ISSN 2321-807X Volume 13 Number10 Journal of Advances in chemistry 5944 | Page February 2017 www.cirworld.com Mathematical Prediction for BFRP Retrofitted after Fatigue Loading of Concrete Specimens Dr. R.Anandakumar 1* , Dr. M.S.Ravikumar 2 , Dr. C. Selvamony 3 1* Professor, Department of Civil Engineering, Mahakavi Bharathiyar College of Engg. & Tech., Athuvali, India. dr.ranandakumar@gmail.com 2 Professor, Department of Civil Engineering, PSN College of Engg. & Tech., Melathediyoor, India. ravikumar_ms@yahoo.com 3 Professor, Department of Civil Engineering, PSN College of Engg. & Tech., Melathediyoor, India. selvamony_2007@yahoo.com ABSTRACT This paper deals with the experiment investigations on the Basalt Fibre Reinforced Polymer composites wrapped concrete specimens for determining the mathematical prediction for retrofitting of concrete specimens. For the past three decades, fibres are being effectively utilized in engineering fields. Some countries do not have specified codes for structural designing of Fibre Reinforced Polymer composites. Especially for this situation, the mathematical predictions were determined by experimentally for Basalt Fibre Reinforced Polymer composites retrofitted concrete. For this experiment, cubes, cylinders and prisms were cast using M30 grade concrete to analyze the characteristic strengths. The tests were carried out with and without Basalt Fibre Reinforced Polymer wrapping and retrofitted after 0%, 30%, 60% and 90% fatigue loaded or preloaded specimens. The retrofitted specimens with Basalt Fibre Reinforced Polymer wrapping, even after 90% fatigue loaded possess higher strength than conventional one. The observed readings were analyzed and mathematical prediction was developed by using readings and graphical representations. From the study, similar results were observed through experiments and mathematical predictions. Keywords Basalt Fibre, Polymer, Wrapping, Preloading, Retrofitting, Characteristic strength, Formula. Academic Discipline And Sub-Disciplines Civil Engineering SUBJECT CLASSIFICATION Polymer Composite TYPE (METHOD/APPROACH) Experimental Analysis 1.INTRODUCTION Retrofitting means strengthening the deteriorated or damaged structures with suitable technology for keep the originality for long service. Retrofitting needs for safeguard the structure for long service and upgrade the load bearing capacity of structure. Generally, a structure is designed for a particular service period. In this period the structures may be affected due to fatigues, creep loss, wear, gradual loss of strength, multiple environments effects, natural hazards, etc. In these conditions, the structures should be retrofitted for extending the service life. In engineering field lot of retrofitting methods available such as coating, external stressing, grouting, guniting, jacketing, overlaying, re-baring, sealing, stitching, wrapping, underpinning etc. From these, the wrapping method is very simple and handy method to retrofit structures. Besides, it does not require heavy tools & skilled labours. In this paper fatigued concrete specimens retrofitted with Basalt Fibre Reinforced Polymer composite (BFRP) wrapping for determining the strength by mathematical predictonly. According to that lot of research papers were reviewed and Fibre Reinforced Polymer (FRP) composite wrapping technique was studied. The mathematical model was found to predict the effects of FRP lamination and the reduction in the steel reinforcement area due to corrosion on the beam. This model predicts the flexural response of corroded RC beams laminated using Carbon Fibre Reinforced Polymer composites (CFRP). Ten identical corroded FRP beams were experimented for compressive strength and flexural strength. Besides, computed with ACFRP-04 program and examined the accuracy of the mathematical model and it was found that the model accurately predicted the load-deflection relationship of corroded FRP beams which was observed in the laboratory [1]. Non-linear analysis had been made to predict the behaviour of CFRP confined concrete. Using finite element (FE) method, specific expressions for modeling of the non-linear behaviour of confined concrete specimens were presented. Using this expression CFRP confined specimen was modeled with ANSYS software. The presented expressions were verified with the results of experiments conducted for axial load and flexural moment. The result showed suitability of the model in terms of accurately representing the experimental results.