Effects Of Coarse Aggregate Size On Shear Strength Of Reinforced Concrete Beam With Web Reinforcement

Mechanism of flexural failure of a rectangular reinforced concrete beam was much simpler tornunderstand as compared to shear failure. In fact shear failure of reinforced concrete beams is arnvery complex phenomenon due to involvement of too many parameters. rnIn spite of many decades’ experimental research and use highly sophisticated analytical tools shearrnfailure is not yet fully understood. Furthermore if a beam is not properly designed shearrnreinforcement is overloaded to failure shear collapse is likely to occur suddenly with no advancernwarning of distress. This is in strong contrast with the nature of flexural failure. Though aggregaterninterlock is one of the determinant behavior in shear, its behaviors and contributions are not clearlyrnstated yet on shear. But scholars have figured out that the shear stress that can be transmitted alongrncracks is related to concrete strength, crack width and aggregate size. From among factors thatrndetermines the shear performance of RC beam we want to identify the effect of aggregate size.rnHere we are always controlling the other parameters that determines the shear performance of RCrnbeam. rnObjective of this research was to identify how aggregate size will influence the shear strength ofrnreinforced beam with shear reinforcement. And with specific objective to analyze the effects ofrnaggregate size on shear strength. To determine size effects numerically (i.e. the effective diametersrnof aggregate for shear performance). To recommend the most effective aggregate size for shearrnperformance of reinforced beam with shear reinforcement. rnThis research paper is based on the experimental results of eight (8) RC beams test as specimenrnby changing the aggregate size and by controlling the other parameters to analyze the impact ofrnaggregate size on the shear performance of RC beam with web reinforcement. rnAfter performing an experimental program at AAiT construction material laboratory on differentrnnominal aggregate sizes; it was noticed that, as the aggregate size increase there is a significantrnincrease in shear performance and an increase in the ductility of RC beams that has been underrnexaminations.

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