Numerical Simulations of Rate/Time Effects in Concrete

Ricardo H. Lorefice, Guillermo Etse, Marcia Rizo Patron

Abstract


Structural response of concrete strongly depends on the nature of applied loads. Time varying loads can induce rate/time effects in concrete like increasing strength (rate effect) or basic creep deformation (under sustained loads). In this paper we present a computational approach that numerically simulates concrete mesostructure like a two-phase material. Each material phase is represented by continuum and interface finite elements which allow to track the crack trajectories under different loading scenarios. A specific rate-dependent interface constitutive law is included in the model in order to capture the rate/time effects and their incidence in the global structural response of the specimen.

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ISSN 2591-3522