## 1 Introduction
The two basic methods most commonly used in strengthening RC beams with FRP material are: strengthening by gluing laminates of FRP material on the surface of concrete beams--EB method; and strengthening by mounting bars or narrow strips of FRP material in grooves made in the cover of concrete--NSM method. While most available research suggests that the NSM method, in particular the NSM method with strips, is able to take advantage of the higher strength of a FRP material compared to the EB method, several comparative studies have indicated that NSM is a non-economic solution [14; 15; 16]. The main disadvantage of the NSM method compared to the EB method is the price. The increase in price is due to the larger volume of labor when cutting the grooves in which the reinforcement will be mounted, as well as the larger amount of epoxy adhesive necessary for filling the grooves compared to the EB method. Since the use of self-compacted concrete started (Japan, 1980), it has been evident that its implementation has been increasing, whereby development and research has been intensified in the last several years. The term self-compacting concrete (SCC) refers to a high-performance concrete, which does not require additional vibrating in the placement process. It is capable of fully filling the formwork exclusively under the action of gravity, even in the presence of a considerable amount of reinforcement, simultaneously retaining its consistency without any emergence of segregation [17; 18; 19; 20; 21; 22; 23]. When it comes to application of SCC for the structural elements, almost all research conducted so far relates to a simply supported beam, except for a few studies on a two-span continuous beam. In [24], the beams were examined both for bending and shear. Their behavior under the effect of short-term static loading corresponds to the behavior of the beams made of conventional vibrated concrete (VC). The conditions defined by the regulations for constructions of VC are met as well. An experimental study of flexural behavior of two-span continuous beams made of SCC is presented in [25], where the parameter that varied is the percentage of tensile reinforcement. Abaqus/Standard software is used in that study for developing an adequate nonlinear numerical model. The main objective of this paper was to analyze the flexural performance of RC continuous beams made of SCC strengthened with FRP materials, as there is a lack of such research. The experimental tests of six two-span continuous beams of a total length of 3200 mm, with the span between supports of 1500 mm, with 120/200 mm cross section made of SCC, was done. The influence of the type of the FRP material, position of the reinforcement and the method of the strengthening on the ultimate load capacity, as well as on the failure mode of continuous beams made of SCC was analyzed. Since most researches are focused on the behavior of beams made of conventional RC strengthened with the FRP reinforcement, this research gives an insight into the flexural performance of continuous SCC beams strengthened with the FRP reinforcement, which is very important bearing in mind the increasing use of SCC in civil engineering.