Journal of the Korean Society for Railway (한국철도학회논문집)

The Korean Society for Railway (한국철도학회)
권호 표지
DOI QR코드

DOI QR Code

Experimental Performance Estimate of a 40m PSC I Girder for Railway Bridges

40m PSC I형 철도교의 동적 성능 평가

  • Received : 2013.06.07
  • Accepted : 2013.09.22
  • Published : 2013.10.31
Download PDF
⟨ Previous Next ⟩

Abstract

Here we report the results of an experimental laboratory test to verify the applicability to railway bridges of a PSC I girder of which the upper flange thickness was increased to improve sectional performance. The thicker this flange is, the further upward the neutral axis is moved. If in this way the span length can be increased to 40m long, the bridge may be constructed with four girders instead of five. Therefore, construction cost could be lowered by reducing the weight of the long span structure due to increased sectional efficiency. It was also necessary to be certain that the dynamic performance of this relatively flexible structure would be applicable to railway bridges. Therefore numerical analysis, as well as static and dynamic tests, was carried out for a full-size PSC I girder. Based on these results, it was verified that the performance of the PSC I railway bridge satisfied the performance criteria of the design code.

기존의 도로 및 철도교에 널리 사용되는 PSC I 거더의 단면성능을 향상시키기 위해 거더 중앙부 상부 플랜지의 두께를 증대시켜 중립축을 상향으로 이동시키는 개념의 PSC I 거더의 철도교 적용을 위한 정/동적 성능을 시험실 시험을 통해 확인하였다. 이 개념의 PSC I 거더는 단면의 합리적 활용으로 거더의 경간장을 40m까지 연장하였으며 기존의 복선 철도교에 5주형이 사용되던 거더 본수를 4주형으로 줄여 건설비를 절감할 수 있다. 기존의 교량에 비해 장경간 경량화를 추구한 신형식 교량은 상대적으로 유연한 구조로 진동에 대해 사용성 측면에서 취약할 수 있으므로 동적성능에 대한 검토가 필요하다. 40m길이의 실물크기 거더 모형시험을 통해 정/동적 물리량을 추정하고 이를 유한요소 해석결과와 비교하여 타당성을 입증한 후 철도교량의 전산해석을 통해 철도설계기준에서 요구하고 있는 각종 동적 성능기준치의 부합여부를 확인 검증하였다.

Keywords

References

  1. T.-G. Lee, S.-W. Oa (2008) Comparison of Girder High and Construction Cost by Span in Various Types of Railway Bridge, Journal of the Korean Society for Railway, 11(5), pp. 471-476.
  2. K.-S. Kim, I.-H. Yang (2008) Development of New Type PSC Beam Girder Bridges in Korea, Magazine of the Korea Concrete Institute, 20(3), pp. 26-33.
  3. S.-H. Kang, T.-G. Choi, S.-J. Park, S.-I. Kim (2009) Dynamic Serviceability Estimation of the Simple Railway Bridge with PSC I Girder, Journal of the Korea Society of Hazard Mitigation, 9(1) , pp. 65-71.
  4. J.S. Sim, I.H. Bae, J.K. Kim (1999) An Analytical Study for Design of Long-Span Prestressed Concrete Bridge I-Girder, Journal of the Korean Society of Civil Engineers, 19(I-4), pp. 581-590.
  5. S.-H. Kim, J.-H. Ahn, J.-H. Won, Y.-J. Park, (2006) A Study on PSC I girder using Thermal Prestressed Steel Plate(TPSC), Proceeding of KSCE Conference, Gwangju, pp. 1456-1459.
  6. S.H. Kim, J.M. Jeong, J.W. Seo, Y.H. Park (2006) The Evaluation of Structural Performation for PSC I Girder deigned by Optimizing, Proceeding of KSCE Conference, Gwangju, pp. 1423-1426.
  7. S.I. Kim, W.S. Chung, E.S. Choi (2005) A Study on the Optimal Span Length Selection of Conventional Railway Bridges considering Resonance Suppression, Journal of the Korean Society for Railway, 8(2) , pp. 137-144.
  8. S.I. Kim, N.S. Kim, H.U. Lee (2006) Dynamic Performance Estimation of the Incrementally PSC Girder Railway Bridge by Modal Tests and Moving Load Analysis Journal of the Korean Society of Civil Engineers, 26(4A) , pp. 707-717.
  9. R.-K. Min, D.-Y. Sung, Y.-G. Park (2012) Experimental Evaluation for Damping Ratio Limit of Railway Bridge according to Structure Types, Journal of the Korean Society for Railway, 15(2) , pp. 154-161. https://doi.org/10.7782/JKSR.2012.15.2.154
  10. S.H., Han, M.S. Bang, W.S. Lee (2010) A Study on Dynamic Capacity Assessment of PSC Box Girder High Speed Rail Bridges Using Time Series Load , Journal of the Korean Society of Civil Engineers, 30(3A) , pp. 211-219.
  11. Korea Rail Network Authority (2011) "Railway Design Standard(Infrastructure)".
  12. EUROCODE 1 Part 2 (2006) "Actions on Structures : General actions -Traffic loads on bridges", European Committee for Standardization.