Influence of Type of Contact of RC Beam and Strengthening Slab on Limit States of Strengthened Element

摘要

The paper deals with an issue of strengthening of damaged RC beams by a coupling slab. Within the experimental programme, the non-strengthened beams had been first loaded up to the level 0.7, consequently were strengthened by an overconcreted slab and loaded up to the failure. The mutual coupling was performed by different techniques. We complete obtained results of tests of an influence of a contact type of a repaired beam and a slab on a resistance, serviceability characteristics and a failure mode of a resultant strengthened element. The experimental results are compared, and thus serve as their verification, with designed values of resistance determined according to the corresponding standard and also with results of numerical simulations performed using the commercial software ATENA.