Дисертації з теми "Non-structural element"
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Wong, Fuk-Lun Alexander. "Investigations into non-destructive methods of structural testing using finite element models." Thesis, University of Edinburgh, 1987. http://hdl.handle.net/1842/11956.
Повний текст джерелаAhmed, Khaled I. E. "Finite element modeling of non-linear structural response of transmission towers including bolted joint slippage." Thesis, University of British Columbia, 2007. http://hdl.handle.net/2429/31507.
Повний текст джерелаApplied Science, Faculty of
Mechanical Engineering, Department of
Graduate
Chagneau, Anthony. "Méthode de zoom structural étendue aux hétérogénéités non linéaires." Thesis, Montpellier, 2019. http://www.theses.fr/2019MONTS051.
Повний текст джерелаA multi-scale approach introduces a structural zoom method into a region of interest, called the patch, using only field projection operators. The different behaviours in the patch and in the overall structure are taken into account without using weight parameters between local and global energies such as the Arlequin method. Our initial problem is to digitally reliable the structural zoom method for the linear case, and more precisely to choose a high-performance solver on Krylov spaces, as well as effective preconditioning and ordering adapted to the system to be solved. Once the solver is chosen, this approach is mechanically validated in the mean of two tests, namely traction and shear. A parametric study of the patch is performed to obtain an acceptable solution. The next objective is to extend this approach to regions with heterogeneities of non-linear behaviour. The method has been reached out for elastoplastic behaviour. Initial hypothesis assumes the elastoplastic behaviour only inside the patch and an elastic behaviour of the overall structure as well as of the gluing area. Finally, this approach is validated with different tests including several faults and therefore several patches as well as different loading history
Aragao, Almeida Salvio Jr. "Modeling of Concrete Anchors Supporting Non-Structural Components Subjected toStrong Wind and Adverse Environmental Conditions." University of Toledo / OhioLINK, 2019. http://rave.ohiolink.edu/etdc/view?acc_num=toledo1564764404011142.
Повний текст джерелаFerrari, Rosalba (ORCID:0000-0002-3989-713X). "An elastoplastic finite element formulation for the structural analysis of Truss frames with application to ha historical iron arch bridge." Doctoral thesis, Università degli studi di Bergamo, 2013. http://hdl.handle.net/10446/28959.
Повний текст джерелаGuney, Murat Efe. "A Numerical Procedure For The Nonlinear Analysis Of Reinforced Concrete Frames With Infill Walls." Master's thesis, METU, 2005. http://etd.lib.metu.edu.tr/upload/12606318/index.pdf.
Повний текст джерелаMatthews, Russell Stuart. "The structural behaviour of brick sewer pipes in soft ground : the examination of brick and reinforced plastic pipes, in granular soil, and under plane strain conditions, using fully non-linear finite element models and a large-scale physical testing prog." Thesis, University of Bradford, 1985. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.287758.
Повний текст джерелаSaadé, Katy. "Finite element modeling of shear in thin walled beams with a single warping function." Doctoral thesis, Universite Libre de Bruxelles, 2005. http://hdl.handle.net/2013/ULB-DIPOT:oai:dipot.ulb.ac.be:2013/211043.
Повний текст джерелаA unified approach is formulated in this thesis for 3D thin walled beam structures with arbitrary profile geometries, loading cases and boundary conditions. A single warping function, defined by a linear combination of longitudinal displacements at cross sectional nodes (derived from Prokic work), is enhanced and adapted in order to qualitatively and quantitatively reflect and capture the nature of a widest possible range of behaviors. Constraints are prescribed at the kinematics level in order to enable the study of arbitrary cross sections for general loading. This approach, differing from most published theories, has the advantage of enabling the study of arbitrary cross sections (closed/opened or mixed) without any restrictions or distinctions related to the geometry of the profile. It generates automatic data and characteristic computations from a kinematical discretization prescribed by the profile geometry. The amount of shear bending, torsional and distortional warping and the magnitude of the shear correction factor is computed for arbitrary profile geometries with this single formulation.
The proposed formulation is compared to existing theories with respect to the main assumptions and restrictions. The variation of the location of the torsional center, distortional centers and distortional rotational ratio of a profile is discussed in terms of their dependency on the loading cases and on the boundary conditions.
