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Numerical Analysis of Accumulated Sliding Distance of Pre-Stressed Concrete (PSC) Bridge Bearing for High-Speed Railway for Ubiquitous Technology
Abstract
Numerical analysis of PSC box bridge bearings for high speed KTX train vehicles has been carried out as a virtual simulation for Ubiquitous Technology. Improved numerical models of bridge, vehicle and interaction between bridge and train are considered, where bending and torsional modes are provided, whereas the exist UIC code is applied by the simplified HL loading. Dynamic and static analysed results are compared to get Dynamic Amplification Factors (D. A. F.) for maximum deflections and bending stresses up to running speed of 500 km/h. Equation from the regression analysis for the D. A. F. is presented. Sliding distance of the bearings for various KTX running speeds is compared with maximum and accumulated distances by the dynamic behaviors of PSC box bridge. Dynamic and static simulated sliding distances of the bearings according to the KTX running speed are proved as a major parameter in spite of the specifications of AASHTO and EN1337-2 focused on the distance by temperature variations.
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A dynamic analysis procedure is developed to provide a better estimation of the dynamic responses of pre-stressed concrete (PSC) box girder bridges on the Korea high speed railway. Particularly, a three dimensional numerical model including the structural interaction between high speed vehicles, bridges and railway endures to analyze accurately and evaluate with in-depth parametric studies for dynamic responses of bridge due to the high speed railway vehicles. Three dimensional frame element is used to model the PSC box girder bridges, simply supported span lengths 40 m. The high-speed railway vehicles (K-TGV) including a locomotive are used as 38-degree of freedom system. Three displacements (vertical, lateral, and longitudinal) as well as three rotational components (pitching, rolling, and yawing) are considered in the 38-degree of freedom model. The dynamic analysis by Runge-Kutta method which are able to analyze considering the dynamic impact factors are compared and contrasted. It is proposed as an empirical formula that the impact factors damaged the bridge load-carrying capacities occurs to the bride due to high-speed vehicle.
A dynamic analysis procedure is developed to provide a better estimation of the dynamic responses of bridge during the passage of high speed railway vehicles. Particularly, a three dimensional numerical model including the structural interaction between high speed vehicles, bridges and railway endures to analyse accurately and evaluate with in-depth parametric studies for dynamic responses of various bridge span lengths running KTX railway locomotive up to increasing maximum speed(450km/h). Three dimensional frame element is used to model the simply supported pre-stressed concrete (PSC) box bridges for four span lengths(40~25m). Track irregularity employed as a stationary random process from the given spectral density functions and irregularities of both sides of the track are assumed to have high correlation. The high-speed railway vehicle (KTX) is used as 38-degree of freedom system. Three displacements (Vertical, lateral, and longitudinal) as well as three rotational components (Pitching, rolling, and yawing) are considered in the 38-degree of freedom model. The dynamic amplification factors are evaluated by the developed procedure under various traveling conditions, such as track irregularity camber, train speed and ballast. The dynamic analysis such as Newmark- and Runge-Kutta methods which are able to analyse considering the dynamic impact factors are compared and contrasted.
Accumulated Sliding Distance of the Sliding Element in the Bridge Bearing
- C B Joh
- H J Yoon
- Y J Kim
Joh, C. B., Yoon, H. J., Kim, Y. J., "Accumulated
Sliding Distance of the Sliding Element in the
Bridge Bearing," Proceedings of Korean Society
of Civil Engineering, 2006, pp. 1319-1322.
▪저자소개▪
논문접수일: 2014년 12월 26일
A Study of Evaluation methods for Running Safety of Prestressed Concrete Box Bridge on the KTX high speed railway
- S T Oh
- D J Lee
- H S Kim
Oh, S. T., Lee, D. J., Kim, H. S., "A Study of
Evaluation methods for Running Safety of
Prestressed Concrete Box Bridge on the KTX
high speed railway," Journal of the Korean
Society of Hazard Mitigation, Vol. 11, No. 4,
August 2011, pp. 31-39.
Ernst & Sohn Verlag fur Architektar & Technische Wissenschaften Gmbh
- E Helmut
- K Wolfgang
Helmut E., Wolfgang K., "Structural Bearings,"
Ernst & Sohn Verlag fur Architektar &
Technische Wissenschaften Gmbh, Berlin,
Germany, 2002.