Study of Stress Strain Behavior Of Bfrp Confined Concrete Columns
Author(s):
Arathi Krishna, Milu Mary Jacob
Keywords:
Basalt Fibre Reinforced Polymer, Confinement, Short column, strain efficiency, Ultimate strength
Abstract
Earlier the methods adopted for the repair and rehabilitation were external bonding of the damaged component with steel fibres and steel jackets. But the major problem that caused due to this steel components are corrosion. The reinforcement corrosion and structural deterioration in reinforced concrete structures are common problems and inspired many researchers to find alternative materials and techniques. Strengthening with Fibre Reinforced Polymer (FRP) composite materials in the form of external reinforcement is of great importance in civil engineering.These sheets provides a passive confinement to the concrete core and it react against the lateral dilation of the column under compression which delays the failure of the column under the load and has shown to improve the strength and ductility of the column.This paper presents the results of experimental study related to the strengthening of R C short columns strengthened with BFRP wrap under axial loading. The columns were bonded with BFRP sheets in single layer. The experimental results include stress-strain behaviour, ultimate stress, and ultimate strain. The parameters considered in this study are fully and partially wrapping. The specimens were wrapped fully and partially with BFRP jackets Testing is done under universal testing machine of 100 ton capacity. BFRP sheets of 0.12mm thickness are used for wrapping. From the results it is concluded that the Columns partially wrapped with BFRP sheets shows better performance compared to the fully wrapped columns. The strain efficiency was calculated with the help of conventional strain gauges and were compared with the strain efficiencies of control specimens. From the results obtained it is concluded that the BFRP wrapped columns shows better strain efficiency. Wrapping of BFRP sheets was very effective in increasing the axial strength and strain capacity of the columns.
Article Details
Unique Paper ID: 143953

Publication Volume & Issue: Volume 3, Issue 4

Page(s): 199 - 205
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