A 3D beam finite element model is developed and validated with several numerical applications. The displacements, rotations, amount of warping, normal and shear stresses are compared with reference solutions for general loading cases involving stretching, bending, torsion and/or distortion. Some examples concern the case of beam assemblies with different shaped profiles where the connection type determines the nature of the warping transmission. Other analyses –for which the straightness assumption of Timoshenko theory is relaxed– investigate shear deformation effects on the deflection of short and thin beams by varying the aspect ratio of the beam. Further applications identify the cross sectional distortion and highlight the importance of the distortion on the stresses when compared to bending and torsion even in simple loading cases.
Finally, a non linear finite element based on the updated lagrangian formulation is developed by including torsional warping degrees of freedom. An incremental iterative method using the arc length and the Newton-Raphson methods is used to solve the non linear problem. Examples are given to study the flexural, torsional, flexural torsional and lateral torsional buckling problems for which a coupling between the variables describing the flexural and the torsional degrees of freedom occurs. The finite element results are compared to analytical solutions based on different warping functions and commonly used in linear stability for elastic structures having insufficient lateral or torsional stiffnesses that cause an out of plane buckling.
Doctorat en sciences appliquées
info:eu-repo/semantics/nonPublished
Yaqoob, Saima. "BRIDGE EDGE BEAM : NON-LINEAR ANALYSIS OF REINFORCEDCONCRETE OVERHANG SLAB BY FINITEELEMENT METHOD." Thesis, KTH, Bro- och stålbyggnad, 2017. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-222806.
Повний текст джерелаNogueira, Caio Gorla. "Um modelo de confiabilidade e otimização aplicado às estruturas de barras de concreto armado." Universidade de São Paulo, 2005. http://www.teses.usp.br/teses/disponiveis/18/18134/tde-21092005-084457/.
Повний текст джерелаIn this work, a reliability based optimization model is proposed for the analysis of reinforced concrete structures, in which the reliability index is introduced as a constraint. The mechanical model allows to consider the physical non-linearity of the concrete and steel materials, as well as the geometrical non-linear effects. The mechanical model is used to find the structure limit loads. The failure scenarios for the probabilistic analysis are characterized by the concrete ultimate strains in the compressed region of the section and the steel ultimate tensile strains in the reinforcement position. The serviceability limit state is verified for the excessive displacements for the structure bars. The limit state function is build by using the response surface method, computing the reliability index and the failure probability only considering the first failure mode. The optimization and reliability processes are independents built leading two different system of equations that are coupled together to find the final solution. The material cost of the structure was adopted as the objective function to be minimized for the optimization process. The proposed coupled optimization-reliability process is employed to analyse reinforced concrete beams. The developed procedure in the context of reliabilty methods and reinforced concrete structures analysis can also be applied for reliability analysis of reinforced concrete frames
Neves, Rodrigo de Azevêdo. "Desenvolvimento de modelos mecânico-probabilísticos para estruturas de pavimentos de edifícios." Universidade de São Paulo, 2004. http://www.teses.usp.br/teses/disponiveis/18/18134/tde-13042005-081959/.
Повний текст джерелаIn this work, new local approaches of reliability analysis applied to reinforced concrete grid structures are developed, taking into account several critical cross-section failure probabilities. Monte Carlo simulations are coupled with finite element analyses and optimization techniques with techniques to take into account the failure in the most important cross-sections, in order to classify the severity of failure modes. The failure scenario is depicted when either a concrete fiber or a steel bar reaches the predefined conventional limit. This scenario gives the structural ultimate capacity, which can be represented by a scalar coefficient multiplying all the loads acting on the structure. To achieve the failure scenario, an incremental and iterative procedure is used. To carry out the reliability analysis, the mechanical analysis has to be performed for different sets of random variable realizations of the mechanical, material and geometrical properties. The set of ultimate coefficients obtained from several mechanical analyses defines the response surface. The coupling between Monte Carlo simulations and response surface techniques applied in this work aims to reduce significantly the number of the finite element model calls, and hence to deal with real, or high-scale, reinforced concrete grids where large number of failure components can be found. The proposed procedure is then applied to reinforced concrete grids in order to show some more complex reinforced concrete examples
Bennett, Terry. "Finite element-based non-linear dynamic soil-structure interaction." Thesis, University of Sheffield, 2002. http://etheses.whiterose.ac.uk/14472/.
