Littérature scientifique sur le sujet « Costruzioni in muratura »
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Articles de revues sur le sujet "Costruzioni in muratura"
Olivito, Renato S., et Rosamaria Codispoti. « Natural Fiber Composites for Structural Strengthening of Constructions ». Key Engineering Materials 916 (7 avril 2022) : 66–73. http://dx.doi.org/10.4028/p-qg327p.
Texte intégralSuchecki, Zbigniew. « Wolnomularstwo w dokumentach Stolicy Apostolskiej i Kodeksie Prawa Kanonicznego, ze szczególnym uwzględnieniem dekretów Kongregacji Doktryny Wiary (1949-1983) ». Prawo Kanoniczne 41, no 3-4 (20 décembre 1998) : 133–86. http://dx.doi.org/10.21697/pk.1998.41.3-4.06.
Texte intégralBrogiolo, Gian Pietro. « L'archeologia dell'architettura in Italia nell'ultimo quinquennio (1997-2001) ». Arqueología de la Arquitectura, no 1 (30 décembre 2002) : 19. http://dx.doi.org/10.3989/arq.arqt.2002.3.
Texte intégralМингазов, Шамиль Рафхатович. « БУЛГАРСКИЕ РЫЦАРИ ЛАНГОБАРДСКОГО КОРОЛЕВСТВА ». Археология Евразийских степей, no 6 (20 décembre 2020) : 132–56. http://dx.doi.org/10.24852/2587-6112.2020.6.132.156.
Texte intégralThèses sur le sujet "Costruzioni in muratura"
De, Chiara Elena. « Volte e cupole in muratura : un approccio basato sull’equilibrio ». Doctoral thesis, Universita degli studi di Salerno, 2018. http://hdl.handle.net/10556/3056.
Texte intégralMasonry curved elements, such as arches, vaults and domes, are among the most widespread, and fascinating, world historical Architecture structural elements. Written historical records about the set of technical rules used to erect masonry structures, even the most complex of them, date to quite recent times, around a couple of century before scientific discoveries of Galilei and Newton. These recordings show that the rules to build masonry structures like Gothic Cathedrals or domes and the European Baroque stairs were pure proportion rules. In fact, compressive stress inside masonry are typically very low, compared to the material resistance, hence the analysis of a masonry structure can be reduced mainly to the detection of a flux of compression forces equilibrating the external forces. A reasonable theory, explaining the bases of this phenomenon in modern terms, is based upon the constrains defining the Heyman’s unilateral material (No-Tension) evoking the rule system and the methods used by the ancient master builders and integrating the masonry structures analyses in the well defined limit analysis framework. In his 1966 work, entitled ”The Stone Skeleton”, Heyman casts his deep knowledge of the emerging Plasticity Theory of the time. Heyman theory was adopted and successfully applied to arches and domes only recently. Two alternate approaches have been proposed in this context. The first is the so called “Thrust Network Analysis” (TNA), while the second is the “Thrust Surface Method” (TSM). This thesis focuses on the “Thrust Surface Method” application, specifically in the implementation of an algorithm able to produce compressive membrane stress states on surfaces inside the masonry, in equilibrium with assigned external loads. Thrust Surface Method is based essentially on the loads equilibrium on a membrane surfaces. Such S surface represents the unique support of an admissible stress (i.e. a compression stress balanced with the loads) contained inside the vault thickness to which the loads action is transmitted by the surrounding continuum (small traction stresses are also used in the process). The freedom of choice of the S surface provides a wide catalogue of possible states of admissible stresses, much wider of the one available for the arches (whose possible shapes are heavily constrained by the equilibrium), and represents the specificity of both TNA and TSM. In details, with the TSM, membrane balance under assigned loads is a statistically determined problem, being three both the unknown stress components and the equilibrium condition. For a assigned shape S the catalogue of the balanced stresses is determined, indeed, by the boundary conditions. The choice of the S shape, however, is not fully free, since the membrane stresses have to be purely compression stresses. This thesis has the main purpose to introduce a method for the automation of the research of an admissible stresses field for a vault of chosen shape. Such method is based on the iterative resolution of a determined problem where the variable role is taken alternately by the shape and the stress. The practical ability to implement such iterative procedure is based on the the formulation of the membrane equilibrium on a surface S according to the Pucher scheme. In his 1934 work, Pucher used primitive analytical methods and introduced as primary variables the so called “projected stress”, showing how to decouple the three S equilibrium equation in two equations for the S surface equilibrium (equations which are independent from the membrane geometry) and one equation for the S transversal equilibrium, where the S curvature determine the coefficients. The general solution of the two surface equations can be expressed as a F function representing the stress potential (Airy function), while the transversal equilibrium equation is reduced to a differential linear second order equation in F whose coefficients are represented by the f Hessian function describing S in a Monge parametric representation. Constrain on the material to be exclusively compressed imposes a subsequent constrains on the stress potential: F has to be concave, i.e. its Hessian has to be semi-defined negative. F function is restricted too by the condition that f values are contained, for each point, in the interval defined by the vault extrados and intrados. The proposed iterative procedure, starting from an assigned surface f° , is built on a optimization based strategy to create sequences of stress functions F°, F1, F2, .., Fn, f1, f2, .., fn, with the purpose to automatically obtain a stress function as concave as possible and a membrane surface as close as possible to the vault median surface. [edited by author]
XVI n.s.
