141 research outputs found
Capacità rotazionale e criteri di classificazione delle membrature di acciaio in zona sismica
No full textGenesi del profilo a doppio T ed analisi speditiva della efficienza strutturale delle membrature laminate a caldo
No full textClassificazione delle membrature in acciaio: ricalibrazione e generalizzazione del fattore di sovraresistenza s
No full textAssessment of the seismic performance of the iron roofing structure of the Umberto I Gallery in Naples
No full textIn this paper the seismic performance of the iron roofing structure of the Umberto I Gallery in Naples is investigated by means of a three dimensional finite element model. The geometric and mechanical properties of the structure have been obtained through a wide investigation on available historical documentation. The considered design actions, namely self-weight, wind, snow and seismic loads, have been evaluated and combined on the basis of the Eurocode provisions. The numerical results allow the actual safety factor respect to both the ultimate and serviceability limit states to be evaluated. Some considerations on the structural vulnerability to corrosion damage are also developed. In particular, the influence of the atmospheric corrosion has been assessed on the basis of a specific modelling procedure which takes into account the main factors affecting this phenomena
Oreste Ghisalba at the Heart of Biotechnology
No full textA personal account of the author\u27s relationship with Oreste Ghisalba over a period of almost 30 years is given
Finite element modeling of laser welded connections for built-up cold-formed steel beams
No full textA finite element model of laser welded connections was developed in this paper for the analysis of structural behaviour of built-up cold-formed steel members. The implemented FE model uses unidirectional elements with nonlinear generalized force-deflection capability and was calibrated on the basis of lap-shear experimental tests on laser welded connections carried out at the University of Naples. In order to validate the use of the implemented FE model, an application was presented to simulation of a built-up cold-formed beam assembled by multiple laser welds. In particular, the compression flange of the selected beam was investigated, by comparing experimental and numerical results
Laser welded built-up cold-formed steel beams: experimental investigations
No full textThe results of a research project aimed at designing and developing a built-up cold-formed steel beam assembled by laser welding are described in this paper. The research activity was concerned with the evaluation of the applicability of laser welded connections to cold-formed members and with the assessment of the load bearing capacity of the assembled beams. With this aim, both lap-shear and Utension tests were carried out on laser welds in order to assess the influence on connection strength of different parameters such as the gap between the steel sheets and the zinc coating. Finally, the load bearing capacity of laser welded built-up cold-formed members was investigated by four-point bending tests. Four full-scale prototypes were manufactured with different spacings of connections along the flanges in order to evaluate the effects of weld configuration on the load bearing capacity
Seismic assessment of historical mosques under exceptional earthquakes: a case study in Skopje
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