Повний текст джерелаAttabi, Mohamed Mohamed Hussein. "La fissuration dans les systemes en beton precontraint." Paris 6, 1987. http://www.theses.fr/1987PA066246.
Повний текст джерелаSaab, Hassan A. "Non-linear finite element analysis of steel frames in fire conditions." Thesis, University of Sheffield, 1990. http://etheses.whiterose.ac.uk/1868/.
Повний текст джерелаRyckelynck, David. "Sur l'analyse des structures viscoplastiques : stratégie adaptative et contrôle de qualité." Cachan, Ecole normale supérieure, 1998. http://www.theses.fr/1998DENS0003.
Повний текст джерелаKurniawan, Cyrilus Winatama. "Flexural behaviour and design of the new LiteSteel beams." Thesis, Queensland University of Technology, 2007. https://eprints.qut.edu.au/16674/1/Cyrilus_Kurniawan_Thesis.pdf.
Повний текст джерелаKurniawan, Cyrilus Winatama. "Flexural behaviour and design of the new LiteSteel beams." Queensland University of Technology, 2007. http://eprints.qut.edu.au/16674/.
Повний текст джерелаGaiotti, Regina. "Interactive effects of non-structural elements on the behaviour of tall building structures." Thesis, McGill University, 1990. http://digitool.Library.McGill.CA:80/R/?func=dbin-jump-full&object_id=39225.
Повний текст джерелаYoung, Kuao-John. "A unified approach to the formulation of non-consistent rod and beam mass matrices for improved finite element modal analysis." Diss., This resource online, 1990. http://scholar.lib.vt.edu/theses/available/etd-07282008-135633/.
Повний текст джерелаVasudevan, S. "Development of new spatially curved non-linear frame finite element using a mixed variational principle and rotations as independent variables." Diss., Georgia Institute of Technology, 1998. http://hdl.handle.net/1853/13069.
Повний текст джерелаAbate, Marco. "Seismic Behaviour of Post-Installed Anchors: Non-Structural Components and Art Objects Fastening." Doctoral thesis, Università degli studi di Padova, 2015. http://hdl.handle.net/11577/3424126.
Повний текст джерелаL’osservazione del danno nei recenti eventi sismici (L’Aquila 2009, Chile 2010, Christchurch 2011, Tohoku 2011, Emilia 2012) aiuta nell’identificazione delle criticità legate alla risposta al terremoto degli elementi non strutturali (Miranda et al. 2012). Generalmente tali elementi sono parte dei fabbricati e possono appartenere al sistema architettonico, al sistema impiantistico o al contenuto. La rottura degli elementi non strutturali può rappresentare un pericolo rilevante per la salvaguardia della vita umana e porta perdite di grande valore, nonché contribuisce all’impatto gravoso del sisma per la società (Miranda et al. 2012). Questa tesi contiene i risultati di una campagna sperimentale di ricerca che si poneva lo scopo di valutare diverse tipologie di ancoranti post installati sotto azione sismica. L’argomento appena menzionato è considerato di grande importanza per il ruolo centrale di questi dispositivi nell’ancoraggio di elementi non strutturali per evitare rotture e danneggiamenti che possano causare pericolo per le persone, grosse perdite economiche e interruzione dell’operatività di un edificio nelle settimane o mesi nel seguito di un terremoto (Taghavi and Miranda 2003; ATC 69 2008). Durante un terremoto gli elementi non strutturali dovrebbero resistere ad elevate forze d’inerzia, trasferite attraverso la connessione agli elementi strutturali (travi, solai, pilastri, pareti) o spesso ad altri elementi non strutturali, come le pareti di tamponamento. In molti casi questi punti di connessione sono realizzati con l’uso di ancoranti post installati i quali dovrebbero essere adeguatamente progettati per assicurare un buon comportamento alle azioni sismiche (Makris and Black 2001; Naumoski et al. 2002; Solomos and Berra 2006; Hoehler et al. 2011). Tra tutti i requisiti, quello della affidabilità in termini di modalità di rottura e valore di resistenza