Analisi di strutture prefabbricate monopiano considerando gli effetti P - Δ
Gli effetti P-Δ possono influenzare in modo significativo la richiesta sismica degli edifici prefabbricati monopiano. Sia la normativa europea che quella italiana prevedono alcune prescrizioni al fine di considerare tale fenomeno, quali la...
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Gli effetti P-Δ possono influenzare in modo significativo la richiesta sismica degli edifici prefabbricati monopiano. Sia la normativa europea che quella italiana prevedono alcune prescrizioni al fine di considerare tale fenomeno, quali la riprogettazione della struttura e l’amplificazione della richiesta sismica. In questo lavoro si descrive uno studio parametrico eseguito al fine di: (a) valutare l'influenza degli effetti P-Δ sulla risposta sismica diedifici prefabbricati e (b) valutare l'efficacia delle prescrizioni normative. In particolare, lo studio prevede l’analisi di numerose strutture, utilizzando diversi approcci progettuali e diverse ipotesi di modellazione. Le analisi dinamiche dimostrano che gli effetti P-Δ possono fortemente influenzare la domanda sismica delle strutture prefabbricate in termini di duttilità in spostamento. Tuttavia, si dimostra che tale influenza può essere compensata dalla sovraresistenza strutturale. Nella parte finale di questo lavoro, si propone, quindi, una modifica alle prescrizioni normative al fine di giungere ad una progettazione sicura e più economica.
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Hybridization of Convergent Photogrammetry, Computer Vision, and Artificial Intelligence for Digital Documentation of Cultural Heritage - A Case Study: The Magdalena Palace
Digital documentation of cultural heritage is a very important issue that is receiving increasing attention from the scientific community. The availability of accurate 3D models of historical buildings is crucial to preserve our cultural heritage,...
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Digital documentation of cultural heritage is a very important issue that is receiving increasing attention from the scientific community. The availability of accurate 3D models of historical buildings is crucial to preserve our cultural heritage, because it allows us to reconstruct them in case of fortuitous collapse or intentional demolition or damage. In this paper, we present a new approach for the digital documentation of cultural heritage. Our approach is based on a hybridization of different techniques for data capture and processing and image analysis, with the aim of obtaining 3D models from images and the texturing of these models. In particular, we rely on convergent photogrammetry as way to acquire information about the real objects for generation of 3D models. We also apply computer vision and artificial intelligence techniques for further processing of all acquired data. As a result, we have developed a new way to obtain digital documentation of cultural heritage from data by using accurate reverse engineering techniques. Our methodology has been successfully applied to the digital documentation of a famous historical building in the city of Santander: the Royal Palace of Magdalena, the conference venue of this conference Cyberworlds' 2014.
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Innovative core material produced by infusion process using hemp fibres
This paper investigates the mechanical properties in term of compression, tensile, flexural and shear strength of a new hemp core based on woven fabric. The hemp core is manufactured by means an innovative vacuum infusion process in which the input...
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This paper investigates the mechanical properties in term of compression, tensile, flexural and shear strength of a new hemp core based on woven fabric. The hemp core is manufactured by means an innovative vacuum infusion process in which the input both of epoxy resin and of air was allowed. In addition, a comparison among this and others more known materials used as core in sandwich structures was carried out. The results showed that the core under investigation has higher mechanical properties, without shear and indentation failure during the tests on the respective sandwich structures.
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Wear behaviour of epoxy resin filled with hard powders
The development of high performance materials based on epoxy resin finds a growing number of applications in which high wear resistance is required. One major drawback in many of these applications is the relatively poor wear resistance of the epoxy...
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The development of high performance materials based on epoxy resin finds a growing number of applications in which high wear resistance is required. One major drawback in many of these applications is the relatively poor wear resistance of the epoxy resin. Therefore, in order to investigate on the possibility of increasing wear resistance of thermoset polymers filled with hard powders, sliding tests are carried out by means of a pin on disc apparatus. In particular, composite resins, constituted by an epoxy resin filled with different contents and sizes of Silicon Carbide powder, are analyzed; the wear resistance, in terms of volume loss, is measured for different abrasive counterfaces and loads.
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Formability and Surface Quality of Incrementally Formed Grade 1 Titanium Thin Sheets
The incremental forming of titanium alloy sheets combines the advantages of this advanced flexible manufacturing process, that allows to produce complex components without using dedicated tools, with the interesting properties of the material under...
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The incremental forming of titanium alloy sheets combines the advantages of this advanced flexible manufacturing process, that allows to produce complex components without using dedicated tools, with the interesting properties of the material under consideration. In this study, thin sheets of grade 1 titanium were incrementally formed to evaluate their formability and surface quality by varying the tool-sheet contact conditions. Experimental tests and surface analyses highlight dependence on the contact conditions of the surface quality rather than of the formability. Moreover, they emphasize that the tool-sheet contact conditions mainly affect the repeatability of the process due to the occurrence of galling.
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The importance of software's and weather file's choice in dynamic daylight simulations
The prediction of daylight availability in indoor environments is nowadays an extremely relevant topic in the design practice for many reasons: it affects the design of the electric lighting system and therefore the calculation of the related energy...
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The prediction of daylight availability in indoor environments is nowadays an extremely relevant topic in the design practice for many reasons: it affects the design of the electric lighting system and therefore the calculation of the related energy consumption; it also has an impact on evaluation of comfort. Dynamic daylight simulations are a helpful tool to predict daylight availability in indoor environments and consequently to evaluate the possible reduction in energy consumptions. However, there are different software packages that perform dynamic daylight simulations and they use different engines and calculation methods which may be a source of differences in the results. Moreover this type of analysis requires a weather data file of the building's location to be performed. Since there are many of them available, which are developed from historical sets of weather measurements using different methods, the use of one or another can affect the simulations' results. Therefore in this paper an example of the impact on dynamic daylight simulations' results of different weather data files (IWEC, Meteonorm, TRY and Satel- Light) and different software (Daysim and 3ds Max Design®) will be reported.
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Distributed Approximation Algorithm for Resource Clustering
International audience
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