EXPERIMENTAL INVESTIGATIONS ON FLEXURAL STRENGTHENING OF TIMBER STRUCTURES WITH CFRP

This paper presents a study of reinforcement techniques for restoration and strengthening of existing timber floors under bending loads, based on the use of carbon fibre reinforced plastics on the building site, whereas the removal of the overhanging part of the structure as well as the inserted ceiling is not necessary. Commercial adhesives, as well as products modified for this particular application, were tested. The tests showed, the arrangement of the reinforcement, the bond surface quality and the stiffness of the load transmitting materials were of decisive influence for the overall strength of the specimen. The presented paper provides a summary of recent test series and investigations on structural upgrading and debonding failure of timber floors using CFRP’s