strengthening of fire damaged concrete column using glass fibres
A.S.Kanaka Lakshmi,L.Lanish Jafrin,B.Hari Prasanth,A.Santhosh Kumar,P.prashanth kumar
Published in International Journal of Advanced Research in Civil,Structural,Environmental and Infrastructure Engineering and Developing
ISSN: 2320-723X Impact Factor:1.7 Volume:2 Issue:2 Year: 07 April,2016 Pages:175-184
Abstract
Extensive research has shown that glass fibre reinforced polymer GFRP wraps are effective for strengthening concrete columns for increased load capacity and deformability, and this technique is now widely used. This project extends the implication of Glass Fibre Reinforced Polymer GFRP confinement technique to strengthen fire damaged concrete columns. An experimental program was undertaken to study the compressive strength and stress strain behaviour of both unconfined and Glass fibre confined concrete columns after being heated to elevated temperatures for up to four hours and cooled to room temperature. The results show that GFRP confinement is highly effective for enhancing the load carrying capacity of even severely fire damaged concrete columns.Various results are carried out to test both fire damaged and glass fibre wrapped columns. Tests on compressive strength, Flextural strength and thermal radiation were carried out for three sets of concrete columns namely ordinary column, fire damaged column, fire damaged column wrapped with glass fibres. The results shows that strengthening is effective for columns affected by fire, which could effectively restore the strength and stiffness in fire damaged columns
Kewords
Glass Fibres, Fibre damaged concrete column, Compressive strength
Reference
• ACI 440R, State of the art report on fiber reinforced plastic reinforcement for concrete structures, American Concrete Institute Committee 440, 1996. • Bruce Ellingwood and Lin,T.D. 1991. Flexure and Shear behaviour of concrete beams during fires ,J.ofStruct. Engrg, Vol.117 2, 440.458. • Francisco, J., De Caso y Basalo, Fabio Matta, and Antonio Nanni. 2012. Fiber reinforced Cement based composite system for concrete confinement. Construction and Build. Mater.,Vol.32 55. 59.
