Browsing by Keyword "Metallic structure"
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Item The fire-risks of cost-optimized steel structures: Fire-resistant and hot-rolled carbon steel(2021-04-10) Garcia, Harkaitz; Cuadrado, Jesus; Biezma, Maria V.; Calderon, Inigo; Tecnalia Research & InnovationThis work studies the behaviour of a steel portal frame selection under fire exposure, considering both span lengths and fire exposure times as variables. Such structures combine carbon steel (S275), fireproof micro-alloyed steel (FR), and coatings of intumescent paint with variable thicknesses, improving thereby the flame retardant behaviour of the steel structure. Thus, the main contribution of this study is the optimization of the portal frames by combining both steels, analysing the resulting costs influence on the final dimensions. Besides, the topological optimization of each steel component within the structure is also defined, in accordance with the following variables: weather conditions, span, paint thickness, and cost of steel. The results mainly confirmed that using both FR and S275 grades with intumescent painting is the Pareto optimum when considering performance, feasibility and costs of such portal frames widely used for industrial facilities.Item Impact detection system for structures during their storage and transport(NDT.net, 2016) Aranguren, Gerardo; Ortiz, Javier; Etxaniz, Josu; Murillo, Nieves; Maudes, Jon; Donado, Amaia; Rueda, Enrique; Perez-Marquez, Ana; Tecnalia Research & Innovation; PRINTEXThis paper considers the unexpected deterioration of structures due to impacts, within the scenario of Industry 4.0. More specifically, this research includes the detection of damages that cannot be seen using only a visual inspection and which might occur during the stages prior to the final assembly of the components on structures, i.e., the manufacturing, the transportation, the storage, and the delivery. The research is focused on the detection of damages inside structures due to unexpected impacts during the early manufacturing stages. In the case that any damage is detected, not only the strength of the impact is recorded, but also the date and time of the event are stored in the system memory. Hence, the continuous monitoring helps the correct identification of responsibilities for any damage incurred. Two panels, one metallic and one composite, were assessed using the developed system.