risulta fondamentale per ottenere un progetto degli ancoranti post installati che sia valido in campo dinamico. Ad esempio, progetti di sistemi antincendio nelle scuole, di attrezzature mediche negli ospedali, di oggetti d’arte esposti nei musei necessitano di una buona conoscenza della prestazione dei sistemi di ancoraggio da impiegare. Tale conoscenza deve coprire sia la resistenza, per lo stato limite di salvaguardia della vita (SLV), che gli spostamenti in grado di permettere la funzionalità dell’elemento non strutturale, per lo stato limite di esercizio (SLE). Lo scopo della campagna sperimentale presentata all’interno di questo lavoro di ricerca è lo studio del comportamento sismico di diversi sistemi di ancoraggio attraverso prove su tavola vibrante. Due strutture con pianta a croce sono state costruite a scala reale, una consisteva di pareti in calcestruzzo e una di un telaio in calcestruzzo armato con pareti di tamponamento in muratura. Due condizioni differenti sono state studiate nel caso di ancoranti installati in calcestruzzo, ovvero supporto non fessurato e fessurato. Mattoni forati Poroton® sono stati utilizzati per costruire il campione con pareti di tamponamento in muratura. Le prove triassiali sono state progettate sulla base dello standard AC156 (2010) che fornisce delle impostazioni di prova per la certificazione sismica di elementi non strutturali da prove su tavola vibrante. Gli esperimenti sono stati realizzati con l’applicazione alla tavola di segnali scalati a ZPA (Zero Period Acceleration) crescenti per studiare gli effetti indotti sui campioni all’aumentare dell’intensità dell’azione sismica. I risultati hanno permesso di studiare il comportamento sismico generale di ciacun fissaggio, specialmente in termini di modalità di rottura, massimo carico dinamico sopportato e sfilamento del campione dal supporto. Anche l’influenza delle fessure per questi parametri è stata aprofondita per l’unità strutturale di calcestruzzo. Il programma di prova ha anche permesso un confronto completo tra diverse metodologie di ancoraggio, come gli ancoranti ad espansione, chimici o a sottosquadro. Recenti studi (Rieder 2009; Watkins 2011; Mahrenholtz et al. 2012) si sono concentrati sulla valutazione sismica di ancoranti metallici in calcestruzzo attraverso prove su tavola vibrante, invece il comportamento di sistemi di fissaggio impiegati in muratura e di ancoranti plastici in generale non sono stati investigati in modo esaustivo fino ad ora (Algin 2007; Sinica et al. 2010). Ciononostante queste applicazioni appena citate sono di elevato interesse per la loro presenza diffusa nelle costruzioni. Quindi durante lo studio sperimentale una particolare attenzione è stata data alle questioni riguardanti gli ancoranti plastici e le installazioni in muratura.
Baird, Andrew. "Seismic performance of precast concrete cladding systems." Thesis, University of Canterbury. Civil and Natural Resources Engineering, 2014. http://hdl.handle.net/10092/9997.
Повний текст джерелаDivoux, Patrick. "Modélisation du comportement hydro-mécanique des discontinuités dans les structures et les fondations rocheuses : application aux barrages en béton." Université Joseph Fourier (Grenoble ; 1971-2015), 1997. http://www.theses.fr/1997GRE10192.
Повний текст джерелаSmith, Chandler B. "Sparsity Constrained Inverse Problems - Application to Vibration-based Structural Health Monitoring." ScholarWorks @ UVM, 2019. https://scholarworks.uvm.edu/graddis/1143.
Повний текст джерелаNasu, Daichi [Verfasser], Harald [Akademischer Betreuer] Kolmar, and Gerd [Akademischer Betreuer] Buntkowsky. "Non-Natural Elements for Peptide-Based Molecular Design, Structural Analysis, and Functional Modifications / Daichi Nasu. Betreuer: Harald Kolmar ; Gerd Buntkowsky." Darmstadt : Universitäts- und Landesbibliothek Darmstadt, 2016. http://d-nb.info/1112044949/34.
