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Please use this identifier to cite or link to this item: http://hdl.handle.net/123456789/11337

Title: Shear strength characteristics of reinforced concrete (rc) beams made from phyllite aggregates
Authors: Owusu Afrifa, Russell
Adom-Asamoah, Mark
Issue Date: Sep-2016
Abstract: This research work reports on the shear behavior of 26 reinforced concrete beams made of phyllite and granite aggregates. A comparative study on shear strength of 10 RC phyllite beams without web reinforcement and 10 RC granite beams without web reinforcement indicated higher shear loads in granite beams than phyllite beams. Six (6) RC phyllite beams with varying amount of web reinforcement were also tested. Five different shear design equations (BS8110, ACI 318-02, EC 2, NZS 3101 and AS 3600) were compared to check their predictability of the low strength phyllite and granite concrete beams. Results revealed that shear strength characteristics of phyllite RC beams without shear reinforcement compared well with that of granite RC beams. Comparing the five codes, it was realized that EC2 provided significant improvement in prediction uniformity of the low strength RC beams. Beams subjected to cyclic loads exhibited wider crack widths as compared to corresponding beams subjected to monotonic loading. First diagonal shear crack is independent of the amount of shear links and mode of application of the load (monotonic or cyclic). First diagonal shear crack load of beams without shear reinforcement was between 42-92% of the failure load whilst those of beams with shear links ranged from 42-58% of the failure loads. The phyllite concrete beams without shear links had lower post-diagonal shear resistance. It is suggested that anchorage of reinforcing bars in phyllite RC beams should be designed properly to ensure that premature failure under cyclic loads do not occur.
URI: http://hdl.handle.net/123456789/11337
Appears in Collections:College of Engineering

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