Дисертації з теми "Numerical evaluation of structural response"
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Hahn, Steven R. "An evaluation of acoustic response to structural modification." Diss., Georgia Institute of Technology, 2000. http://hdl.handle.net/1853/17023.
Повний текст джерелаTerro, Mohamad Jamil. "Numerical modelling thermal and structural response of reinforced concrete structures in fire." Thesis, Imperial College London, 1991. http://hdl.handle.net/10044/1/7558.
Повний текст джерелаKromanis, Rolands. "Structural performance evaluation of bridges : characterizing and integrating thermal response." Thesis, University of Exeter, 2015. http://hdl.handle.net/10871/17440.
Повний текст джерелаKoyyapu, Naresh Kumar. "Numerical Computation of Transient Response of 2D Wedge Impact." ScholarWorks@UNO, 2016. http://scholarworks.uno.edu/td/2260.
Повний текст джерелаShahrokh, Esfahani Marjan, and Hamedani Rasoul Nilforoush. "Numerical Evaluation of Structural Behavior of the Simply Supported FRP-RC Beams." Thesis, KTH, Betongbyggnad, 2012. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-100876.
Повний текст джерелаDet största problemet med stålarmerade betongkonstruktioner är korrosion av stålarmeringen vilket leder till tidiga skador i betongkonstruktionen. Årligen åtgår stora summor till reparation och ombyggnad av konstruktioner som drabbas av detta problem. För att förbättra den långsiktiga prestandan hos armerade betongkonstruktioner, och för att förhindra korrosionsproblemet, kan konventionella stålstänger ersättas av FRP-stänger (fiberarmerade polymerkompositer) för armering av betongkonstruktioner. Detta arbete är en numerisk undersökning för att uppskatta det strukturella beteendet av fritt upplagda betongbalkar, förstärkta med FRP-stänger i jämförelse med stålarmerade betongbalkar. Det kommersiella finita element modelleringsprogrammet ABAQUS, har använts för detta ändamål. Även programmets förmåga när det gäller att modellera icke-linjära beteenden av betongmaterial har undersökts. För att uppskatta det strukturella beteendet av FRP-armerade betongbalkar har hänsyn tagits till två olika aspekter, effekten av olika armeringstyper och deras proportioner samt effekten av olika betongkvaliteter. I det första fallet har olika armeringstyper och deras proportioner, fyra typer av armeringsstänger; CFRP, GFRP, AFRP och stål betraktats. Dessutom antas att betongen har normal hållfasthet. För att kontrollera resultatet av modelleringen, har i detta fall räkneexemplen baserats på experimentella studier utförda av Kassem et al. (2011). I det andra fallet har antagits att alla modeller innehåller höghållfast betong (HSC) och även de mekaniska egenskaperna hos betongmaterialet bygger i detta fall på en experimentell studie utförd av Hallgren (1996). För att jämföra resultatet av HSC- och NSC-modeller, är armeringens mekaniska egenskaper de samma som används för det andra fallet. Vidare har en detaljerad undersökning av betongmaterialets icke-linjära beteende och FE-modellering av armerade betongkonstruktioner presenterats. Resultaten av modelleringen har presenterats i form av; kurvor för sambandet mellan moment och mittspannets nedböjning, krympning i betongens översida, förlängningen av den lägre dragarmeringen, sprickmoment och maximalt moment, service- och maximal nedböjning, formfaktor samt typ av brott. Slutligen har resultaten från modellberäkningar jämförts med förutsägelser baserade på flera regler och standarder såsom; ACI 440-H, CSA S806-02 och ISIS Canada Model.
Arslan, Hakan. "A Numerical Study On Response Factors For Steel Wall-frame Systems." Master's thesis, METU, 2009. http://etd.lib.metu.edu.tr/upload/2/12610811/index.pdf.
Повний текст джерелаKurban, Can Ozan. "A Numerical Study On Response Factors For Steel Plate Shear Wall Systems." Master's thesis, METU, 2009. http://etd.lib.metu.edu.tr/upload/12610741/index.pdf.
Повний текст джерелаJamil, A. "Structural response of novel PU structures under quasi-static, impact and blast loading : experimental and numerical analyses." Thesis, University of Liverpool, 2017. http://livrepository.liverpool.ac.uk/3018626/.
Повний текст джерелаHur, Jieun. "Seismic performance evaluation of switchboard cabinets using nonlinear numerical models." Diss., Georgia Institute of Technology, 2012. http://hdl.handle.net/1853/45813.