Mazzai, Francesco <1982>. « Modelli semplificati per valutazione di vulnerabilità sismica di strutture in muratura ». Doctoral thesis, Alma Mater Studiorum - Università di Bologna, 2013. http://amsdottorato.unibo.it/5936/1/Mazzai_Francesco_tesi.pdf.
Texte intégralThe aim of the thesis was to investigate complex problem of seismic vulnerability of masonry arch bridge by using simplified models. After a description of construction materials used in building and the principals element of a masonry bridges, the study on the arch bridge located in the municipality of San Marcello Pistoiese is reported. Numerical model, that allows to describe the structural behaviour of the bridge under seismic action and to assess the carrying capacity of the bridge subjected to a transversal action, is shown. In second moment the construction of a scale model of the bridge is described, it was subjected destructive tests made to assess the carrying capacity of the bridge compared to a hypothetical seismic action. It tries to frame the issue in a theoretical model that refers to the analysis limit. It describes a kinematics collapse of the chassis which takes its inspiration from the crack of the masonry model. FEM numerical models are presented in order of increasing complexity, seeking to frame the mechanical behaviour of the prototype of the bridge. Three types of models are shown: the first is represented by a frame consisting of linear beam elements with bending resistance hinged at the ends. The second type consists of a reticular frame equivalent in roughly the trends of the bridge and is formed only of rod-free flexural behaviour. Finally, the third type tries to describe the entire model with three-dimensional elements.
Mazzai, Francesco <1982>. « Modelli semplificati per valutazione di vulnerabilità sismica di strutture in muratura ». Doctoral thesis, Alma Mater Studiorum - Università di Bologna, 2013. http://amsdottorato.unibo.it/5936/.
Texte intégralThe aim of the thesis was to investigate complex problem of seismic vulnerability of masonry arch bridge by using simplified models. After a description of construction materials used in building and the principals element of a masonry bridges, the study on the arch bridge located in the municipality of San Marcello Pistoiese is reported. Numerical model, that allows to describe the structural behaviour of the bridge under seismic action and to assess the carrying capacity of the bridge subjected to a transversal action, is shown. In second moment the construction of a scale model of the bridge is described, it was subjected destructive tests made to assess the carrying capacity of the bridge compared to a hypothetical seismic action. It tries to frame the issue in a theoretical model that refers to the analysis limit. It describes a kinematics collapse of the chassis which takes its inspiration from the crack of the masonry model. FEM numerical models are presented in order of increasing complexity, seeking to frame the mechanical behaviour of the prototype of the bridge. Three types of models are shown: the first is represented by a frame consisting of linear beam elements with bending resistance hinged at the ends. The second type consists of a reticular frame equivalent in roughly the trends of the bridge and is formed only of rod-free flexural behaviour. Finally, the third type tries to describe the entire model with three-dimensional elements.
Sabatino, Riccardo. « Analisi non lineare di pareti murarie sotto azioni orizzontali : modellazione a telaio equivalente ». Doctoral thesis, Universita degli studi di Salerno, 2011. http://hdl.handle.net/10556/152.