Повний текст джерелаGaignebet, Yvon. "Approche non incrémentale des calculs de chocs pour des structures viscoplastiques." Cachan, Ecole normale supérieure, 1996. http://www.theses.fr/1996DENS0008.
Повний текст джерелаBajaj, Srikanth. "EVALUATION OF RESIDUAL STRENGTH OF CORRODED STRUCTURAL STEEL PLATES AND STIFFENED PANELS." University of Akron / OhioLINK, 2018. http://rave.ohiolink.edu/etdc/view?acc_num=akron1543570329693244.
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 джерелаBakešová, Martina. "Stavební průzkum a diagnostika zděné konstrukce." Master's thesis, Vysoké učení technické v Brně. Fakulta stavební, 2015. http://www.nusl.cz/ntk/nusl-227513.
Повний текст джерелаSPERANZA, ELISA. "The Importance of Calibration and Modelling Non-Structural Elements in the Evaluation of Seismic Vulnerability Index of Strategic Buildings Before and After Retrofitting." Doctoral thesis, Università Politecnica delle Marche, 2020. http://hdl.handle.net/11566/274486.
Повний текст джерелаThis thesis aims to investigate on the modelling of the non-structural elements related to internal and external infill walls, trying to quantify the difference induced by different modelling strategies on the value of the seismic vulnerability index with reference to strategic buildings. On this purpose, two case studies are analysed: the Benedetto Croce high school in Avezzano and the Varano high school in Camerino, r.c. frame buildings retrofitted with external steel towers equipped with viscous dampers at the basis. For both case studies, three models are implemented, before and after the retrofitting, which are characterized by an increasing level of detail: model A with only structural components, model B with external infill panels modelled as equivalent connecting struts according to literature, and model C with external and internal infill walls calibrated through the results of in-situ dynamic tests. As regards the pre-retrofitting phase, the calculation of the seismic vulnerability index was carried out by means of nonlinear static analysis (pushover). As for the post-retrofitting phase, the calculation of the seismic vulnerability index was carried out by means of non-linear dynamic analysis (I.D.A). The results are shown in terms of comparison between the capacity curves obtained with push over analyses (pre-retrofitting) and with incremental dynamic analyses for the different model. In addition, the outcomes are shown also in terms of intensity level of the seismic action necessary to reach a predetermined limit state for model A, model B and model C.
Jayasooriya, Jayasooriya Hevavitharanage Aruna Ruwan. "Vulnerability and damage analysis of reinforced concrete framed buildings subjected to near field blast events." Thesis, Queensland University of Technology, 2010. https://eprints.qut.edu.au/67925/1/Ruwan_Jayasooriya_Thesis.pdf.
Повний текст джерелаDarcy, Greg. "Structural behaviour of an innovative cold-formed steel building system." Thesis, Queensland University of Technology, 2005. https://eprints.qut.edu.au/16589/1/Greg_Darcy_Thesis.pdf.
Повний текст джерелаDarcy, Greg. "Structural behaviour of an innovative cold-formed steel building system." Queensland University of Technology, 2005. http://eprints.qut.edu.au/16589/.
Повний текст джерелаBertran, Rojo Marc. "Correr entre los escombros - Courir entre les débris. La mobilité individuelle en période de crise sismique : facteur d'exposition humaine dans le cas du séisme de Lorca (Espagne 2011)." Thesis, Grenoble, 2014. http://www.theses.fr/2014GRENU040/document.
