Numerical analysis using finite elements of the bearing capacity of hybrid fiber reinforced concrete pipes
González, Federico Alejandro1; Rougier, Viviana Carolina2; Escalante, Mario Raúl2
1 Universidad Tecnológica Nacional, FRCU; 2 Universidad Tecnológica Nacional, FRCU, FRCon
doi:10.20906/CPS/CILAMCE2017-0537
Resumo
Reinforced concrete with two or more types of fibers, rationally combined (hybridfiber reinforced concrete, HFRC) may offer enhanced properties, especially in terms of ductility and crack control. The use of these concretes in drainage pipes, either partially or totally substituting steel meshes and bars of traditional reinforcement, might have a favorable impact on the optimization of the product in the precast industry from both a technical and economic point of view. The HRFC can be prepared and placed into molds in a similar way as for simple concrete, where the fibers are added to the mix just like any other aggregate. In this paper, as part of an initial stage of an on going research, the mechanical behaviour of hybrid reinforced concrete pipes (steel and polypropylene) is numerically assessed by simulation of the three-edge bearing test. The HRFC is modeled as a homogeneous material with equivalent properties (macro model), in which the characteristic parameters of the material, used in the simulation, are obtained through an experimental study. The problem is solved by a nonlinear finite element code in which a coupled damage and plasticity constitutive model is used.Finally, the results are compared with data obtained by another author.
Palavras-chave: Numerical analysis; bearing capacity; Concrete pipes; Hybrid fiber reinforced concrete