Modelo numérico mesoscópico para simular degradación y capacidad de carga última en estructuras de hormigón armado afectadas por corrosión

P. SANCHEZ,; A.E. HUESPE; J. OLIVER; S TORO

San Luis, Argentina.

Congreso; Congreso sobre Metodos Numéricos y sus Aplicaciones, ENIEF 2008; 2008

In this research work, a nite element strategy specially devised to simulate the structuraldegradation of corroded reinforced concrete members is presented. The proposed model is able to reproducemany of the mechanical effects induced by corrosion processes in the embedded steel bars and,mainly, their inuences on the structural ultimate load carrying capacity predictions. For these purposes,two different and coupled mesoscopic problems are considered. This mechanical model can beused to simulate generalized or localized reinforcement corrosion. Each component of the ReinforcedConcrete (RC) structure is modeled by means of a suitable nite element (FE) formulation. For the concrete,a cohesive model based on the Continuum Strong Discontinuity Approach (CSDA) is used. Thesteel reinforcement bars are simulated by means of a elasto-plastic model. The steel-concrete interfaceis simulated using contact-friction elements with the friction degradation as a function of the depth ofcorrosion attack. Experimental and previous numerical solutions are used to compare and validate theproposed models.Mecánica Computacional Vol XXVII, págs. 1417-1437 (artículo completo)Alberto Cardona, Mario Storti, Carlos Zuppa. (Eds.)San Luis, Argentina, 10-13 Noviembre 2008Copyright