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Purpose The purpose of this paper is the numerical assessment of concrete behaviour close to failure, via the development of robust elastoplastic models inclusive of damage effects. If mesoscale investigations are to be considered, the... more
Purpose The purpose of this paper is the numerical assessment of concrete behaviour close to failure, via the development of robust elastoplastic models inclusive of damage effects. If mesoscale investigations are to be considered, the model must take into account the local confinement effects because of the presence of aggregate inclusions in the cement paste and, correspondingly, the possibility to account for local 3D stress states even under uniaxial compression. Additionally, to enhance the predictive capabilities of a mesoscale representation, the reconstructed geometry must accurately follow the real one. Design/methodology/approach The work provides a procedure that combines a 3D digital image technique with finite element (FE) modelling thus maintaining the original 3D morphology of the composite. Findings The potentialities of the proposed approach are discussed, giving new insights to a FE modelling (FEM)-based approach applied together with a computer-aided design. Coupl...
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The principal objective for this work was to extend the field of application of FEM to space frame beam-column connections under static loading and with lateral displacements. A four-storey building was modelled under static load... more
The principal objective for this work was to extend the field of application of FEM to space frame beam-column connections under static loading and with lateral displacements. A four-storey building was modelled under static load condition. Horizontal and vertical structural elements were designed according to Eurocode 2. In order to understand the behavior of the external node made by under column, two beam and upper column, two models using correct boundary condition and nonlinear behavior of materials have been done using Abaqus Software The analysis was performed on an interior and an exterior joint models each in two conditions: unconfined and confined joint varying the distributions of number of stirrups for the beam reinforcement and the column reinforcement .A sup structural model to submit to numerical analysis have been performed, the Concrete Damage Plasticity model (CDPM) has been chosen for fit the nonlinear behavior for the concrete and the elastoplastic model has been...
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In this paper a new procedure for structural assessment of tunnel construction during fire is presented. In particular, it consists of two steps: the first one deals with a realistic evaluation of thermal fluxes, both convective and... more
In this paper a new procedure for structural assessment of tunnel construction during fire is presented. In particular, it consists of two steps: the first one deals with a realistic evaluation of thermal fluxes, both convective and radiative, for the whole tunnel. In the fires recently occurred in some European tunnels, the duration of the tire was longer than expected and the produced temperature fields were much more severe than those considered in standard codes, Therefore, such a kind of evaluation is of great importance. As the second step, a simulation of the hygro-thenno-mechanical behaviour of concrete structure will be carried out using thermal fluxes previously calculated as thermal input for a fully coupled code, which considers concrete as a multiphase porous material,
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Research Interests: Chemical Engineering, Civil Engineering, Applied Mathematics, Materials Science, Mechanics, and 14 morePlasticity, Geotechnical Engineering, Finite element method, Media, Transport Phenomena in Porous Media, Transport, Porous Media, Finite Element Model, Heat Flow, Finite Temperature Field Theory, Porous Medium, Time Domain, Porous, and Temperature field
A numerical procedure is presented for thermomechanical analysis of three-dimensional steel structures subject to fire. The procedure is based on finite element method and weighted residual approach in Galerkin form. It is applied for... more
A numerical procedure is presented for thermomechanical analysis of three-dimensional steel structures subject to fire. The procedure is based on finite element method and weighted residual approach in Galerkin form. It is applied for modelling the time transient of a fire together with subsequent phase of fire extinguishment