Effect of Fibres on the behaviour of Bottle shaped strut

Bottle-shaped struts are the critical elements in design of D-regions using Strut-and-Tie method. The transverse tension develops due to dispersion compression load which further leads splitting crack bottle shaped strut. Due this, strut fails before reaching its ultimate capacity. Higher resistance can improve capacity and efficiency transfer. Transverse tensile stress be resisted by providing steel reinforcement or through addition discrete fibres concrete. Many international codes like ACI, AASTHO, CSA have suggested guidelines about fibre bottle-shaped for resisting tension. Still, influence on performance is not well established. terms factors, pattern failure mode different amounts macro micro polypropylene studied experimental investigation. Specimens 600mm x 600mmx 100mm size were tested under compression. Steel added proportions 0.7%, 0.9% 1.1% volume fractions Effect hybridization also adding 1% 2% fibres. Experimental results showed that concrete significantly improved led increased load-carrying specimens. A 75% improvement factor observed at addition. Addition enhanced struts. Microfibres effectively arrested micro-cracks delayed occurrence a first region. this changed ductile formation greater number small cracks with less width load. Results study clearly show an effective solution strength serviceability.