Texte intégralLo spiccato comportamento inelastico delle strutture in muratura rende inapplicabile l’utilizzo di modelli statici lineari, e per tale motivo, sia per scopi accademici che eminentemente pratici, la comunità scientifica è chiamata all’adozione di più complessi modelli strutturali. A ciò si aggiunge l’esigenza di specifiche procedure statiche non lineari (NSP) che discendono dall’applicazione dei concetti alla base di un approccio perfomance‐based dell’ingegneria sismica. Tali procedure generalmente richiedono il confronto della domanda sismica con la capacità dell’edificio, tipicamente espressa in termini di spostamenti. In questa logica, la scelta dei più corretti modelli strutturali è di fondamentale importanza: da un lato l’esigenza di una previsione accurata porta all’adozione di modelli agli elementi finiti (EF) molto complessi ma, d’altra parte, l’alto costo in termini di tempo e di capacità computazionali richieste dai modelli agli EF suggerisce l’adozione, specie nella pratica professionale, di modelli semplificati, quali ad esempio il modello a telaio equivalente. Il modello a telaio equivalente non è una novità nel panorama della modellazione di strutture in muratura, tuttavia le effettive potenzialità del metodo meritano ancora oggi un sostanziale approfondimento, soprattutto in ambito non lineare. Scopo del presente lavoro di tesi è stata la realizzazione del software FREMA (Equivalent FRamE Analysis of MAsonry Structures), efficace strumento per l’analisi statica non lineare di pareti in muratura. Nel lavoro in esame sono quindi analizzate dapprima le principali caratteristiche del modello proposto (approccio a plasticità diffusa, processo di carico in controllo di spostamento, utilizzo di una legge accurata momento‐curvatura per il problema flessionale dei maschi murari, innovativi modelli a flessione per le fasce di piano) e successivamente una esaustiva validazione del software viene realizzata attraverso confronti con risultati teorici (analisi accurate agli EF) e riscontri sperimentali disponibili in letteratura. [a cura dell'autore]
IX n.s.
SIMONI, MICHELE. « Vulnerabilità sismica, danneggiamento e proposte di intervento di edifici storici in muratura in Emilia Romagna ». Doctoral thesis, Università degli studi di Ferrara, 2016. http://hdl.handle.net/11392/2403406.
Texte intégralThe masonry structures are a very common and distinctive type among the Emilian historical construction and the earthquake of May 20th and 29th, 2012 highlighted their high vulnerability. Aim of the present thesis is the analysis of a series of existing masonry construction damaged by earthquake. Thus the seismic vulnerability of the masonry constructions is studied and deepened, based on an accurate damage assessment and analyses on finite element models of typical configurations, in terms of geometrical and constructive features. The cases study presented are: - Fornasini tower, located in Poggio Renatico [1]; - A masonry monumental construction named Prospettiva [2] [3] [4] [5]; - The cross vault in the main tower of Fortress located in San Felice sul Panaro [6], - Naselli Crispi, one of the most important Renaissance masonry buildings in the city of Ferrara. To simulate and interpret its seismic response, non linear numerical simulations are performed by using in an integrated way various modelling approaches. The seismic response of those are described in reference to their historical notes, the damage and their post seismic structural interventions. Particularly, great attention has been devoted to cross masonry vault for which several numerical simulation are performed varying constraint conditions, material properties, infill modeling and presence of FRP strips as reinforcement devices [7]. [1] Cattari S., Lagomarsino S., Milani G., Rossi M., Simoni M., Tralli A.: Non linear modelling of fornasini tower after the 2012 emilia earthquake (italy). - Mexico City : SACH 2014 - 9th international Conference on Structural Analysis of Historical Construction, 2014. [2] Chiozzi A., Malagù M., Tralli A., Cazzani A.: ArchNURBS: NURBS-Based Tool for the Structural Safety Assessment of Masonry Arches in MATLAB. - [s.l.] : J. Comput. Civ. Eng. 10.1061/(ASCE)CP.1943-5487.0000481 , 04015010., 2015. - Vol. 30. [3] Chiozzi A., Simoni M. and Tralli A. Base isolation of heavy non-structural monolithic object at the top of masonry monumental construction. - [s.l.] : Materials and Structures, 2015. [4] Chiozzi A., Simoni M. and Tralli A. Rocking and overturing prevention for non-structural monolithic objects under seismic excitations through base isolation: a case study in Ferrara (Italy). - Florence : 5th European Conference of civil Engineering, 2014. [5] Chiozzi A., Simoni M. and Tralli A. Safety assessment and base isolation of heavy non-structural monolithic object. - Guwahaiti-India : 12th International conference on vibration problems, 2015. [6] Cattari S. [et al.] Vulnerabilità delle Rocche e dei Castelli Emiliani Danneggiati dal Sisma del Maggio 2012: Abaco dei principali meccanismi di danno.. - [s.l.] : Castellum n°55, 2014. [7] Milani G., Simoni M. and Tralli A. Advanced numerical models for the analysis of masonry cross vaults: a case study in italy. - [s.l.] : Engineering Structures, 2014. - Vols. 76, pp. 339-358.
