Parametric Crack and Flexural Strength Analyses of Concrete Slab For Railway Structures Using GFRP Rebar

Hyeong-Bae Choe; Sang-Youl Lee

doi:10.7734/COSEIK.2021.34.6.363

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2021 Vol.34, Issue 6 Preview Page Next Page

Research Paper

Parametric Crack and Flexural Strength Analyses of Concrete Slab For Railway Structures Using GFRP Rebar GFRP 보강근을 적용한 교량용 콘크리트 도상슬래브의 균열 및 휨강도 변수 해석

31 December 2021. pp. 363-370

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Abstract

In this paper, we presented an optimized crack and flexural strength analysis of a glass-fiber reinforced polymer (GFRP) rebar, used as reinforcements for in-site railway concrete slabs. The insulation performance of a GFRP rebar has the advantage of avoiding the loss of signal current in an audio frequency (AF) track circuit. A full-scale experiment, and three-dimensional ﬁnite element simulation results were compared to validate our approaches. Parametric numerical results revealed that the diameters and arrangements of the GFRP rebar had a significant effect on the flexural strength and crack control performances of the concrete track slabs. The results of this study could serve as a benchmark for future guidelines in designing more efficient, and economical concrete slabs using the GFRP rebar.

Keywords

GFRP

flexural strength analysis

concrete slab

crack width analysis

본 연구는 이러한 단점을 보완하기 위해 철근을 대체하여 내산화성과 전기저항이 높은 GFRP 보강근을 적용한 도상슬래브의 최적 변수해석을 수행하였다. 철도 궤도슬래브에 적용되는 철근은 열차 운행 중 신호전류의 손실을 일으켜 열차의 안정성을 저해하며, 철근의 부식으로 내구성이 저하될 수 있다. GFRP 보강근의 직경 및 배근 개수 변화가 전체 콘크리트 도상슬래브의 휨강도 및 균열제어에 미치는 영향을 유한요소 변수해석을 통하여 상세분석하였다. 해석 결과, GFRP 보강근의 직경 및 배근을 합리화하여 제안하였으며 이러한 경우 기존 배근보다 더욱 경제적인 단면을 도출할 수 있음을 알 수 있었다. 본 연구로부터 도출된 결과는 향후 GFRP 보강근을 적용하여 도상슬래브를 설계하는 경우 보다 합리적이고 경제적인 단면을 산정할 수 있는 가이드라인이 될 수 있을 것으로 기대된다.

키워드

유리섬유보강근

휨 강도 해석

콘크리트 도상슬래브

균열 해석

References

Chung, S.B. (2020) Structural Performance Investigation of In-site Concrete Railway Slabs for Bridge Applications Using Glass-fiber Composite Rebars, Ph.D. Thesis, Andong Natioanl University, pp.121~124.

Denise, F., Jonna, M. (2019) DIANA-Finite Element Analysis, DIANA Documentation release 10.3, DIANA FEA bv.

Hauke, B., Maekwwa, K. (1999) Three-dimensional Modelling of Reinforced Concrete with Multi-directional Cracking, J. Materials, Conc. Struct., Pavements, JSCE, 45(634), pp.349~368. 10.2208/jscej.1999.634_349

Hong, H.S., Yoo, K.K., Rho, S.C. (2010) A Study on the Method of preventing from Reduction of AF Track Circuit Signal Current on a Ferroconcrete Roadbed, J. Korean Soc. Railw., 13(5), pp.500~503.

JSCE Standard Specifications for Concrete Structures (2012) Design, Technical Report Japan Society of Civil Engineers.

Kim, M.S., Lee, J.W., Ko, J.S. (2008) The Influence of Frequency on Wayside Transmitter of ATP System upon Reinforcing Bars in Concrete Slab Track, Proceedings of the KSR Conference, Korean Society for Railway, pp.685~700.

Korea National Railway (2021) Development of Railway Slabs Reinforced by the GFRP Rebar Instead of the Steel Rebar, Korea National Railway Research Report (No.2021-30502-003).

Information

Publisher :Computational Structural Engineering Institute of Korea
Publisher(Ko) :한국전산구조공학회
Journal Title :Journal of the Computational Structural Engineering Institute of Korea
Journal Title(Ko) :한국전산구조공학회 논문집
Volume : 34
No :6
Pages :363-370
Received Date : 2021-09-23
Revised Date : 2021-10-06
Accepted Date : 2021-10-06
DOI :https://doi.org/10.7734/COSEIK.2021.34.6.363

Journal of the Computational Structural Engineering Institute of Korea ISSN:1229-3059(Print) 2287-2302(Online) 한국전산구조공학회 논문집

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