Authors: S. Dias, M. R. Mostakhdemin Hosseini, J. Barros

To investigate the behaviour of RC slabs flexurally strengthened using NSM technique with prestressed CFRP laminates, an experimental program was carried out. A total of four RC slabs were tested, a reference slab (without CFRP), and three slabs flexurally strengthened using NSM CFRP laminates with different prestress level: 0%, 20% and 40% of the ultimate tensile strength of the CFRP material. The tested slabs have a percentage of longitudinal tensile steel bars of about 0.35%, while the CFRP strengthening percentage is approximately 0.08%. The obtained results are presented and analysed in terms of the structural behaviour of the RC slabs, failure modes and performance of the NSM technique with prestressed CFRP laminates.

S. Dias¹| M. R. Mostakhdemin Hosseini¹ | J. Barros¹
1 ISISE, Universidade do Minho, Guimarães, Portugal