An Experimental Study on Hybrid Fibre Reinforced Concrete Filled Steel Tube Columns

An Experimental Study on Hybrid Fibre Reinforced Concrete Filled Steel Tube Columns
Author(s):
Surya Ravindran, Afia S Hameed
Keywords:
CFST column,Hybrid fibre reinforced concrete.
Abstract
A Concrete-Filled Steel Tube (CFST) column comprises steel hollow section of circular or rectangular cross section filled with plain or reinforced concrete.Steel confinement helps to reduce columns size and confined columns possess excellent earthquake-resistance and fire resistance properties. M30 design mix concrete amalgamated with 0.75% steel fibre and 0.5% polypropylene fibre was chosen as hybrid fibre reinforced concrete (HFRC) which is used as an in-fill material for CFST columns. A total of 8 column specimens comprising of two normal RCC column and seven concrete-filled steel box columns were tested. The paper presents an experimental study on hybrid fibre reinforced Concrete Filled Steel Tube (HFRCFST) short columns axially loaded in compression to failure. Results show that in a CFST column the steel tube acts as longitudinal and lateral reinforcement for the concrete core and play an important role in increasing the compressive strength up to 85%. Failure of CFST columns was due to local buckling of the steel tube.
Article Details
Unique Paper ID: 143947 Publication Volume & Issue: Volume 3, Issue 4 Page(s): 180 - 187
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