Flexur Palerformance of Concrete Members Reinforced with Mechanically Spliced Bars

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Addis Ababa University


Flexural performance test was conducted on five reinforced concrete beams. The beams were reinforced with steel bars which were connected using couplers. All the connections were at mid-span. This investigation incorporates two types of mechanical connection detailing. Three of the beams were reinforced with all the bars connected by couplers, one beam was reinforced with 50% of the reinforcing steel bars connected by coupler and at constant moment region of the mid span while the remaining beam was a control member with no mechanical splicers. All the beams were subjected to cyclic loading. The range of stress was the predominant factor to determine the flexural behavior of mechanically connected bars at the joint within the concrete beams specimens. Beams reinforced with 100% mechanically connected bars developed similar flexural performance and failure modes. Five reinforced concrete beams were cast for this research purpose. The beams were loaded with cyclic loading and all specimens had almost the same general behavior at respective maximum loading. Furthermore, it was observed that spliced longitudinal re-bars caused the yield load to be reduced by 13.5% and yielding displacement increased by 10.33% with different maximum capacity. In addition to these the ductility of specimens decreased by 9.5% compared to B1. As per the observations of this study parallel threaded coupler connected bars satisfying the manufacturer criteria’s can be considered as a continuous bar with increased strain, deflection and cracking properties at the joint.



Spliced Bars, Flexur Palerformance, Concrete, Reinforced