Effect of rectangular spiral stirrup on bearing capacity of RC beams under cyclic loading

Document Type : Research Article


1 Department of Civil Engineering, Faculty of Engineering, Shahid Chamran University of Ahvaz, Iran.

2 Department of Civil Engineering, Faculty of Engineering, Shahid Chamran University of Ahvaz, Ahvaz, Iran

3 Department of Civil Engineering, Faculty of Engineering, Shahid Chamran University of Ahvaz, Ahvaz, Iran.


Nowadays, civil engineers are looking for novel approaches to develop structural performance and the speed of building construction simultaneously. One of these approaches is using rectangular spiral stirrups instead of traditional stirrups in manufacturing of RC beams. Based on recent experimental studies, these beams have shown some advantages in performance when compared with beams reinforced by traditional stirrups and in some cases, the results were much better. In this study, at the first stage, two types of RC beams with rectangular spiral stirrup and traditional stirrups were simulated in the ABAQUS software and verified under monotonic loading. The shear capacity was measured and validation was performed based on the experimental force-displacement curves. Then, at the second phase of this research, another RC beam with traditional stirrups was simulated and was verified against push-over curves. Moreover, the force-displacement of monotonic loading and failure mode was obtained from an experimental study. Cyclic loading was applied to the beams with continuous rectangular spiral and traditional stirrups. Then, the performance of those simulations was compared by enveloping strength curves. But in the cyclic loading phase, in most cases, the performance of beams with these two transverse reinforcement methods was equivalent and in some cases, the traditional one was shown even better results.


Main Subjects

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