Повний текст джерелаMay the eleventh, 2011, a double earthquake struck the town of Lorca in southeastern Spain. The earthquake had serious consequences for the population and caused extensive damage to buildings in the town. Earthquakes are phenomena characterized by their relatively low frequency and their violence. In the Mediterranean Basin, most earthquakes are only perceptible using measuring instruments. Recent seismic events have surprised the scientific community by their moderate magnitude associated with a high intensity. This is particularly the case of Lorca's earthquake. In the last 40 years, the Spanish authorities have tried to develop prevention towards seismic phenomenon. Measures have been taken by improving seismic building codes or by updating the seismic zoning, each revision taking into account wider zones at risk. In general, events give rhythm to the evolution of these measures. However, variables like the location of cities in seismic zones and the vulnerability of existing buildings can hardly be adjusted to these new standards. When an earthquake affects a town, danger is mostly caused by building failure. However, injuries and fatalities are due to the spatial and temporal coincidence between the individual and the danger. In this context, we propose an approach focused on the individual. During a seismic crisis, individual mobility appears to be the element that will allow the spatial coincidence between the danger and the individual. We analyzed individual mobility during seismic crisis by collecting very precise information regarding spatial and temporal aspects of mobility through qualitative interviews. Simultaneously, we carried out a study of dangers observed in the case of Lorca. In general, most of the fatalities caused by earthquakes occur inside collapsed buildings. However, in the case of low-to-moderate-intensity earthquakes, danger is related to the fall of non-structural elements, especially frontage elements. By combining spatial and temporal mobility of individuals with dangers, we conclude that individual mobility is a determinant factor of human exposure. The factors that will determine mobility are mainly related to the immediate protection measures as well as the family organization prior to the town evacuation. Finally, spatial analysis allowed assessing dangers. The associated uncertainty of this evaluation makes it difficult a more accurate study, but offers perspectives for future work. This work proposes the adaptation of a methodology to collect and analyze spatial and temporal dynamics related to individuals. Developed initially for flash flood analysis, this methodology is transferable to future events, enabling comparative studies
Aquino, João José Redondo de. "Structural numerical simulation code development with isogeometric anakysis (IGA)." Master's thesis, Universidade de Aveiro, 2017. http://hdl.handle.net/10773/22375.
Повний текст джерелаIn the present day most product development industries uses the Finite Element Method (FEM) for structural analysis. Designers model the product geometries using Computer-Aided Design (CAD) software, the geometries are then fitted for analysis, by the analysts, with a mesh approximation that inevitably results in loss of accuracy. Achieving the best geometry description for complex components can be a complex task and it can take a lot of time. Considering this drawback, a new method was developed which takes advantages of curve representation tools and uses them as bases for analysis. Aiming for no loss of geometrical precision, this new method has been called "Isogeometric Analysis" (IGA). The smoothness of Spline representations used in Isogeometric Analysis can be useful for a particular branch of structural analysis which is the analysis of plates and shells. The classic thin plate theory developed by Gustav Kirchhoff requires a geometry description with C1 continuity between elements which is normally defined by high order polynomial functions, which typically represents a problem with the piecewise Lagrangian shape functions used in conventional FEM. The present work explores parametric descriptions used as basis for Isogeometric Analysis, such as Bézier curves, B-splines and NURBS, taking advantage of its smoothness to develop formulations for thin plate elements. The 4-node rectangular derived by Melosh, O. Zienkiewicz and Y. Chung called MCZ thin plate element based on Kirchhoff assumptions, was the starting point to build up to a NURBS-based thin plate element. MCZ thin plate elements, NURBS-based thin plate elements (with different order geometries) and Abaqus commercial software shell elements are evaluated by means of classical plate benchmarks comparing the elements convergences and overall performance. It can be shown that the proposed NURBS-based formulation is reliable for the analysis of thin structures.
Nos dias de hoje a maioria da indústria de desenvolvimento do produto utiliza o Método dos Elementos Finitos (MEF) na análise estrutural. Os desenhistas modelam o produto através de ferramentas de Computer-Aided Design (CAD). As geometrias são depois ajustadas para a análise pelos analistas que constroem uma aproximação através de uma malha de elementos finitos, o que inevitavelmente resulta numa perda de precisão geométrica. Para conseguir a melhor aproximação à geometria original para componentes complexos o processo pode ser complicado e pode consumir muito tempo. Considerando esta desvantagem foi desenvolvido um novo método que tira partido da descrição geométrica das ferramentas de desenho e utiliza as funções base das curvas para analise, com o objectivo de não haver perda de precisão geométrica, este novo método tem o nome de “Análise Isogeométrica” (IGA). A suavidade das geometrias Splines usadas na análise isogeometrica pode ser muito útil num ramo particular da análise estrutural, no estudo das placas e cascas. A teoria clássica de análise de placas finas de Kirchhoff requer uma descrição geométrica que tenha continuidade C1 entre elementos, que é normalmente definida por polinómios de ordem elevada, que são tipicamente um problema para as funções de forma Lagrangeanas usadas em MEF. O presente trabalho explora as descrições geométricas utilizadas como funções de forma para a análise isogeométrica como as curvas de Bézier, as B-splines e as NURBS, tirando vantagem da facilidade de estas conseguirem a requerida continuidade entre elementos para criar elementos de placas finas com as funções de base NURBS como funções de forma. É utilizado o elemento de placa fina MCZ desenvolvido por Melosh, O. Zienkiewicz e Y. Chung com base nas premissas de Kirchhoff como ponto de partida para desenvolver o elemento com base em NURBS. No fim os elementos de placas finas MCZ, os elementos com funções de base NURBS (com geometrias de diferentes ordens) e elementos do tipo casca do software comercial Abaqus são avaliados através de uma série de diferentes problemas clássicos de placas, comparando a convergência e o desempenho global. É possivel ver que a formulação proposta é fidedigna na análise de estruturas de placa fina.
