Stress Analysis of Hexagonal Element for Precast Concrete Pavements
While the use of cast-in-place concrete for an airfield and highway pavement overlay is very common, the application of precast concrete elements is very limited today. The main reasons consist of high production costs and complex structural behavior. Despite that, several precast concrete systems have been developed and tested with the aim to provide a system with rapid construction. The contribution deals with the reinforcement design of a hexagonal element developed for a proposed airfield pavement system. The sub-base course of the system is composed of compacted recycled concrete aggregates and fiber reinforced concrete with recycled aggregates place on top of it. The selected element belongs to a group of precast concrete elements which are being considered for the construction of a surface course. Both high costs of full-scale experiments and the need to investigate various elements force to simulate their behavior in a numerical analysis software by using finite element method instead of performing expensive experiments. The simulation of the selected element was conducted on a nonlinear model in order to obtain such results which could fully compensate results from experiments. The main objective was to design reinforcement of the precast concrete element subject to quasi-static loading from airplanes with respect to geometrical imperfections, manufacturing imperfections, tensile stress in reinforcement, compressive stress in concrete and crack width. The obtained findings demonstrate that the position and the presence of imperfection in a pavement highly affect the stress distribution in the precast concrete element. The precast concrete element should be heavily reinforced to fulfill all the demands. Using under-reinforced concrete elements would lead to the formation of wide cracks and cracks permanently open.
Digital Object Identifier (DOI): doi.org/10.5281/zenodo.3299887Procedia APA BibTeX Chicago EndNote Harvard JSON MLA RIS XML ISO 690 PDF Downloads 385
 C. Olidis, D. J. Swan, A. Saeed, A. C. Mellerski and M. I. Hammons, "Precast Slab Literature Review Report: Repair of Rigid Airfield Pavements Using Precast Concrete Panels-A State-of-the-Art Review (Final Technical Report)", 2010.
 A. S. Reza, G. Haro, “Performance Determination of Precast Concrete Slabs Used for the Repair of Rigid Pavements (Final report)”, 2014.
 J. Novak, A. Kohoutkova, V. Kristek, V. Vodicka," Precast concrete pavement – systems and performance review," Building up Efficient and Sustainable Transport Infrastructure (BESTInfra2017). Bristol: IOP Publishing Ltd. IOP Conference Series: Materials Science and Engineering. vol. 236. ISSN 1757-8981, 2017.
 Cesky normalizacni institut. CSN EN 13369 Spolecne ustanoveni pro betonove prefabrikáty = Common rules for precast concrete products.
 J. Novak, A. Kohoutkova, "Optimization of Pretensioned Steel Fibre Reinforced Concrete Beam," Proceedings from 21st Czech Concrete Day 2014. Pfaffikon: Trans Tech Publications Ltd., pp. 94-97. Advanced Materials Research. ISSN 1022-6680. ISBN 978-3-03835-474-1, 2015.
 T. V. Do, T. M. Pham, H. Hao," Numerical investigation of the behavior of precast concrete segmental columns subjected to vehicle collision," Engineering structures 156, pp. 375-393,2017.
 Cesky normalizacni institut. CSN EN 1992-1-1 Navrhovani betonovych konstrukci. Ceska komora autorizovanych inzenyru a techniku cinnych ve vystavbe.