Повний текст джерелаLuboya, Silhady Tshitende. "Response of Footbridges equipped with TLD : A numerical and experimental assessment." Thesis, KTH, Bro- och stålbyggnad, 2020. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-278563.
Повний текст джерелаFinozzi, Irene Barbara Nina Verfasser], and Harald [Akademischer Betreuer] [Budelmann. "Structural response of corrosion damaged RC members: numerical analyses and experimental investigation / Irene Barbara Nina Finozzi ; Betreuer: Harald Budelmann." Braunschweig : Technische Universität Braunschweig, 2017. http://d-nb.info/1175818283/34.
Повний текст джерелаAwang, Draup Awang Jefri. "Numerical simulation of the structural response of friction stir welded aluminium 2139-T8 alloy subjected to complex loading configurations." Thesis, University of Manchester, 2017. https://www.research.manchester.ac.uk/portal/en/theses/numerical-simulation-of-the-structural-response-of-friction-stir-welded-aluminium-2139t8-alloy-subjected-to-complex-loading-configurations(a840bd28-102d-4c15-be6c-b4e72631e875).html.
Повний текст джерелаSALVI, Jonathan. "Optimisation of Tuned Mass Damper Devices Towards Structural Vibration Reduction: Theoretical Settings and Numerical Analyses." Doctoral thesis, Università degli studi di Bergamo, 2014. http://hdl.handle.net/10446/224063.
Повний текст джерелаOruganti, Krishna, and krishnaov@yahoo com. "Evaluation of Damage in Structures using Vibration-based Analyses." RMIT University. Aerospace, Mechanical and Manufacturing Engineering, 2009. http://adt.lib.rmit.edu.au/adt/public/adt-VIT20091002.143408.
Повний текст джерелаVan, Deventer Megan. "The development and empirical evaluation of an work engagement structural model." Thesis, Stellenbosch : Stellenbosch University, 2015. http://hdl.handle.net/10019.1/96784.
Повний текст джерелаENGLISH ABSTRACT: Work Engagement is one construct of many that forms part of the complex nomological network of constructs underlying the behaviour of working man2. Work Engagement is an important construct both from an individual as well as from an organisational perspective. Human resource management interventions aimed at enhancing Work Engagement aspire to contribute to the achievement of the organisation’s primary objective and the well-being of the organisation’s employees. Such interventions will most likely also be valued by individuals within the workplace, as individuals will be able to experience a sense of personal fulfilment through self-expression at work. It is therefore essential to gain a valid understanding of the Work Engagement construct and the psychological mechanism that underpins it, in order to design human resource interventions that will successfully enhance Work Engagement. The current study raises the question why variance in Work Engagement exists amongst different employees working in different organisational contexts. The research objective of the current study is to develop and empirically test an explanatory Work Engagement structural model that will provide a valid answer to this question. In this study, a comprehensive Work Engagement structural model was proposed. An ex post facto correlational design with structural equation modelling (SEM) as the statistical analysis technique was used to test the substantive research hypotheses as represented by the Work Engagement structural model. Furthermore, the current study tested two additional narrow-focus structural models describing the impact of value congruence on Work Engagement by using an ex post facto correlational design with polynomial regression as the statistical analysis technique. A convenience sample of 227 teachers working in public sector schools falling under the jurisdiction of the Western Cape Education Department (WCED) participated in the study. The comprehensive Work Engagement model achieved reasonable close fit. Support was found for all of the hypothesised theoretical relationships in the Work Engagement structural model, except for the influence of the PsyCap*Job Characteristics interaction effect on Meaningfulness and for three of the five latent polynomial regression terms added in the model in an attempt to derive response surface test values. The response surface analyses findings were mixed. Based on the obtained results, meaningful practical recommendations were derived.