Kesawan, Sivakumar. "Fire performance and design of light gauge steel frame wall systems made of hollow flange sections." Thesis, Queensland University of Technology, 2015. https://eprints.qut.edu.au/120153/1/Kesawan_Sivakumar_Thesis.pdf.
Повний текст джерелаAmancio, Daniel de Traglia. "Avaliação da integridade estrutural de elementos de concreto armado a partir das propriedades modais obtidas por técnicas de excitações aleatórias e transientes." Universidade de São Paulo, 2016. http://www.teses.usp.br/teses/disponiveis/18/18134/tde-25052016-085152/.
Повний текст джерелаThe experimental dynamic analysis has been widely investigated as a tool to assess integrity of reinforced concrete structures. State-of-the-art modal-based techniques for structural damage analysis use resonance frequencies, modal deformed, curvature and modal damping analysis. There are also techniques based on nonlinear dynamic response that despite the large potential for damage detection, have not been considered in recent years. This work aims to evaluate the structural integrity of reinforced concrete beams through the dynamic response behavior. Dynamic tests were performed on two reinforced concrete beams with 3.5 meters of length, 250 mm of width, 350 mm of height and identical reinforcement rates, but different steel bars diameters, 2 ϕ 16 mm e 8 ϕ 8 mm, respectively. Beams were initially intact and were subjected to loading and unloading cycles with increasing intensity until the rupture of the concrete beam. After each cycle, the dynamic properties were evaluated experimentally with random and transient excitation signals to determine parameters that indicate gradual deterioration of the beam. Different amplitudes of the excitation force were applied during dynamic testing of concrete beams. These results indicated that an increase in amplitude of dynamic excitation force caused reductions in frequency resonances by 1.1% and 2.4%, associated with the random and transient excitations, respectively. Furthermore, a non-linear behavior of the damping ratios related to random excitations was observed while a linear relationship with transient excitation was found. Moreover, it was found that the resonance frequency decreased with the cracking-related reduction of beam stiffness, caused by increasing level of loading. Additionally, the values of the damping ratios after each cycle behaved non-linearly assuming different values according to the used excitation technique. It is believed that this non-linearity can be related to the loading-related structural damage of the reinforced concrete beam. Therefore, the energy dissipation related to cracking initiation, configuration and propagation in reinforced concrete elements played an important role in the damping ratios of concrete beams.
Pecorella, Daniele. "Methodology for the design and optimization of a morphing wing droop-nose structure for greener aircraft." Master's thesis, Alma Mater Studiorum - Università di Bologna, 2022.
Знайти повний текст джерелаSusila, 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 джерелаViljoen, Awie. "Analysis and Optimum Design of stiffened shear webs in airframes." Diss., 2004. http://hdl.handle.net/2263/23127.
Повний текст джерелаDissertation (MEng (Mechanical and Aeronautical Engineering))--University of Pretoria, 2006.
Mechanical and Aeronautical Engineering
unrestricted
Le, Tri. "Non-linear finite element dynamic analysis of tapered hollow steel poles for passive base isolation." 2008. http://hdl.handle.net/10106/929.
Повний текст джерелаNasu, Daichi. "Non-Natural Elements for Peptide-Based Molecular Design, Structural Analysis, and Functional Modifications." Phd thesis, 2016. https://tuprints.ulb.tu-darmstadt.de/5252/1/DISSERTATION_Daichi%20Nasu%20Final%20ver.pdf.
