3 results for Podestà, S.

  • Experimental evaluation of the in-plane stiffness of timber diaphragms

    Brignola, A.; Podestà, S.; Pampanin, S. (2012)

    Journal Articles
    University of Canterbury Library

    The seismic response of unreinforced masonry (URM) buildings, in both their as-built or retrofitted configuration, is strongly dependent on the characteristics of wooden floors and, in particular, on their in-plane stiffness and on the quality of wall-to-floor connections. As part of the development of alternative performance-based retrofit strategies for URM buildings, experimental research has been carried out by the authors at the University of Canterbury, in order to distinguish the different elements contributing to the whole diaphragm's stiffness. The results have been compared to the ones predicted through the use of international guidelines in order to highlight shortcomings and qualities and to propose a simplified formulation for the evaluation of the stiffness properties.

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  • Seismic Retrofitting of Unreinforced Masonry Buildings in Italy

    Frumento, S.; Giovinazzi, S.; Lagomarsino, S.; Podestà, S. (2006)


    University of Canterbury Library

    The Italian heritage building stock is dominated by unreinforced masonry buildings widespread on the whole territory with rammed earth buildings peculiar of some regions. A major effort is given to strengthen or retrofit these buildings in order to improve their safety under seismic loading as well as to preserve them as memory of the ancient art of builders and as constitutive elements of the anthrop-environment. This paper describes traditional seismic retrofit interventions adopted in Italy. These retrofitting interventions, revised according to the modern technologies, derived from historical concept of aseismic devices (i.e. metallic tie-rods, circumferential tie-rods, buttresses, “diatoni”, wall connections, partial reconstruction of walls) suggested to the builders’ crafts by observation of earthquake damage and imposed by the past technical rules. A good degree of confidence on the feasibility, compatibility and effectiveness of these techniques for URM buildings is guaranteed after having been extensively tested during the centuries. Recently, technical national code-guidelines for the seismic retrofit of existing URM masonry buildings have been prepared with the specific purpose to help practitioner engineers to implement these solutions.

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  • Data analysis finalised to the calibration of vulnerability, damage and cost and reconstruction models for residential and strategic buildings (In Italian)

    Giovinazzi, S.; Lemme, A.; Podestà, S.; Resemini, S. (2007)


    University of Canterbury Library

    Molise Region has been in charge of the post-disaster reconstruction process for the municipalities of Campobasso district, after 31 October 2002 seismic event. A Delegated Commissary has been nominated and has developed the O.C.D. n.13/2003 provisions, fixing the criteria and the guidelines for the reconstruction processes of public and strategic buildings, infrastructure systems, residential and commercial buildings. The design documents produced during the reconstruction process and the damage surveys collected during the emergency phase, represent an extremely useful source of information for the comparison, calibration and integration of the models currently used at a different level of detail and precision for the: 1) vulnerability assessment, 2) the damage estimation, 3) the cost estimation of the resources necessary for the reconstruction process. In this work, intended to be the first step of a wider analysis, data and information about damage observed and estimated reconstruction costs have been extracted from the PPS synthetic database and compared with the ones resulting by the implementation of the macroseismic vulnerability method. On one hand, PPS damage data have been used to evaluate the reliability of the damage distribution resulting from the implementation of the macroseismic method for an essentially numerical and typological characterisation of the built-environment. On the other hand, the PPS costs for reconstruction have been compared with the ones resulting from the simulated scenario by the use of cost models currently implemented in the framework of territorial scale risk analysis.

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