Experimental analysis of reinforced concrete columns strengthened with self-compacting concrete and connectors

Resumen

Many are the problems involving the ruin of buildings and other structures. Columns may deteriorate due many reasons even to the evolution and change of habits. The experimental phase of this study was based on a test involving nine reinforced concrete columns under combined bending and axial compression, at an initial eccentricity of 60 mm. Two columns were used as reference: one had the original measurements and the other, a monolithic column, was cast along the thickness of the strengthened model. The remaining columns were coated with a 35 mm thick layer of self-compacting concrete on the compressed face. To prepare the interfacial zone between the two materials, this surface was scarified and furrowed. Connectors linked to columns’ shear reinforcement were placed on the surface in various positions and amounts. Not only the number, but also the position of the connectors used is crucial to increase strength and to change failure mode.