Повний текст джерелаGhanbari, Ghazijahani T. "Structural behaviour of thin-walled steel elements with geometric and sectional non-uniformities." Thesis, 2017. https://eprints.utas.edu.au/23788/2/Ghanbari_Ghazijahani_whole_thesis_ex_pub_mat.pdf.
Повний текст джерелаChang, Wei-Chung, and 陳威中. "A Research on Evaluating Floor Vibration in Earthquakes for Non-structural Elements Damage Estimate." Thesis, 2008. http://ndltd.ncl.edu.tw/handle/39314646049352560857.
Повний текст джерела國立成功大學
建築學系碩博士班
96
This study surveyed strong motion data of buildings in the 921 Chi-Chi 、1022、331 and the 0401 earthquakes to conclude on two simplified equations for floor velocity and displacement prediction. Damage state of various non-structural elements by different investigators were also collected and summarized in this research. Combining these data, the non-structural element performance in a building can be estimated so long as the fundamental period of the building and the PGA is known. Keywords:non-structural elements、damage evaluation、floor displacement 、floor velocity
Narasimhan, S. "Three Dimensional Viscoplastic And Geomertrically Non-Linear Finite Element Analysis Of Adhesively Bonded Joints." Thesis, 1998. http://etd.iisc.ernet.in/handle/2005/2166.
Повний текст джерелаBIANCHI, SIMONA. "Multi-performance evaluation of traditional and low-damage non-structural components." Doctoral thesis, 2020. http://hdl.handle.net/11573/1541562.
Повний текст джерелаAraújo, Vital Nai Quei Pereira. "Análise comparativa de modelos de cálculo de estruturas de betão armado." Master's thesis, 2013. http://hdl.handle.net/10316/38510.
Повний текст джерелаNesta tese realizou-se uma abordagem não linear de uma viga contínua de betão armado, de dois tramos de um trabalho experimental anteriormente feito por Ana Maria S. Teixeira Bastos (1997, FEUP), e compara-se os resultados com programas comerciais de cálculo de elementos finitos. Na análise não linear utilizaram-se modelos elasto-plásticos e fendilhação para betão, aplicados através do Método de Elementos Finitos (MEF). Efectuou-se o dimensionamento de uma estrutura com modelos de análise-linear elástica com ou sem redistribuição. Comparou-se os resultados experimentais das vigas com os obtidos com os programas comerciais de software midas® FEA e Abaqus® CAE 6.10-1, usando elementos finitos bidimensionais, modelo elasto-plástico e modelo de fendilhação distribuída (“Smeared Crack”). E obteve-se conclusões relativas aos modelos utilizados, documentando de forma conveniente os casos de aplicação das ferramentas e modelos.
This thesis made an approach to linear and non-linear analysis of a reinforced concrete beam, the two spans of structure an experimental work previously done by Ana Maria S. Teixeira Bastos (1997, FEUP). The results were compared with commercial software’s of finite elements calculations. The elasto-plastic and smeared crack models are applied to twodimensional formulations of Finite Element Methods (FEM). The design of the structure considering the linear elastic behaviour with or without redistribution was made. The comparison of experimental results of beams with midas® FEA and Abaqus® CAE 6.10-1 commercial software´s was made, using two-dimensional finite elements with elasto-plasticity and the Smeared Crack models. The conclusions were made about the results obtained with the models used in the cases of application of the tools were documented in an appropriate way.
Han, Je Heon. "Investigation on Wave Propagation Characteristics in Plates and Pipes for Identification of Structural Defect Locations." Thesis, 2013. http://hdl.handle.net/1969.1/151345.
Повний текст джерелаDI, RE PAOLO. "3D beam-column finite elements under tri-axial stess-strain states: non-uniform shear stress distribution and warping." Doctoral thesis, 2017. http://hdl.handle.net/11573/937922.
Повний текст джерелаAjith, V. "Wave Propagation in Healthy and Defective Composite Structures under Deterministic and Non-Deterministic Framework." Thesis, 2012. http://hdl.handle.net/2005/3253.
Повний текст джерела