This investigation aims to compare the torsion capacity between concrete beams reinforced with 90-degrees cogs (non-standard) and those with 135-degrees hooks (as specified in AS3600). It will also evaluate the ability of carbon fibre-reinforced polymers (FRP) to strengthen non-standard beam members.
An experimental program was conducted and the relevant literature reviewed for this study. A summary of the literature and details of the experimental procedure is presented, followed by a discussion of the results data.
The study reveals that the form of non-standard transverse reinforcement considered does not have a reduced torsional capacity compared to that specified in AS3600. It also confirms that a full wrap of carbon fibre significantly increases the stiffness and strength of concrete beams loaded under pure torsion.