The Structural Engineer > Archive > Volume 67 (1989) > Issues > Issue 4 > Reinforced Steel and Polypropylene Fibre Concrete Corbel Tests
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Reinforced Steel and Polypropylene Fibre Concrete Corbel Tests

Tests carried out on 20 150 x 150 x 200 mm concrete corbels are reported. The corbels were reinforced with either fibres, or main bars and fibres. The volume fraction of steel or polypropylene fibres, or main bars, was kept constant at nearly 0.7%. Plain concrete corbels were also made and tested for comparative purposes. Parameters varied included fibre type, two shear span-to-depth ratios, and a limited range of compressive strengths of concrete. Only vertical loading was used during testing. Test results indicated that the addition of fibres improved both flexural and shear strengths of the corbels. When fibres with improved bond characteristics were used, the failure mode of some corbels changed from being diagonal splitting to flexure. The service loads were also increased by the addition of all types of fibre. Professor B.P. Hughes and N.I. Fattuhi