CONSIDERATIONS ABOUT NON LINEAR STATIC ANALYSIS OF A REINFORCED CONCRETE FRAME RETROFITTED WITH FRP

In seismic areas there are a lot of buildings that need to be retrofitted. In some cases it is possible to apply fibre-reinforcement polymer/plastic (FRP) as rehabilitation method. Several researches have been developed this technology in the last years. But it is necessary to count on reliable methodologies for structural analysis of these structures. In some cases the codes require non linear analysis for the verification of design proposed as retrofit. And in this area it is necessary to do new researches. Considering this topic, the object of this paper is to evaluate the possibility of non linear static analysis for simulate the response of reinforced concrete frame retrofitted with FRP. We designed a reinforcement concrete frame with an old Argentinian code. This 2 dimensions frame had one floor and one span. This frame was built and then subject to a pseudo static test. The frame was retrofit with FRB, and then it was again subject to a pseudo static test. With two finite element programs we created a numerical simulation of the frame with/without a retrofit with FRP, and emphasized the possibility of both programs. We evaluated and compared the responses obtained. In the conclusions we describe recommendations about: i) parameters for the non linear static analysis of reinforced concrete frame with FRP; ii) requests that the code must include for this type of analysis.