AFRIKAANSE OPSOMMING: Werkverbintenis1 is een van ‘n groot verskeidenheid konstrukte wat deel vorm van die komplekse nomologiese netwerk van konstrukte wat die gedrag van die arbeidende mens onderlê. Werkverbintenis word as ‘n belangrike konstruk beskou vanuit ‘n individuele sowel as vanuit ‘n organisatoriese perspektief. Menslike hulpbronbestuurs-intervensies gerig op die bevordering van Werkverbintenis streef daarna om by te dra tot die bereiking van die organisasie se primêre doel sowel as tot die welstand van die organisasie se werknemers. Sodanige intervensies sal waarskynlik ook deur werknemers waardeer word, aangesien sodanige intervensies die kanse verhoog dat individue selfvervulling in hul werk sal ervaar omdat die werk hul die geleentheid bied om hulself in hul werk uit te leef. Dit is gevolglik noodsaaklik om ‘n geldige begrip te ontwikkel van die Werkverbintenis-konstruk en die sielkundige meganisme wat dit onderlê ten einde menslike hulpronbestuurs-intervensies te ontwerp wat suksesvol Werkverbintenis sal bevorder. Die huidige studie stel die vraag aan die orde waarom variansie in Werkverbintenis tussen verskillende werknemers bestaan wat in verskillende organisatoriese kontekste werk. Die navorsingsdoelstelling van die huidige studie is om ‘n verklarende Werkverbintenisstrukturele model te ontwikkel en te toets wat ‘n geldige antwoord op hierdie vraag sal bied. ‘n Omvattende Werkverbintenis strukturele model is in hierdie studie voorgestel. ‘n Ex post facto korrelatiewe ontwerp met strukturele vergelykingsmodellering (SVM) as die statistiese ontledingstegniek is gebruik om die substantiewe navorsingshipotese soos voorgestel deur die Werkverbintenis strukturele model te toets. Die huidige studie het voorts twee addisionele nouer-fokus strukturele modelle getoets wat die impak van waardekongruensie op Werkverbintenis beskryf deur middel van ‘n ex post facto korrelatiewe ontwerp met polinomiese regressie-ontleding as statistiese ontledingstegniek. ‘n Geriefsteekproef van 227 onderwysers wat in openbare skole werksaam is wat onder die beheer van die Wes Kaapse Department van Onderwys val (WKDO) het aan die studie deelgeneem. Die omvattende Werkverbintenis-model het redelik goeie pasgehalte getoon. Steun is gevind vir all die voorgestelde teoretiese verwantskappe in die Werkverbintenis strukturele model, behalwe vir die invloed van die Sielkundige kapitaal*Werk eienskappe-interaksie-effek op Betekenisvolheid en vir drie van die vyf polinomiese latente regressie-terme wat in die model ingesluit is in ‘n poging om responsoppervlakte-waardes af te lei. Gemengde resultate is verkry vir die responsoppervlakte-ontleding. Betekenisvolle praktiese aanbevelings is gemaak op grond van die navorsingsresultate.
Bakir, Serhan. "Evaluation Of Seismic Response Modification Factors For Steel Frames By Non-linear Analysis." Master's thesis, METU, 2006. http://etd.lib.metu.edu.tr/upload/12607827/index.pdf.
Повний текст джерелаR&rdquo
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FIERRO, Tony. "Implementation and use of advanced constitutive models in numerical codes for the evaluation of the soil response under seismic loadings." Doctoral thesis, Università degli studi del Molise, 2022. https://hdl.handle.net/11695/115267.
Повний текст джерелаThe prediction of soil behaviour when seismic loads are applied is a challenging task to be achieved in Geotechnical Earthquake Engineering. However, when dynamic loadings are involved, low-to-high strain levels are reached. In this context, a key role is played by the numerical modelling, and different features are required to make it reliable: the soil should be modelled exploiting a solid constitutive framework, a widely tested software platform should be adopted, and the geometry of the problem under analysis should be correctly defined. On these premises, the thesis focuses on the implementation and use of advanced constitutive models in an open-source numerical platform, namely OpenSees, to show their applicability to practical cases. Different scenarios mobilizing small-to-high strain levels are considered and an increasing complexity of the geometry of the problem is analyzed. Firstly, the most adopted constitutive models able to simulate granular soils behaviour under undrained conditions are reviewed; here, it emerged that SANISAND and PM4SAND only are available in OpenSees, while the NTUASand02 model has never been implemented in a finite element code to perform fully-coupled site response analysis. For this reason, the model has been added to the OpenSees framework, and the whole procedure to implement and validate the implementation is shown in detail. Drained and undrained, monotonic and cyclic, triaxial and direct simple shear tests have been performed to compare the elemental response obtained in OpenSees to that resulting from the original implementation. Furthermore, different integration schemes have been tested and the modulus reduction curve of Nevada sand has been simulated. Then, the three constitutive models (SANISAND, PM4SAND, NTUASand02) have been tested in the simulation of the response of a 20-m thick column of Nevada sand. The comparison between the resulting responses has revealed satisfactory, especially under drained conditions and under undrained conditions at low-strain levels. When the shaking amplitude increases, soil liquefaction strongly affects the responses. Then, two free-field centrifuge tests performed in the framework of LIQUEFACT project on Ticino Sand has been simulated. The centerline of the centrifuge box has been modelled at the prototype scale and the soil non-linearity has been accounted for using PM4SAND. The results of the simulations highlighted that the acceleration time-series are correctly reproduced, while the excess pore water pressure time series are overestimated. Finally, the paradigmatic case of the San Giuliano di Puglia basin is modelled exploiting the valuable computational capabilities of the single processor parallel interpreter OpenSeesSP on the DesignSafe-CI. In particular, in 2002, the Molise Earthquake caused the death of 27 children and a teacher in the newly built area of the town, while the historical core experienced limited damage. For this reason, the whole valley has been modelled in OpenSeesSP exploiting the most recent geotechnical data and the monitoring system installed in the town has been used as benchmark to validate the numerical model. The soil behaviour is modelled using the pressure-independent multi-yield constitutive model. Generally, a good agreement has been highlighted in the time domain by comparing recorded and simulated data, while the amplification factor profile is consistent to the damage distribution observed after the 2002 earthquake.
