Search results for "cost"

showing 10 items of 5421 documents

Boundary elements analysis of adhesively bonded piezoelectric active repair

2009

Abstract This paper presents the analysis of active piezoelectric patches for cracked structures by the boundary element method. A two-dimensional boundary integral formulation based on the multidomain technique is used to model cracks and to assemble the multi-layered piezoelectric patches to the host damaged structures. The fracture mechanics behavior of the repaired structures is analyzed for both perfect and imperfect interface between patches and host beams. The imperfect interface, representing the adhesive between two different layers, is modeled by using a “spring model” that involves linear relationships between the interface tractions, in normal and tangential directions, and the …

CantileverMaterials scienceFissurePiezoelectric sensorbusiness.industryMechanical EngineeringDomain decomposition methodsFracture mechanicsStructural engineeringPiezoelectric materialPiezoelectricityImperfect bondingmedicine.anatomical_structureDiscontinuity (geotechnical engineering)Mechanics of MaterialsActive repairmedicineGeneral Materials ScienceBoundary Element analysiSettore ING-IND/04 - Costruzioni E Strutture AerospazialibusinessBoundary element methodEngineering Fracture Mechanics
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Il principio di gerarchia delle resistenze capacity design

2012

The devastating effects generated by earthquakes occurred in different parts of the world have attract at a major interest in Earthquake Engineering. This branch of Structural Engineering studies the response and capacity of structural systems subjected to seismic actions, and develops design and prediction methods aimed at achieving adequate safety standards in presence of seismic events. A strategy used for the seismic prediction of RC structures, based on the capacity design of structural elements is the "hierarchy of strengths" (HS) principle. The paper shows how a proper use of the HS capacity design method can be included within the seismic design of RC structures achieving high level…

Capacity Design Duttilità Cerniere Plastiche Dissipazione di Energia.Settore ICAR/08 - Scienza Delle Costruzioni
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A novel thermoeconomic analysis under dynamic operating conditions for space heating and cooling systems

2019

Abstract Thermoeconomic analysis allows for a deep understanding of the cost formation process within an energy system, providing insights into the possible routes for improvement. Several thermoeconomic approaches are well-established for application in systems with steady operating conditions, such as power plants, while a limited number of applications to air-conditioning systems in buildings have been proposed, due to the difficulties in dealing with very irregular load profiles and unsteady plant operating conditions. This study investigates the potential of Thermoeconomics as a support for decision making in building energy systems, proving its capability to identify trade-offs betwee…

Capital investmentComputer science020209 energyThermoeconomics02 engineering and technologySpace (commercial competition)Industrial and Manufacturing Engineering020401 chemical engineering0202 electrical engineering electronic engineering information engineeringSettore ING-IND/10 - Fisica Tecnica Industriale0204 chemical engineeringElectrical and Electronic EngineeringProcess engineeringCivil and Structural Engineeringbusiness.industryMechanical EngineeringProcess (computing)Building energyBuilding and ConstructionPollutionPower (physics)Dynamic simulationGeneral EnergyHVAC performance Buildings Dynamic thermoeconomic analysis Irreversibilities Exergoeconomic costsbusinessEnergy (signal processing)
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Evaluación de las tarifas de las pensiones de accidentes de trabajo y enfermedades profesionales (2011-2015)

2017

Este trabajo analiza si las tarifas que se aplican para la determinación del denominado capital coste de pensiones derivadas de los accidentes de trabajo y enfermedades profesionales son las adecuadas. A partir de los datos de la Muestra Continua de Vidas Laborales y de la evolución de la longevidad de la población general en España, se estiman tablas de mortalidad para las contingencias de viudedad e invalidez que, combinadas con los parámetros económicos y financieros apropiados, permiten construir las bases técnicas actuarialmente justas para cada uno de los años objeto de análisis. Los resultados obtenidos sugieren que las tarifas aplicadas en el periodo 2011- 2014 han sido muy superior…

CapitalizationPublic AdministrationSociology and Political Sciencerentas vitaliciasStrategy and ManagementSample (statistics)lcsh:Businessviudedad01 natural sciencesinvalidezmutuas de accidentes de trabajolcsh:Social Sciences010104 statistics & probabilityPensionsMutual Funds for work accidentsAccounting0502 economics and business3 Ciencias sociales / Social sciencesMalalties professionalsEconomicsCapital costwidowhoodannuities050207 economics0101 mathematicsRisk assessmentMarketinglcsh:CommerceWelfare economics05 social sciencesReview procedureIndustrial accidentscapitalizaciónTreasurySocial securitySpanish populationlcsh:Hlcsh:HF1-6182disabilityLife tableCovertOccupational diseasesAvaluació del riscAccidents de treballlcsh:HF5001-6182Innovar: Revista de Ciencias Administrativas y Sociales
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Caracciolo ed il superamento del piano funzionalista

2014

Viene esaminato il contributo di Edoardo Caracciolo al superamento del piano funzionalista di matrice razionalista, attraverso l'esame dei piani da lui redatti per Caltanissetta, Trapani e Marsala

Caracciolo piano funzionalista Piani di ricostruzioneSettore ICAR/21 - Urbanistica
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ANALISI DEL COMPORTAMENTO MECCANICO DI SANDWICHES GREEN COSTITUITI DA PELLI IN BIOCOMPOSITO E CORE IN BALSA/SUGHERO

