Rehabilitation of reinforced concrete slab-column system using CFRP sheets.

摘要

Flat slabs are commonly used in the construction of buildings and parking structures. Usually, these components are subjected to large shear forces and bending moment. For several reasons, cracks are inevitable in concrete structures, they decrease the structural capacity. In addition, these cracks usually accelerate corrosion of the structure's reinforcement. Due to the high cost of new construction, the need for rehabilitation and upgrade of concrete structures has increased.; This research focuses on the use of carbon fiber reinforced polymer (CFRP) sheets as a competitive technique to reinforce and restore the capacity of a cracked flat-plat slab. Particular attention is paid for the slab-column connection. A series of tests were conducted on six slab-column connections specimens. The effect of the load eccentricity is selected as the main design parameter for this study.; Results show that the ultimate load capacity of the rehabilitated structures increased by an average of 88%. However, the effectiveness of the rehabilitation reduces with the increase of the eccentricity.