Wei, Min. "A Structural and Psychometric Evaluation of a Situational Judgment Test: The Workplace Skills Survey." Thesis, University of North Texas, 2014. https://digital.library.unt.edu/ark:/67531/metadc799488/.
Повний текст джерелаMutlu, Mehmet Basar. "Numerical Simulations Of Reinforced Concrete Frames Tested Using Pseudo-dynamic Method." Master's thesis, METU, 2012. http://etd.lib.metu.edu.tr/upload/12614460/index.pdf.
Повний текст джерелаMontalban, Laura. "Evaluation of a Contactless Excitation and Response System (CERS) for process planning applications : An experimental study." Thesis, KTH, Industriell produktion, 2016. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-192679.
Повний текст джерелаChatter är ett vanligt problem inom tillverkningsindustrin som begränsar produktiviteten och minskar noggrannheten och kvalitén på bearbetade ytor. Denna studie fokuserar på processkilda metoder, till exempel stabilitetsdiagram (SLD), vilka säkerställer valet av optimala skärparametrar för en stabil skärprocess. Tidigare studier har visat att spindelns dynamiska egenskaper är beroende av rotationshastigheten. Detta påverkar även noggrannheten vid skattningen av SLD eftersom traditionella strukturdynamiska tester, som experimentell modalanalys (EMA), utförs under statiskt tillstånd. En alternativ metod för bestämning av hastighetsberoende SLD med hjälp av ett beröringsfritt excitering- och svarssystem (CERS) föreslås. De modala egenskaperna, som till exempel egenfrekvens och dämpning, bestämdes med hjälp av EMA med stillastående spindel medan mätningar med CERS utfördes med ökad rotationshastighet upp till 14000 varv/min. Efter detta beräknades SLD för de båda fallen. Till sist drogs slutsatsen att testerna inte påvisade någon större skillnad, vare sig dynamiska egenskaper eller SLD skattning, för spindelhastigheter inom det testade intervallet (0 till 14000 varv/min).
Hernandez, Jaime A. "Evaluation of the Response of Perpetual Pavement at Accelerated Pavement Loading Facility: Finite Element Analysis and Experimental Investigation." Ohio University / OhioLINK, 2010. http://rave.ohiolink.edu/etdc/view?acc_num=ohiou1281705838.
Повний текст джерелаHoskins, Matt C. "Structural-Symbolic Translation Fluency: Reliability, Validity, and Usability." Digital Commons @ East Tennessee State University, 2016. https://dc.etsu.edu/etd/3012.
Повний текст джерелаSingh, Gurjashan. "Health Monitoring of Round Objects using Multiple Structural Health Monitoring Techniques." FIU Digital Commons, 2010. http://digitalcommons.fiu.edu/etd/330.
Повний текст джерелаSlein, Ryan Michael. "Evaluation of Strength Reduction Factor for Concentrically Braced Frames Based on Nonlinear Single Degree-of-Freedom Systems." DigitalCommons@CalPoly, 2016. https://digitalcommons.calpoly.edu/theses/1532.
Повний текст джерелаSiruvole, Sandeep Kumar Lankarani Hamid M. "Evaluation of the occupant response and structural damage according to the newly proposed pole test under Federal Motor Vehicle Safety Standard side impact regulation." Diss., A link to full text of this thesis in SOAR, 2007. http://soar.wichita.edu/dspace/handle/10057/1173.
Повний текст джерела"May 2007." Title from PDF title page (viewed on Dec. 29, 2007). Thesis adviser: Hamid M. Lankarani. Includes bibliographic references (leaves 60-62).
Piccioni, Flavio. "Numerical Evaluation of Mode II Disbonding on Fiberglass CCPs-Specimens and Material Characterization Utilizing a Distributed Sensing Rayleigh Backscattering System." Master's thesis, Alma Mater Studiorum - Università di Bologna, 2020. http://amslaurea.unibo.it/19848/.
