MECHANICAL BEHAVIOR OF HIGH STRENGTH REINFORCED CONCRETE HAUNCHED BEAMS CONTAINING STEEL FIBER

In this study, mechanical behavior of prismatic and haunched beams which contain high strength self compacting concrete and specified amount of steel fibers is investigated. Totally 8 beams, 4 of them are prismatic and remaining 4 of them haunched, are loaded experimentally for the study. Parameters for the beams are geometry of beams, addition of steel fiber and stirrups. Inclination angle of the haunched beams is nearly 10o. Steel fiber amounts are % 0 and % 0.5 in the beams. Loading tests were implemented via four point loading test. During loading tests, load, deflection values were measured, formation and propagation of the cracks were followed. Experimental results indicate that addition of steel fiber affects both load capacity and deflection capacity of high strength reinforced concrete haunched beams positively. The experimental study resulted that addition of steel fiber has much more effect on the reinforced concrete high strength prismatic and haunched beams as compared to the normal strength beams having similar properties. Moreover, the results show that addition of steel fiber in the amount of % 0.5 or more can be preferred instead of stirrups for the high strength reinforced concrete haunched beams