Dynamic behavior of Track/Roadbed with Loading Frequency in Concrete Track through Full Scale Model Test

Chanyong Choi; Hunki Kim; Kiyoung Eum; Yunsuk Kang

doi:10.12814/jkgss.2014.13.3.039

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2014 Vol.13, Issue 3 Preview Page Next Page

Dynamic behavior of Track/Roadbed with Loading Frequency in Concrete Track through Full Scale Model Test 실대형 실험을 이용한 가진주파수 변화에 따른 콘크리트궤도의 동적평가

30 September 2014. pp. 39-47

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Abstract

In this study, the full scale model tests were performed with track-roadbed system such as Ho-nam high speed railway. The measured data gives good similar a roadbed pressure with equivalent depth to the Odemark’s theory. In the case of earth pressures have a under 50 kPa at upper-subgrade applying 330 kN static loading. Results of cyclic loading tests did not differ significantly from those of static loading test. The elastic displacement at HSB layer has a level of 1/100 compared to the 1 mm that it was evaluation criteria for speed up of High Speed Railway. Elastic displacement at subgrade layer was measured a level of 1/175. The dynamic characteristics of track-roadbed with loading frequency level were linearly increased under 35 Hz, while the wheel loading, displacement and acceleration of roadbed were decreased loading frequency above 35 Hz.

Keywords

Track roadbed

Full scale model

Loading frequency

Odemark’s theory

Concrete track

호남고속철도에 부설된 동일한 궤도노반시스템을 실제 열차하중이 가능한 실대형 가진시험을 통해 성능을 평가하였다. 실험결과 Odemark 등가깊이 이론에 의한 노반압력과 매우 유사한 것을 확인하였다. 콘크리트궤도에서 정적하중 330 kN을 재하 시 노반 상부의 토압은 50 kPa 이내로 발생하였고, 정적하중시험과 반복하중시험 결과는 비교적 큰 차이가 없었다. HSB의 탄성변위는 증속시험 시 관리기준값 1 mm에 비해 약 1/100 수준이며, 노반의 탄성변위량과 비교해볼 때 1/175 정도로 매우 작은 변위가 발생하였다. 가진주파수의 크기에 따라 궤도노반의 동적거동은 가진주파수가 35 Hz이하에서는 모든 측정값이 거의 선형적으로 증가하였으나, 35 Hz이상에서는 윤중, 변위, 지반가속도 등이 감소하였다.

References

1.Choi C.Y., Lee S.H., Eum K.Y. (2010), “A comparison of behavior of the roadbed of ballasted & Concrete track with Cyclic loading, Journal of the Korean Geosynthetics Society, Vol.9, Issue.3, 2010, pp.1-8.

2.Eisenmann J., Leykauf G., (2000), “Feste Fahrbahn Fur Schienenhahnen” Sonderdruck aus, Beton Kalender.

3.Eisenmann J., Leykauf G., (2001), “Beton-Fahrbahnen”, 2^nd Edition, Ernst&Sohn a Wiley Company.

4.Korea Railroad Research Institute (2011), Study on design standards of track system for the HSR at 400km/h, R&D/ 10PRTD-B056522-01.

5.Korea Rail Network authority (2008), A study on performance improvement of Interface for concrete track(Final report), 102 611H09-501-001.

6.Selig, E.T. and Waters, J.M. (1996), Track Geotechnology and Substructure Management, Telford, England.

7.PCA (1984), Thickness Design for Concrete Highway and Street Pavement, Portland Cement Association.

Information

Publisher :Korean Geosythetics Society
Publisher(Ko) :한국지반신소재학회
Journal Title :Journal of the Korean Geosynthetics Society
Journal Title(Ko) :한국지반신소재학회 논문집
Volume : 13
No :3
Pages :39-47
Received Date : 2014-05-09
Revised Date : 2014-09-11
Accepted Date : 2014-09-18
DOI :https://doi.org/10.12814/jkgss.2014.13.3.039

Journal of the Korean Geosynthetics Society ISSN:2508-2876(Print) 2287-9528(Online) 한국지반신소재학회 논문집

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