Eventos Anais de eventos
COBEM 2017
24th ABCM International Congress of Mechanical Engineering
On the damage evolution of reinforced concrete I-beam bridges due to dynamic vehicle-structure interaction
Submission Author:
Ana Imai , PR
Co-Authors:
Ana Imai, ROBERTO Dalledone Machado, Thiago Abeche, Marcos Arndt
Presenter: Ana Imai
doi://10.26678/ABCM.COBEM2017.COB17-2390
Abstract
Reinforced concrete is used as structure system on highway bridges. The dynamic loads generated from the passage of vehicles on it can decrease the integrity of the concrete, as well as the reinforcement. For a more feasible analysis, the damage mechanics allows the representation of the concrete’s crack propagation. It is adopted a constitutive nonlinear dynamic damage model based on the Mazars’ damage model, which also regards the effects of the inversion of mechanical solicitations due to vibrations. Similarly, a more representative approach of the reinforcement is achieved by the account of the plasticity of the steel. Those phenomena enhance the model complexity, transforming it in a nonlinear dynamics problem, whose resolution is obtained by associating Newmark’s method with Newton-Raphson’s iterative technique. This works seeks to evaluate the nonlinear dynamic effects on a bridge’s beam, modeled trough Finite Elements Method, using the ABXDNL 2.7 program. Additional routines were developed in C++ programming language in order to consider different cross sections, variable geometries, as well as non-constant distribution of the reinforcement.
Keywords
Bridge Computational Modelling, nonlinear dynamics, Damage Mechanics, Dynamic Interaction, Finite Element Method
