Strength of Concrete Cylinder Confined by Composite Materials (CFRP)

摘要

This article presents the results of an experimental and analytical study on the behavior of standard concrete cylinders externally wrapped with fiber-reinforced polymer (CFRP) composites. The experimental work was carried out by testing /51/ cylinders. All the cylinders of dimensions 150x300 mm ,using local gravels, and Portland cement and high resistance (52.5)Mpa. Concrete cylinders subjected to pure compression (axial compression) with various confinement ratios. The parameters considered are the number of (CFRP) composites layers and direction fibers, and show failure modes for CFRP wrapped (failure by fabric rupture, concrete crushing) cylindrical concrete, investigates the strength of concrete cylinders confined by (CFRP) composites in three different ways. First, the relationship between number of composite layers and strength of confined concrete cylinder is studied; experimental results indicate that strength of the confined concrete cylinder increases in direct proportion to the number of layers of composites. Second, fiber orientation is one of the important parameters that affect strength and ductility of CFRP-confined. Third overlap length. Phase II of the study included a comparison between the experimental results and analytical results using the finite element, ultimate stress, rupture strain. The study included a comparison between the behavior of cylinders before and after the consolidation in terms of (stress-strain) and confined factor.