Ingeniería

URI permanente para esta comunidadhttps://hdl.handle.net/11441/34626

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Examinando Ingeniería por Autor "Baeza, F. Javier"

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  • Miniatura
    Acceso AbiertoPonencia
    Dynamic behavior of masonry chimney with different reinforcement schemes
    (Víctor Compán Cardiel [etc.], 2015) Bru, David; Baeza, F. Javier; Brotóns, Vicente; Ivorra, Salvador
    This paper presents a structural analysis of a masonry chimney built in the 1950’s, which is currently being catalogued as local interest heritage. These structures exhibit insufficient tensile strength to resist the seismic action because the masonry is not reinforced. For this reason, the aim of this work is to analyze different structural reinforcement schemes so the chimney is capable of withstanding seismic actions. Ten numerical models, for nine reinforcement configurations, have been defined using Ansys software. A glass fiber reinforced cement composite was always used as reinforcement. For each model, a modal analysis and time history analyses were made. Five different synthetic accelerograms were used for the structural analysis, according to NCSE02 Spanish standard. The final reinforcement, capable of resisting the seismic action, consisted of a helicoid wrap and eight longitudinal stripes along the shaft, and the inner and outer reinforcement of all masonry walls of the base.
  • Miniatura
    Acceso AbiertoPonencia
    Numerical modeling for the rebar bond behaviour in normal and high strength concrete
    (Víctor Compán Cardiel [etc.], 2015) Varona, F. Borja; Navarro, Miguel; Baeza, F. Javier; Ivorra, Salvador
    This paper presents a finite element model for the analysis of the bond behavior between steel rebars and concrete. This behavior is defined by the bond vs. slip curve in European standards (e.g. the CEB- 90) for normal strength concrete (NSC). Pull-out tests have been performed on both NSC and high strength concrete (HSC) specimens and the resulting curves are compared to numerical models implemented in a FEM software. In these models the contact behavior has been defined according to the Model Code CEB-2010 and a position controlled loading has been performed in order to trace the load-slip curve for comparison with experiments. The FEM model has been calibrated with basic mechanical parameters from both types of concrete (compressive and tensile stress, elastic moduli). The numerical modelling has proven suitable for the NSC bond behaviour. However, the CEB standard should be improved to account for the HSC bond behaviour.