Improve the Flexural Behavior of One-Way Ribbed Slab by Using CFRP Sheet

Abstract

One of the most important research projects in the recent years is strengthening structures. The significance of these studies was to modify the ability of buildings to withstand high loads without utilizing materials that hurt the environment. Six one-way ribbed slabs were experimentally tested in the present study to determine the effect of carbon fiber reinforcement polymer sheets on the structure. One of the specimens, used as a reference, was unstrengthen. Two specimens were strengthened with carbon sheets on 50% and 100% of the rib width. To prevent sheet debonding, two others used 50-mm-wide U-shaped strips. A complete rib wrap served as the final method of strengthening. All the specimens underwent concentrated load testing to investigate the ultimate capacity, deflection, stiffness, and ductility. According to the findings, all specimen’s deflection decreased in a ratio ranging from 4% in whole rib wrap to 46%. Also, the stiffness increased in all specimens, and the width of the carbon sheet insignificantly affected the stiffness, while the way of strengthening did. In the end, strengthening with 50% width has no discernible effect on the ultimate load (3%), whereas strengthening with 100% width raised by 41%, while adding U-shaped stripes increased the ultimate load capacity by 74% and completely wrapping the ribs increased by 132%.