1,721,465 research outputs found
Rapporto dei danni provocati dell'evento sismico del 6 aprile sugli edifici scolastici del centro storico dell'Aquila. Report RELUIS, Rete dei Laboratori Universitari di Ingegneria Sismica, 2009
No full textStochastic model for multi-lane traffic effects on bridges
No full textIn modern approaches, the target and design values for traffic effects on bridges are obtained through suitable stochastic traffic models processing recorded traffic data. To this aim, several theoretical and numerical stochastic models have recently been proposed. Despite their elegance, theoretical models often have limited fields of application, while numerical models, particularly efficient when single-lane traffic flow is considered, turn out to be unsatisfactory when traffic in several lanes, or a combination of traffic actions with those from other sources must be dealt with. This paper presents a more general theoretical stochastic traffic model, which is able, not only to reproduce actual traffic, but to account for such traffic interactions as well. The model, based on an equilibrium renewal process of vehicle arrivals, can be used in all cases where sophisticated evaluation of real traffic effects is required, such as calibration of conventional load models in bridge codes, assessment of existing bridges, as well as the design and analysis of bridges with less traditional schemes or subjected to particular traffic conditions. The efficiency of the model is illustrated through meaningful applications
High-ductile partial-strength composite beam-to-column joints: experimental analyses and comparisons
No full textExperimental modal analysis and numerical modelling of steel-concrete composite bridges in the new HS railway lines
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Steel-concrete composite frames with rigid full-strength connections for seismic and fire loadings
No full textPrestazioni in caso di incendio di telai sismo-resistenti in soluzione composta acciaio-calcestruzzo
No full textLow-rise buildings equipped with Flag-Shaped Hystretic Devices (FSHD) and R.C. shear walls
No full textCyclic behaviour of uncorroded and corroded steel reinforcing bars
No full textIn the present work the results of a wide experimental test campaign on steel reinforcing bars, including monotonic tensile and low-cycle fatigue tests, the last ones able to reproduce the stress-strain condition induced by seismic events, are presented. The main aim of the research work consists in the analysis of the combined effects of seismic action and aggressive environmental conditions on the ductile behaviour of steel reinforcements: as a consequence, mechanical tests were executed also on samples previously subjected to exposure in salt spray chamber, evaluating the residual mechanical properties and dissipative capacity
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