STRENGTHENING OF REINFORCED CONCRETE SLABS BY CROSS-SECTION ENLARGEMENT: CURRENT STATE AND PERSPECTIVES

Abstract

The article researches the strengthening of reinforced concrete floor slabs through cross-section enlargement. Various aspects (the impact of the thickness of the additional concrete layer, the use of shear connectors) of this method are considered, , The overall methods effectiveness for increasing the load-bearing capacity and deformability of the slabs are analyzed. The primary focus is on the analyzing the results of previous studies. The article highlights the benefits of using cross-section enlargement as a strengthening technique, especially in cases where other methods may be constrained by spatial or economic limitations. The article emphasizes the critical importance of bonding quality between old and new concrete layers in the process of strengthening reinforced concrete slabs. Achieving a strong and durable bond is essential, as poor adhesion can cause the  significant reduction of load-bearing capacity and potential structural failures. However, one of the most crucial but underexplored aspects of this strengthening method is the partial interaction between the layers when the bond is not fully achieved. Current research often neglects scenarios where the old and new concrete layers work together only partially, resulting in complex structural behavior that is difficult to predict. Recommendations for further research are provided. e Comprehensive experimental studies to determine influence of the real parameters on the method effectiveness is necessary. This research aims to fill existing knowledge gaps and provide practical guidelines for engineers to apply this technique more effectively in future construction and reconstruction projects.