FABIANI, FRANCESCA MARIA. « Analisi statica delle volte a crociera in muratura ». Doctoral thesis, Università degli Studi di Roma "Tor Vergata", 2008. http://hdl.handle.net/2108/462.
Texte intégralIn this paper an analysis of the minimum thrust state in the cross vault has been presented. Minimum thrust condition has been analysed by the static and kinematics point of view, following static and kinematics approach by Como [6,7]. This study brings out static and kinematics formulation is closely connected to the stress and cracks map in the vault. Paticularly Sabouret cracks mentioned by different authors [11,15] has been analysed. A simple operative method to calculate the minimum thrust in the vault has been given. This procedure has been applied to evaluate the minimum vault thrust for the Tepidarium’s vault in the ancient Baths of Diocletian.
Teodosio, Giuseppe. « Tecnologia, modellazione meccanica e rinforzo strutturale con materiali innovativi di strutture curve in muratura ». Doctoral thesis, Universita degli studi di Salerno, 2017. http://hdl.handle.net/10556/2583.
Texte intégralParole chiave: Strutture in muratura, Algoritmo Genetico, Modello agli elementi finiti adattabile; Rinforzo, Materiali Compositi. Abstract: Gli edifici in muratura realizzati nei secoli scorsi costituiscono una parte significativa del patrimonio architettonico internazionale. Il progetto ottimale degli interventi di rinforzo di questi edifici rappresenta una priorità e richiede la valutazione del loro comportamento meccanico sotto carichi statici e dinamici. Sono disponibili in letteratura diversi modelli meccanici per lo studio di strutture murarie, basati sull'approccio in termini di analisi limite, come proposto da Heyman. Questi modelli non possono essere facilmente adottati nei codici FEM. In questo contesto, viene implementato algoritmo genetico (Genetic Algorithm; GA) accoppiato ad un software FEM commerciale nell’ambito di una modellazione elastico lineare di strutture curve mediante elementi shell a comportamento prevalentemente membranale. Il modello proposto ricerca, per una data volta in muratura, una superficie delle pressioni "sicura" all'interno di un dominio di progetto, riducendo al minimo il valore medio degli sforzi principali di trazione agenti sulla parte non rinforzata del materiale (funzione di fitness). Il dominio di progettazione coincide con il volume della volta, nel caso di elementi in muratura non rinforzati o con una zona esterna della volta in corrispondenza delle aree rinforzate, nel caso in cui siano stati applicati rinforzi in FRP o FRCM. La metodologia proposta consente di valutare la sicurezza strutturale della volta muraria e di definire un progetto ottimale dell’intervento di rinforzo. [a cura dell'autore]
Keywords: Masonry structures, Genetic algorithm, Adaptive finite element model, Strengthening, Composite materials Abstract. Masonry buildings realized in the last centuries are a significant part of the international architectural heritage. The optimal design of the retrofit interventions of these buildings represents a priority and requires the evaluation of their mechanical behavior under static and dynamic loads. Several mechanical models capable to study masonry structures are available in literature and are based on Heyman limit analysis approach. These models cannot be easily adopted within FEM codes. Within this context, a Genetic Algorithm is implemented within a refinement adaptive finite element model to computational mesh of shell surfaces. The proposed model researches a ‘safe’ thrust surface of a masonry vault within a design domain, by minimizing the mean value of the principal tensile stresses carried by the unreinforced portion of the material (fitness function). The design domain coincides with either the vault volume, in the case of unreinforced masonry members, or an external region of the vault in correspondence with the reinforced areas, in the case of the vault strengthened with either Fiber Reinforced Polymer or Fabric Reinforced Cementitious composites. The proposed methodology allows evaluating the structural safety of masonry vault and defining an optimal design of reinforcement pattern. [edited by author]
XV n.s. (XXIX)
Marani, Federica <1980>. « Il deperimento dei geomateriali da costruzione : implicazioni sulla capacità sismica residua di edifici in CA e muratura ordinaria ». Doctoral thesis, Alma Mater Studiorum - Università di Bologna, 2011. http://amsdottorato.unibo.it/3987/1/Marani_Federica_tesi.pdf.
