Effect of steel fiber (sf)‎ content on behavior of high strength reinforced concrete circular columns

Abstract EN

This paper investigates the effect of steel fiber (SF) on the behavior of high strength fiber reinforced concrete (HSFRC) circular columns confined by spiral and subjected to monotonically concentric axial load.

Effects of key variables such as fiber content and concrete compressive strength were studied.

An experimental program was conducted to achieve the required objectives.

Six columns with circular cross sections were tested under axial loads.

They were divided as follows : one column without fiber as a reference column, three columns were cast to study the effect of fiber content and two columns were cast to study the effect of concrete compressive strength.

This paper highlights the effect of the studied variables on the gain of core strength, confinement factor, (cracking, ultimate) load and ductility.

It was found that, Content of fibres has great effect on improving the behavior of (HSFRC) circular columns.

Steel fibres optimum content that affects most of the characteristics of (HSFRC) circular columns is (0.5 (%.