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Advances in Materials Science and Engineering
Volume 2014 (2014), Article ID 323909, 9 pages
http://dx.doi.org/10.1155/2014/323909
Research Article

Performance of BFRP Retrofitted RCC Piles Subjected to Axial Loads

1Anna University, Chennai, Tamil Nadu, India
2Department of Civil Engineering, Sun College of Engineering & Technology, Tamil Nadu, India
3Department of Civil Engineering, S.V.C. College of Engineering & Technology, Tamil Nadu, India

Received 1 August 2014; Revised 20 September 2014; Accepted 21 September 2014; Published 19 October 2014

Academic Editor: Dachamir Hotza

Copyright © 2014 Anandakumar Ramaswamy et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

Abstract

This paper deals with the behaviour of basalt fibre reinforced polymer (BFRP) composites retrofitted RCC piles subjected to axial compression loads. Currently the awareness of using FRP increases rapidly in engineering fields and also among public. Retrofitting becomes vital for aged and damaged concrete structures, piles, and so forth, to improve its load carrying capacity and to extend the service life. The load carrying capacity of piles retrofitted with basalt unidirectional fabric was studied experimentally. 15 nos. of RCC end bearing pile elements were cast with same reinforcement for axial compression experiment. Three piles were used as conventional elements, another 3 piles were used as double BFRP wrapped pile elements, and remaining 9 piles were used as retrofitted piles with BFRP double wrapping after preloaded to 30%, 60%, and 90% of ultimate load of conventional element. The effects of retrofitting of RCC pile elements were observed and a mathematical prediction was developed for calculation of retrofitting strength. The stress vs. strain relationship curve, load vs. deformation curve, preloaded elements strength losses are tabulated and plotted. Besides, crack patterns of conventional elements and tearing BFRP wrapped elements were also observed. The BFRP wrapped elements and retrofitted elements withstand more axial compressive load than the conventional elements.