Повний текст джерелаElgazzar, Hesham. "End-Shield Bridges for High-Speed Railway : Full scale dynamic testing and numerical simulations." Licentiate thesis, KTH, Bro- och stålbyggnad, 2017. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-204774.
Повний текст джерелаQC 20170403
Hansell, Markus, and Panagiotis Tamtakos. "Dynamic analyses of hollow core slabs : Experimental and numerical analyses of an existing floor." Thesis, KTH, Bro- och stålbyggnad, 2020. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-278539.
Повний текст джерелаHåldäck i betong används idag i stor utsträckning som bjälklag i bostads- och kontorsbyggnader, liksom i parkeringsgarage och köpcentra. Håldäcksbjälklag består av prefabricerade och förspända betongelement, med cylindriska hål som sträcker sig i plattans längsriktning. Dessa konstruktionselement har fördelen, jämfört med platsgjutna betongplattor, att de har en hög hållfasthet på grund av förspänningen och att hålen möjliggör en lägre egenvikt. Dessutom gör hålen att en mindre mängd betongmaterial behövs. Dessa egenskaper ger möjligheter att bygga golv med långa spännvidder och slank design. En konsekvens av slankheten är emellertid att sådana golv har en ökad känslighet för vibrationer som orsakas av olika dynamiska belastningar. I bostads- och kontorsbyggnader orsakas vibrationer främst av mänsklig aktivitet, och därför finns det en del oro relaterad till sådana golvs brukbarhet. Dessa vibrationer är oftast inte relaterade till frågor om strukturell integritet, utan snarare till olika aspekter av boendes eller arbetares känsla av komfort. Syftet med detta examensarbete är att bidra till kunskapen om håldäcksbjälklags dynamiska beteende. En experimentell modalanalys har utförts på ett befintligt golv i en kontorsbyggnad. De dynamiska egenskaperna i form av egenfrekvenser, modformer, dämpning och frekvenssvarsfunktioner erhölls och analyserades med hjälp av dessa mätningar. Därefter utvecklades flera finita element modeller för att reproducera det experimentellt uppmätta dynamiska beteendet hos det studerade golvet. Mätningarna visade initialt något oväntade dynamiska responser från golvet. Av denna anledning applicerades mer avancerade signalanalysmetoder på datan. Analyserna visade att plattan har några moder inom ett litet frekvensintervall och att moderna till en viss grad är komplexa. De finita element modellerna studerades med olika konfigurationer. I synnerhet studerades effekten av modellstorleken, randvillkoren, materialegenskaperna och potentiella strukturella diskontinuiteter på golvets dynamiska respons. Tillräckligt bra överensstämmelse har uppnåtts mellan de experimentella och numeriska resultaten i form av egenfrekvenser och modformer. Accelerationsamplituderna för de numeriska modellerna var i allmänhet högre än de som erhölls under mätningarna, vilket leder till svårigheter att matcha frekvenssvarsfunktionerna.
Kalluru, Mallikarjun. "One-way Coupled Hydroelastic Analysis of Aluminum Wedge Under Slamming." ScholarWorks@UNO, 2017. https://scholarworks.uno.edu/td/2414.
Повний текст джерелаBredesen, Michael H. "The Simulation & Evaluation of Surge Hazard Using a Response Surface Method in the New York Bight." UNF Digital Commons, 2015. http://digitalcommons.unf.edu/etd/568.
Повний текст джерелаLiu, Albert Darien. "THE EFFECT OF SENSOR MASS, SENSOR LOCATION, AND DELAMINATION LOCATION OF DIFFERENT COMPOSITE STRUCTURES UNDER DYNAMIC LOADING." DigitalCommons@CalPoly, 2013. https://digitalcommons.calpoly.edu/theses/917.
Повний текст джерелаDJILALI, BERKANE LAIEB ZOHRA. "Evaluation numérique d'un coefficient de sécurité cinématique pour les barrages et les ouvrages en terre." Université Joseph Fourier (Grenoble), 1997. http://www.theses.fr/1997GRE10193.
Повний текст джерелаFiorin, Laura. "Seismic assessment of suspended ceilings through cyclic quasi-static tests." Doctoral thesis, Università degli studi di Padova, 2018. http://hdl.handle.net/11577/3423162.