2022

Negli ultimi anni l’aumento della sensibilità nei confronti della salvaguardia ambientale, anche attraverso apposite norme in materia di lotta all’inquinamento e di riciclo dei materiali a fine vita, ha portato ad un notevole interesse dei ricercatori verso i cosiddetti compositi green, materiali costituiti in genere da rinforzi di origine naturale e matrici “bio-based” a basso impatto ambientale. Una categoria interessante di materiali innovativi, caratterizzati da una elevata resistenza a flessione unita ad un basso peso specifico, è rappresentata dai cosiddetti sandwiches, costituiti in genere da robuste pelli in composito fibro-rinforzato e da un core in materiale molto leggero e poco r…

Caratteristiche meccanicheSettore ING-IND/14 - Progettazione Meccanica E Costruzione Di MacchineSandwicheBiocompositisisal
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Analisi Sperimentale del Comportamento Ciclico di Elementi in Calcestruzzo a Bassa Resistenza Confinati con FRCM

2013

Vengono riportati i principali risultati di una campagna sperimentale finalizzata alla caratterizzazione della risposta sotto carichi assiali ciclici di colonne di calcestruzzo a bassa resistenza con sezione circolare, quadrata e rettangolare, rinforzate con fibre di carbonio immerse in matrice cementizia (CFRCM). Sono state condotte prove di compressione assiale su 30 campioni di altezza 600 mm, 10 a sezione cilindrica di diametro 300 mm, 10 quadrata di lato 200 mm, e 10 rettangolare di lato 200x400 mm. Le prove sono finalizzate a indagare gli effetti del carico ciclico, della forma della sezione, del raggio di curvatura degli spigoli e del numero di strati di tessuto di rinforzo sul legam…

Carbon Fiber Cementitious Matrix Cyclic actions Confinement Experimental testsSettore ICAR/09 - Tecnica Delle CostruzioniSperimentazioneCarbon FiberCalcestruzzo confinatoCyclic actionsFRCMExperimental testsCompressione centrataCarbon Fiber; Cementitious Matrix; Cyclic actions; Confinement; Experimental testsCementitious MatrixConfinement
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TENACITÀ ALLA FRATTURA INTERLAMINARE DI COMPOSITI CFRP SOTTOPOSTI A PROCESSI DI INVECCHIAMENTO IDROTERMICO

2011

In questo lavoro si è condotto uno studio degli effetti dell’invecchiamento idrotermico sulla tenacità alla frattura interlaminare in Modo I di laminati in composito CFRP con lay-up unidirezionale. I pannelli realizzati impiegano una resina epossidica DGEBA. Provini DCB sono stati ricavati in accordo con la norma ASTM D5528. Prove dinamico meccaniche DMTA sono state condotte per analizzare l’influenza dell’invecchiamento sulla temperatura di transizione vetrosa, e quindi sul grado di fragilità della matrice. Il lavoro descrive il set-up sperimentale per la determinazione delle Curve R, evidenziando l’influenza della morfologia del tessuto in carbonio. I valori di GIC di innesco e di propaga…

Carbon Fibre Reinforced Plastics (CFRP) Invecchiamento Idrotermico Tenacità alla Frattura Interlaminare Double Cantilever Beam (DCB).Settore ING-IND/14 - Progettazione Meccanica E Costruzione Di MacchineSettore CHIM/07 - Fondamenti Chimici Delle Tecnologie
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Analysis of the mechanical performance of hybrid (SPR/bonded) single-lap joints between CFRP panels and aluminum blanks

2013

Abstract The increasing use of innovative materials in manufacturing of modern mechanical components has led to the development of reliable joints between innovative (composite materials etc.) and traditional materials (steel, aluminum etc.). In the last few years, hybrid joints, combining the advantages of the adhesive joints and traditional mechanical joints as bolted or riveted joints, have been shown an increasing industrial interest especially in automotive and aerospace sectors. In the present paper a systematic experimental study of hybrid lap joints was carried out with the aim to detect the optimal joint configuration. Tensile tests on hybrid joints made by combining adhesive bondi…

Carbon fiber reinforced polymerMaterials sciencePolymers and PlasticsAdhesive bondingbusiness.industryGeneral Chemical EngineeringHybrid jointStructural engineeringbondingBiomaterialsSettore ING-IND/14 - Progettazione Meccanica E Costruzione Di MacchineLap jointMechanical jointUltimate tensile strengthRivetself piercing rivetingAdhesiveComposite materialbusinessSettore ING-IND/16 - Tecnologie E Sistemi Di LavorazioneJoint (geology)International Journal of Adhesion and Adhesives
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Experimental investigation on the compressive behavior of short-term preloaded carbon fiber reinforced polymer-confined concrete columns

2017

Strengthening of concrete columns with fiber reinforced polymer sheets provides a good improvement to the existing structural members in terms of load and strain capacity due to the properties of the composite jacket. A proper knowledge of the load–strain response of the composite members is necessary to design retrofitting intervention of existing structures; however, so far the available design methods do not allow to take into account the effect of the possible presence of service loads on the compressive behavior of the reinforced columns. An experimental investigation on the compressive behavior of preloaded circular concrete columns reinforced with carbon fiber reinforced polymer was …

Carbon fiber reinforced polymerMaterials scienceconfined concretebusiness.industry0211 other engineering and technologies020101 civil engineering02 engineering and technologyBuilding and ConstructionStructural engineering0201 civil engineeringTerm (time)axial capacitySettore ICAR/09 - Tecnica Delle CostruzioniMechanics of Materialsconfinement021105 building & constructionGeneral Materials Sciencebusinessfiber reinforced polymer (FRP)preloadingconfinement lateral pressureCivil and Structural Engineering
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