Effect of Steel fibre profile on the fracture characteristics of steel fibre reinforced concrete beams

Keywords: Steel fibre concrete, Ductility, Post crack toughness, Residual strength, Fracture toughness

Abstract

The present study investigated on the mechanical characteristics of different types of steel fibre substituted high strength concrete. Influence of steel fibre volume fraction and its complex profile characteristics on the strength properties of various fibre substituted concretes had been systematically studied in slender concrete beam sections. Reinforcing efficiency of concrete incorporating four types of steel fibres having same aspect ratio with varying fibre profile - single hooked ends, crimped, double hooked ends and kinked had been experimentally analyzed in flexural bending and fracture studies. Test results showed higher flexural post crack toughness (23.48 N-m) and fracture toughness (39.62MPa√mm) for double hooked steel and crimped steel fibres substituted concretes. Steel fibre concretes containing double hooked and kinked geometry exhibited higher ductility ratio and overall performance index. Also, high volume steel fibre substitutions (1.5% Vf) in slender concrete beams showed improved post crack ductility and characteristic length.

Author Biography

Sivakumar Anandan, Professor, Structural Engineering College of Engineering King Khalid University, Kingdom of Saudi Arabia

PROFESSOR IN STRUCTURAL ENGINEERING,

DAAD - GERMANY FELLOWSHIP 

14 YEARS IN TEACHING; 4 YEARS AS RESEARCH ASSISTANT

COLLEGE OF ENGINEERING

KING KHALID UNIVERSITY, ABHA.

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Published
2019-06-02
Section
Civil Engineering