transverse these bridges at speeds ranging from 290 to 310km/h, the vibration induced by the trains approaches the first bending natural frequency of the bridge. Furthermore, with the upcoming operation of a EMU-320 high-speed train and the anticipated increase in the speeds of these high-speed trains, there is a need to analyze the dynamic response of high-speed railway bridges. For this, based on measured responses from actual railway bridges, a numerical model was constructed using a numerical model updating technique. The dynamic response of the updated numerical model exhibited a strong agreement with the measured response from the actual railway bridges. Subsequently, this updated model was utilized to analyze the dynamic response characteristics of the bridges when KTX and EMU-320 trains operate at increased speeds. The maximum vertical displacement and acceleration at the mid-span of the bridges were also compared to those specified in the railway design standard with the increasing speed of KTX and EMU-320.
참고문헌 (18)
- Gou, H., "In-situ testing and model updating of a long-span cable-stayed railway bridge with hybrid girders subjected to a running train", Engineering Structures, 253 (2022)
- Holland, J. H., "Adaptation in Natural and Artificial Systems" (1975), University of Michigan Press
- Jeong, Y. D., "Analytical Research on Dynamic Behavior of Steel Composite Lower Railway Bridge", Journal of the Korea Institute for Structural Maintenance and Inspection, 23(1), pp.27~35 (2019), KSMI
- Jeong, S., "Field Measurement of Dynamic Properties of Honam High-Speed Railway Bridges", Journal of the Korean Society for Railway, 24(5), pp.386~394 (2021)
- Jeong, S., "Dynamic amplification assessment of high-speed railway bridge under resonance condition using multi-sensor fusion", International Journal of Rail Transportation, 10(4), pp.456~475 (2022)
- Kim, J. C., "Development of a mutation operator of a real-coded genetic algorithm for model updating of existing bridge", Ph.D, Department of Civil Engineering, pp.2016
- Kim, S. I., "Field Tests and Resonance Behavior Corresponding to the Damping Ratio of a High Speed Railroad Bridge", Journal of the Korean Society for Railway, 16(4), pp.305~310 (2013)
- Ministry of Land, Infrastructure and Transport, Korea, "Bridge Design-General Design Method (KDS 24 10 10: 2018)", ~ (2018)
- Nam, D. W., "Resonance Characteristics of a Arch Bridge for High-Speed Railways", Korean Society of Steel Construction, 20(4), pp.455~467 (2008)
- Oh, J., "Dynamic Behavior and Resonance Reduction of Two-Span Continuous Bridges for Korean Train eXpress", Journal of the Korean Society of Civil Engineers, 28(1A), pp.95~104 (2008)
- Oh, S. T., "Dynamic Behavior Analysis of PSC Train Bridge Friction Bearings for Considering Next-generation High-speed Train", Journal of the Korea Institute for Structural Maintenance and Inspection, 27(6), pp.39~46 (2023), KSMI
- Sabamehr, A., "System identification and model updating of highway bridges using ambient vibration tests", Journal of Civil Structural Health Monitoring, 8(5), pp.755~771 (2018)
- Wu, J., "Swarm Intelligent Optimization Conjunction with Kriging Model for Bridge Structure Finite Element Model Updating", Buildings, 12(5), pp.504~ (2022)
- Xu, G., "Predicting the Remaining Useful Life of Corroding Bridge Girders Using Bayesian Updating", Journal of Performance of Constructed Facilities, 35(5), pp.04021055~ (2021)
- YiFei, L., "Structure damage identification in dams using sparse polynomial chaos expansion combined with hybrid K-means clustering optimizer and genetic algorithm", Engineering Structures, 283 (2023)
- Yin, T., "A Practical Bayesian Framework for Structural Model Updating and Prediction", ASCE-ASME Journal of Risk and Uncertainty in Engineering Systems, Part A:Civil Engineering, 8(1), pp.04021073~ (2022)
- Yoon, S. G., "Evaluation of Bridge Load Carrying Capacity of PSC Girder Bridge using Pseudo-Static Load Test", Journal of the Korea Institute for Structural Maintenance and Inspection, 23(4), pp.53~60 (2019), KSMI
- Abaqus, "Abaqus cae. Ver. 2023. Vélizy-Villacoublay, Dassault Systèmes", ~ (2023)