Повний текст джерелаLo scopo della tesi è la valutazione del comportamento sismico di controsoffitti, tramite prove cicliche quasi statiche. La tipologia di prove più comune ad oggi, infatti, riguarda prove su tavole vibrante con un protocollo definito per certificare il prodotto per una certa azione sismica. Queste prove presentano varie limitazioni, tra cui il costo elevato e la stretta correlazione tra risultato e input scelto. Le prove infatti non hanno specifico scopo di ricerca se non l’obiettivo di certificare un prodotto, non forniscono informazioni sulle prestazioni meccaniche dei componenti testati e non permettono di estendere i risultati ottenuti ne su prodotti simili ne in zone geografiche con diverso rischio sismico. È stato quindi progettato un setup di prova innovativo in grado di realizzare prove monotone e cicliche quasi statiche su controsoffitti. Questa tipologia di prove permette di superare le limitazioni dell’attuale procedura sperimentale. Al fine di ottenere una caratterizzazione completa dei controsoffitti, sono stati testati i giunti interni, questi componenti infatti sono risultati danneggiati in seguito a eventi sismici. In particolare, sono stati testati sia giunti ‘standard’ che giunti ‘antisismici’, facenti parte di una particolare linea progettata per resistere all’azione sismica. Sono stati testati a grandezza reale sia controsoffitti con struttura a T (che rappresentano la tipologia più diffusa globalmente), che altri due controsoffitti con diversa sottostruttura metallica, infine le prove hanno riguardato anche controsoffitti con pannelli continui in cartongesso. Per ogni tipologia sono stati eseguite una prova monotona, al fine di individuare i parametri di snervamento e il meccanismo di rottura, e una prova ciclica, seguendo il protocollo indicato nelle FEMA 461 per prove cicliche quasi statiche per componenti non strutturali. I risultati ottenuti hanno permesso di definire la prestazione degli elementi testati e di elaborarne la curva di capacità. Tramite approccio numerico “a cascata”, che permette di eseguire uno studio disaccoppiato dei due elementi, è stato possibile studiare il comportamento dei controsoffitti installati a diversi piani. Sono state realizzate analisi time-history lineari elastiche su edifici multi-piano con diverso periodo di vibrazione e sono stati ricavati gli spettri di risposta al piano. Le curve di capacità dei controsoffitti, definite sperimentalmente, e gli spettri al piano sono stati definiti in un dominio ADRS (Acceleration Displacement Response Domain) al fine di valutare la domanda sismica in termini di spostamento e accellerazione in funzione della capacità dei controsoffitti.
Susila, Gede Adi. "Experimental and numerical studies of masonry wall panels and timber frames of low-rise structures under seismic loadings in Indonesia." Thesis, University of Manchester, 2014. https://www.research.manchester.ac.uk/portal/en/theses/experimental-and-numerical-studies-of-masonry-wall-panels-and-timber-frames-of-lowrise-structures-under-seismic-loadings-in-indonesia(3ceb094b-4e6e-432a-b3de-3d4c306b0551).html.
Повний текст джерелаNolte, Sandra, and sandra nolte@mh org au. "Approaches to the measurement of outcomes of chronic disease self-management interventions using a self-report inventory." RMIT University. Global Studies, Social Science & Planning, 2008. http://adt.lib.rmit.edu.au/adt/public/adt-VIT20080822.151606.
Повний текст джерелаAl-Dodoee, Omar Hashim Hassoon. "Conception et optimisation des matériaux et structures composites pour des applications navales : effet du slamming." Thesis, Brest, 2017. http://www.theses.fr/2017BRES0050/document.
