This paper aims to present and analyze the results of an ongoing research project on the use of NSM and sideNSM-FRP composites for the purpose of increasing the load-carrying capacity of two-pan continuous RCbeams. This research study comprises two parts; an experimental part and a finite element (FE) part. First, threelarge-scale two-span beams were statically investigated; one control beam and two other beams initiallystrengthened in bending with two 6 mm diameter CFRP bars. Second, a three dimensional (3D) FE model wasdeveloped, using the computer software ABAQUS, in order to predict the flexural performance of the testedbeams and to investigate the influence of the models applied to the CFRP-resin-concrete interfaces. The resultsobtained indicated that the side-NSM-CFRP bars system is a convenient alternative to the conventional one forstrengthening continuous beams. For some strengthening configurations, the side-NSM technique proved to bemore efficient than the NSM technique, particularly when the CFRP bars were applied solely in the hoggingregion or the sagging regions. The moment redistribution of strengthened beams was negatively affected whenthe steel reinforcement ratio in the hogging region was increased. Nevertheless, the moment redistribution degree was significantly affected by the position and arrangement of the CFRP bars. The 3D-FE analysis developedwith the cohesive zone model can capture the main aspects observed from the experiments.