Indian Journal of Science and Technology

Abstract

Background/Objectives: This research is aiming to find the strength and deflection effect of external wrapping of Glass fiber in short column. Methods/Statistical Analysis: Usually external wrapping of glass fiber increases the strength and reduce the deflection. This study was planned to achieve this aspect to prepare thirteen columns. Entire column would be divided in to four categories. A first category is under conventional mix. Second, third and fourth is comes under Full, Unidirectional and Bi-directional wrapping. All the above categories are finally divided into single and double wrapping to find the effect of thickness of external wrapping. Findings: The ultimate strength found in this study was about 3.63% of the reference column for full wrapping with 2 layers of GFRP wrapping. For 4 layers, the increase is 6%. In case of horizontal strip wrapping, the increase is found to be 1.83% for 2 layers and 2.97% for 4 layers. For vertical strips, the increase is 2.74% for 2 layers and 4.61% for 4 layers. The ultimate axial strain was increased to 10% in case of full wrapping with 2 layers of GFRP Wraps and 25.9% in case of full wrapping with 4 layers. In case of horizontal strip wrapping the increase is 2.19% for 2 layers and 8.22% for 4 layers of GFRP compared to the reference column with no wrapping. For vertical strips the increase is 7.6% for 2 layers and 18.6% for 4 layers when compared to control columns. Similarly, ultimate lateral strain was increased to 12% in case of full wrapping with 2 layers of GFRP Wraps and 30.28% in case of full wrapping with 4 layers. In case of horizontal strip wrapping the increase is 1.83% for 2 layers and 9.62% for 4 layers of GFRP compared to the reference column with no wrapping. For vertical strips the increase is 3.17% for 2 layers and 19.95% for 4 layers compared to reference column. Applications/Improvements: The above wrapping is done by using Glass Fibre, because of the reason is to select Glass Fiber, and is economical and easily available one. Finally the load and deformation characteristics were studied.

Keywords: Deformation Characteristics, Glass Fibre Reinforced Polymer, Reinforced Concrete Column, Uni and Bi-Directional Single and Double Wrapping, Wrapping