Texte intégralMarani, Federica <1980>. « Il deperimento dei geomateriali da costruzione : implicazioni sulla capacità sismica residua di edifici in CA e muratura ordinaria ». Doctoral thesis, Alma Mater Studiorum - Università di Bologna, 2011. http://amsdottorato.unibo.it/3987/.
Texte intégralMonni, Francesco. « Materiali innovativi per il recupero strutturale del costruito storico : il basalto e l'idea delle cuciture continue per la muratura ». Doctoral thesis, Università Politecnica delle Marche, 2012. http://hdl.handle.net/11566/242066.
Texte intégralDue to technology evolution, a lot of innovative techniques are today available in constructions field for structural purposes. In particular, from the early nineties, composite materials, created through the union between fibres (usually carbon, glass or aramidic ones) and matrix (usually a resin) have been used in building industry. Previously composites were used only in several fields such as automotive, aviation industry and sporting equipment, where great stiffness and strength are required and cost is not a problem. Recently, innovative reinforcing fibres, like steel, and basalt ones, are emerging in FRP field. This work focuses on basalt fibre products. Basalt is a natural material that is found in volcanic rocks originated from frozen lava. Continuous basalt fibers are obtained by melting basalt and are characterized by high modulus, heat resistance, good resistance to chemical attack and they seem to be a good alternative to glass fibers. Continuous basalt fibers can be processed with classic textile transformation to obtain also ropes, unlike other kinds of reinforcing fibers. This work presents a physical, chemical and tensile characterization of BFRP rods and BF ropes, in particular ropes are evaluated to be used in masonry strengthening. From the awareness that one of the worst structural defects of an historic masonry wall is the lack of monolithic behavior, arise the idea of a strengthening technique able to connect the several masonry elements, stitching them. The proposed technique, based on the reinforcement and connection of masonry component using basalt fiber ropes, is able to change the failure mode of masonry wall, exploiting material properties, and it is able to impart to masonry monolithic behavior. Compared to traditional techniques, best advantages are represented by the fact that the application is very fast (and so cheap), the material used (basalt) presents an high compatibility with masonry (stone stitches stone) and the intervention is almost totally reversible. Moreover it is invisible and so respectful of masonry original aspect, it improves but not replaces original materials and, finally, it is fire and chemical resistant. To assess the effectiveness of proposed technique, laboratory test (on “three-leaf” masonry samples) and in situ test (on rubble stone masonry) have been performed, above all that also FEM analysis has been developed to better understand experimental results.
Livres sur le sujet "Costruzioni in muratura"
I tiranti in acciaio nel calcolo delle costruzioni in muratura. [Palermo] : Flaccovio Dario editore, 2014.
Trouver le texte intégralLe murature antiche : E i principi di forma, geometria, decorazione, costruzione, stabilità. Caltanissetta [Italy] : Lussografica, 2006.
Trouver le texte intégralMassoneria e unità d'Italia : La libera muratoria e la costruzione della nazione. Bologna : Il mulino, 2011.
Trouver le texte intégralConti, Fulvio, et Marco Novarino. Massoneria e unità d'Italia : La libera muratoria e la costruzione della nazione. Bologna : Il mulino, 2011.
Trouver le texte intégralPalandrani, Claudio. Scultura e muratoria : Il contributo massonico nel progetto iconografico per la costruzione della nuova Italia post-unitaria. Acireale : Tipheret, 2017.
Trouver le texte intégralActes de conférences sur le sujet "Costruzioni in muratura"
Gorgo, Letizia, et Gloria Riggi. « URBAN TRACES : revitalization strategies for abandoned villages. » Dans 24th ISUF 2017 - City and Territory in the Globalization Age. Valencia : Universitat Politècnica València, 2017. http://dx.doi.org/10.4995/isuf2017.2017.5938.
Texte intégralSalamone, Giancarlo. « Towards the contemporary city. Reading method of post-unification restructuring of Trastevere in Rome ». Dans 24th ISUF 2017 - City and Territory in the Globalization Age. Valencia : Universitat Politècnica València, 2017. http://dx.doi.org/10.4995/isuf2017.2017.6046.
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