Повний текст джерелаGenerally, when marine vessels encounter the water surface on entry and subsequently re-enter the water at high speed (slamming), this can subject the bottom section of the vessels to both local and global effects and generate unwanted vibrations in the structure, especially over very short durations. In marine design, the vessel speed has become an important aspect for optimal structure. Therefore, design requirements have been optimized in relation to the structural weight. In other hand, the appearance of the composite structures in the last decades has encouraged the exploitation of these structures in major construction projects for lightweight marine and aerospace applications. This is due to the nature of their mechanical properties which shows a high stiffness-to-weight ratio. In contrast, the interaction between deformable structures and free water surface can be modified the fluid flow and changed the estimated hydrodynamic loads comparing with rigid body, due to appearance of hydroelastic effects. Moreover, these structures are always subject to different and complex damage mechanisms under dynamic loading. For these reasons, the flexibility and the damage failure modes in composite materials introduce additional complexity for predicting hydrodynamic loads when interactive with water. This considered a key challenge to use these materials in marine applications. Therefore, special attention must be taken in the design phase and the analysis of performances during lifetime use. The main contributions of this work are the experimental and numerical study of the dynamic behavior of composite panels and the quantification of the effect of the flexibility of these structures on the hydrodynamic loads and the resulting deformations. To study these effects, laminate composite and sandwich panels with two different rigidities and subjected to various impact velocities have been investigated experimentally using high speed shock machine with velocity control system. The dynamic resistance was analysed in terms of hydrodynamic loads, dynamic deformation and failure mechanisms for different impact velocities. The general analysis of experiment results were indicated that more flexible panel has a higher peak force as velocity increases compared with higher stiffness panels. On the other hand, the slamming model was implemented in Abaqus/Explicit software based on Coupled Eulerian Lagrangian model approach (CEL). In addition, different damage modes are developed and constructed using a user-defined material subroutine VUMAT and implemented in Finite element method, including the intralaminar damage, debonding in skin/core interface, and core shear to cover all possible damage modes throughout structures. The numerical model gave a good agreement results in judging with experimental data for prediction of the hydrodynamic force and panel deformation. Additionally, this study gives qualitative and quantitative data which provides clear guidance in design phase and the evolution of performances during lifetime of composite structures, for marine structure designers
Saïd, Didier. "Étude théorique et numérique des vibrations de structures soumises à des chocs pyrotechniques." Cachan, Ecole normale supérieure, 1998. http://www.theses.fr/1998DENS0020.
Повний текст джерелаPitot, de la Beaujardiere Jean-Francois Philipe. "Numerical simulation of the structural response of a composite rocket nozzle during the ignition transient /." 2009. http://hdl.handle.net/10413/925.
Повний текст джерелаPitot, de la Beaujardiere Jean-Francois Philippe. "Numerical simulation of the structural response of a composite rocket nozzle during the ignition transient." Thesis, 2009. http://hdl.handle.net/10413/778.
Повний текст джерелаThesis (M.Sc.Eng.)-University of KwaZulu-Natal, Durban, 2009.
Sofiani, Farid Mehri. "Numerical study on Structural response of dental restorations using finite element method and meshless methods." Master's thesis, 2018. https://repositorio-aberto.up.pt/handle/10216/118167.
Повний текст джерелаSofiani, Farid Mehri. "Numerical study on Structural response of dental restorations using finite element method and meshless methods." Dissertação, 2018. https://repositorio-aberto.up.pt/handle/10216/118167.
Повний текст джерелаDe, Candia SM. "Experimental and numerical investigations into the underwater explosion induced whipping response of submerged platforms." Thesis, 2019. https://eprints.utas.edu.au/31703/1/De_Candia_whole_thesis.pdf.
Повний текст джерелаSheehan, Therese, Xianghe Dai, T. M. Chan, and Dennis Lam. "Structural response of concrete-filled elliptical steel hollow sections under eccentric compression." 2012. http://hdl.handle.net/10454/5916.
Повний текст джерела"Effects of Structural Uncertainty on the Dynamic Response of Nearly-Straight Pipes Conveying Fluid: Modeling and Numerical Validation." Master's thesis, 2017. http://hdl.handle.net/2286/R.I.45028.
Повний текст джерелаDissertation/Thesis
Masters Thesis Mechanical Engineering 2017
Wang, Zhiyu. "Experimental and numerical study of structural frames with semi-interlocking masonry (SIM) infill panels." Thesis, 2017. http://hdl.handle.net/1959.13/1349863.
