Mechanical behaviour of TRM and FRP-reinforced concrete voussoir masonry specimens

Abstract

This research investigates, both experimentally and analytically, the mechanical performance of masonry specimens made with special lightweight concrete voussoirs joined with cement mortar and reinforced with TRM (Textile Reinforced Mortar) made of either fibreglass mesh, TRM with basalt mesh or FRPs (Fiber Reinforced Polymers). The specimens represent a segment of an arch. A total of 18 specimens were tested, with one-third featuring each reinforcement solution. Another variable studied was the number of sides reinforced with TRM or FRP, either one or three. The specimens were tested under eccentric compression to analyze the effectiveness of the reinforcements. An analytical model was calibrated with the experimental results and used to extrapolate the experimental results in terms of strength capacity. The specimens that exhibited the best mechanical behaviours were those reinforced with TRM using basalt mesh. The FRP reinforcement experienced prematurely debonding with the voussoirs.