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URI permanente para esta colecciónhttp://54.81.141.168/handle/123456789/124168

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Temasearch.filters.applied.operator.equals: search.filters.subject.Construcciones de adobe

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  • Miniatura
    ÍtemAcceso Abierto
    Nonlinear Dynamic Analysis of a Full-Scale Unreinforced Adobe Model
    (2014) Tarque, Nicola; Camata, Guido; Spacone, Enrico; Varum, Humberto; Blondet, Marcial
    This paper describes the results of a numerical study of a full-scale adobe building model tested on a shaking table. Material properties of adobe masonry were calibrated to represent the wall in-plane seismic behavior, based on a prior numerical analysis of an adobe wall carried out by the authors. The inelastic part of the constitutive model was represented by a softening curve in tension and by a hardening/softening behavior in compression; thus, the fracture energy is a key issue in the modeling process. A finite element model that relies on a homogenous continuum approach was developed in Abaqus/Explicit software. The damage evolution in the numerical simulation represented fairly well the experimental crack pattern, for in-plane and out-of-plane seismic effects. Overall, the calibrated material properties and the explicit solution scheme proved to be appropriate for simulating the seismic behavior and predicting capacity of unreinforced adobe structures subjected to seismic loading.
  • Miniatura
    ÍtemAcceso Abierto
    Displacement-Based Fragility Curves for Seismic Assessment of Adobe Buildings in Cusco, Peru
    (2012) Tarque, Nicola; Crowley, Helen; Pinho, Rui; Varumd, Humberto
    The seismic vulnerability of single-story adobe dwellings located in Cusco, Peru, is studied based on a mechanics-based procedure, which considers the analysis of in-plane and out-of-plane failure mechanisms of walls. The capacity of each dwelling is expressed as a function of its displacement capacity and period of vibration and is evaluated for different limit states to damage. The seismic demand has been obtained from several displacement response spectral shapes. From the comparison of the capacity with the demand, probabilities of failure have been obtained for different PGA values. The results indicate that fragility curves in terms of PGA are strongly influenced by the response spectrum shape; however, this is not the case for the derivation of fragility curves in terms of limit state spectral displacement. Finally, fragility curves for dwellings located in Pisco, Peru, were computed and the probabilities of failure were compared with the data obtained from the 2007 Peruvian earthquake.