Повний текст джерелаDry stack masonry is built without mortar. These masonry structures have attracted interest in the construction industry because they are easy to build. This potentially improves productivity and lowers costs, compared to traditional mortar-jointed masonry construction. Masonry walls are often used in framed structures as infill panels. To improve the seismic behaviour of these structures, a novel mortarless masonry building system based on semi-interlocking masonry (SIM) has been developed at the Centre for Infrastructure Performance and Reliability, University of Newcastle, Australia. In this system, the SIM units are capable of relative sliding in-plane when constructed as a panel, and locked against relative movement out-of-plane. Compared with traditional unreinforced masonry (URM), SIM can increase earthquake energy dissipation through friction between bricks. Under seismic loads, SIM panels do not detrimentally interfere with natural frame vibration but contribute positively to earthquake resistance, mainly by increasing damping. Therefore, SIM panels can be used in earthquake resistant framed structures as infill panels, and act as energy dissipation devices. In this thesis, an experimental and numerical study was conducted to investigate the nonlinear static and seismic behaviour of SIM infill panels. The results show that SIM infill panels are a viable alternative to traditional URM infill panels in seismically active areas. In the experimental part of the study, in-plane tests were performed on a steel frame with a topological SIM panel to evaluate the structural potential and the cyclic behaviour of the panels. The in-plane force-displacement behaviour of the structure, its stiffness degradation, energy dissipation, and its response mechanisms were studied and compared to the behaviour of the bare frame. The results indicate that the gap between the frame and the top of the panel significantly influences the composite response of the structure. Next, the responses of a steel frame with a topological SIM panel, and an RC frame with a prototype SIM panel were compared in terms of their crack patterns, hysteretic behaviour and energy dissipation. The prototype SIM panels and topological SIM panels had similar hysteretic behaviour, as well as the same energy dissipation mechanisms. They therefore produced similar seismic response capacities. Then, numerical models were developed in SeismoStruct. This program uses the equivalent diagonal strut model for masonry panels. This model was developed for traditional URM panels based on multiple experimental tests. However, conventional compressive struts do not form in SIM panels. SIM panels provide some resistance to diagonal compression and shear but this resistance relates to frictional forces between bricks and the frame. They are physically different to URM panels. No existing models that reflect the actual physical behaviour of SIM panels were located. In the numerical part of this study, the equivalent strut model was used with parameters adjusted to match the available experimental results for SIM. The model was calibrated and verified by comparing these results with those of the bare RC frame, the RC frame infilled with a prototype SIM panel, the RC frame infilled with a traditional URM panel, the bare steel frame and the steel frame with a topological SIM panel. In addition, model calibration and verification was also conducted for the following case studies: multistorey bare RC frame, multistorey RC frame with traditional URM infill panels and multistorey bare steel frame. Finally, numerical simulations were conducted to evaluate the nonlinear static and seismic behaviour of the SIM infill panels on the multistorey bare RC and steel frames, the multistorey frames with SIM panels with a gap between the top of the panels and the frame, the multistorey frames with SIM panels without a gap between the top of the panels and the frame, and the multistorey frames with traditional URM panels. The results show that the RC frame and the steel frame with SIM infill panels have structural properties which, in combination, help them to improve structural ductility and reduce the base shear force during extreme earthquake events. The experimental tests and numerical modelling conducted for this study were based on prototype SIM panels and topological SIM panels. Further research is needed to investigate how mechanical SIM panels with dowels react in out-of-plane tests and numerical models. The current models are limited to two-dimensional analyses of in-plane behaviour of framed structures with SIM infill panels. Three-dimensional models based on the actual observed behaviour of SIM panels need to be developed to capture the actual physical in-plane and out-of-plane behaviour of these panels.
(7874897), Ryan T. Whelchel. "Evaluation and Structural Behavior of Deteriorated Precast, Prestressed Concrete Box Beams." Thesis, 2019.
Знайти повний текст джерелаSingh, Vikas Pratap. "Response And Reliability Analyses Of Soil Nail Walls." Thesis, 2009. http://hdl.handle.net/2005/1108.
Повний текст джерелаGaraga, Arunakumari. "Factors Affecting The Static And Dynamic Response Of Jointed Rock Masses." Thesis, 2008. http://hdl.handle.net/2005/772.
Повний текст джерелаStephen, D., Dennis Lam, J. Forth, J. Ye, and K. D. Tsavdaridis. "An evaluation of modelling approaches and column removal time on progressive collapse of building." 2018. http://hdl.handle.net/10454/16642.
Повний текст джерелаOver the last few decades, progressive collapse disasters have drawn the attention of codified bodies around the globe; as a consequence, there has been a renewed research interest. Structural engineering systems are prone to progressive collapse when subjected to abnormal loads beyond the ultimate capacity of critical structural members. Sudden loss of critical structural member(s) triggers failure mechanisms which may result in a total or partial collapse of the structure proportionate or disproportionate to the triggering event. Currently, researchers adopt different modelling techniques to simulate the loss of critical load bearing members for progressive collapse assessment. GSA guidelines recommend a column removal time less than a tenth of the period of the structure in the vertical vibration mode. Consequently, this recommendation allows a wide range of column removal time which produces inconsistent results satisfying GSA recommendation. A choice of a load time history function assumed for gravity and the internal column force interaction affects the response of the structure. This paper compares different alternative numerical approaches to simulate the sudden column removal in frame buildings and to investigate the effect of rising time on the structural response.
Siruvole, Sandeep Kumar. "Evaluation of the occupant response and structural damage according to the newly proposed pole test under Federal Motor Vehicle Safety Standard side impact regulation." Thesis, 2007. http://hdl.handle.net/10057/1173.
Повний текст джерелаThesis (M.S.)--Wichita State University, College of Engineering, Dept. of Mechanical Engineering.