Strength of Concrete Cylinder Confined by Composite Materials

This paper investigates the strength of concrete cylinders confined by composites in three different ways. First, the relationship between number of composite layers and strength of confined concrete cylinder is studied. Carbon and glass fiber composites are used for confinement. Experimental results indicate that strength of the confined concrete cylinder increases in direct proportion to the number of layers of composites. Second, the stacking sequence effect from wrapping the concrete column with carbon and glass fiber together is studied. According to those results, the closer the glass composite is to the concrete cylinder implies a higher strength of the confined concrete cylinder. Third, this investigation attempts to partially wrap the concrete cylinder with carbon and glass fiber to investigate how the various wrapping methods differ. In addition, the strength of the reinforced concrete cylinder is also predicted. A simple failure model is derived from observing the experimental phenomena. Results by the simple model and the models developed to date are analyzed and compared with experimental data. The proposed simple model has more closely corresponded to the experiments.