Beams Plates
Mostrando 13-24 de 24 artigos, teses e dissertações.
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13. Estudo experimental de sistemas de reforço ao cisalhamento em vigas de concreto armado utilizando-se polímetro reforçado com fibras de carbono (PRFC)
The present work studied the behavior of Carbon Fiber Reinforced Polymer (CFRP) composite used as strengthening and rehabilitating structural material in reinforced concrete (RC) beams submitted to shear stress. The current state of the knowledge related to this issue is presented, and different conceptual and design models for shear strengthening of RC beam
Publicado em: 2008
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14. Sandwich structures analysis : design parameters / Analise de estruturas sanduiche : parametros de projeto
The sandwich structures have aroused great interest and have already been very widespread in several branches in industries, such as in the aerospace, military, naval and civil construction industries. This is due to their property to combine both high bending rigidity and the low weight, resulting in a very efficient structure. Thus, the analysis and also t
Publicado em: 2008
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15. FINITE ELEMENTS WITH SPLINE FUNCTIONS APPLIED TO STRUCTURAL DYNAMICS AND INSTABILITY / ELEMENTOS FINITOS COM FUNÇÕES SPLINE PARA INSTABILIDADE E DINÂMICA DE ESTRUTURAS
The present work presents a subparametric finite element model with spline displacement functions, implemented for static, dynamic and instability analysis of folded plates, thin-walled beams, box girders, and elongated structures such as bridges and structural shapes. A drilling degree of freedom (rotation about an axis perpendicular to the plane of the ele
Publicado em: 2008
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16. Prebuckling enhancement of beams and plates under uncertain loadings and arbitrary initial imperfections
Crooked beams and plates with arbitrary initial geometric imperfections are optimized in order to improve their prebuckling response in the presence of uncertain loadings. A novel optimization approach is presented to simultaneously handle the two types of uncertainties: arbitrary initial imperfection patterns and arbitrary loadings. A remarkable improvement
Journal of the Brazilian Society of Mechanical Sciences and Engineering. Publicado em: 2007-12
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17. Estrutura mista madeira-chapa dobrada submetida à flexão simples / Mixing structure timber-cold formed steel plates submitted to the bending
Este trabalho trata de estudo teórico e experimental de vigas de madeira e vigas mistas, compostas de madeira e chapa dobrada, submetidas à flexão simples. A combinação de materiais diferentes visa ao aproveitamento das vantagens de cada material, de forma a se ter um conjunto viável, em termos construtivos, estruturais e econômicos. Para a efetivaç�
Publicado em: 2007
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18. Mixing structure timber-cold formed steel plates submitted to the bending / Estrutura mista madeira-chapa dobrada submetida à flexão simples
Este trabalho trata de estudo teórico e experimental de vigas de madeira e vigas mistas, compostas de madeira e chapa dobrada, submetidas à flexão simples. A combinação de materiais diferentes visa ao aproveitamento das vantagens de cada material, de forma a se ter um conjunto viável, em termos construtivos, estruturais e econômicos. Para a efetivaç�
Publicado em: 2007
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19. Modelagem por elementos finitos de placas compostas dotadas de sensores e atuadores piezoelÃtricos : implementaÃÃo computacional e avaliaÃÃo numÃrica / Finite element modeling of composite plates incorporating piezoelectric sensors and actuators: implementation and numerical assessment
This Dissertation presents a methodology based on the Finite Element method for the modeling of laminated composite beams and plates containing piezoelectric sensors and actuators. The fundamental concepts and the theoretical developments are presented, followed by a number of numerical simulations performed in MATLABÂ environment. The finite element used i
Publicado em: 2006
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20. Analise numerica e experimental de fluxo de energia em estruturas
This work deals with the theoretical, numerical and experimental aspects of energy flow in structures. The mathematical formulation for computation of power flow maps is presented for beams (Euler-Bernoulli and Timoshenko) and plates (Kirchhoff and Mindlin) The physical meaning of active and reactive power is discussed. The reactive intensity is related with
Publicado em: 2001
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21. Desenvolvimento de um elemento finito hierarquico, para analise de placas e cascas, a partir do elemento isoparametrico triangular quadratico
This work begins with the development of one isoparametric triangular quadratic element, considering the analysis of plate and shell starting from their mid-surfaces. This formulation proves itself efficient by its simplicity and mainly by the possibility of considering the effect of shear stresses along the thickness of the element. Afterwards, is shown sta
Publicado em: 2000
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22. Controle ativo de vibrações em vigas e placas usando uma abordagem de intensidade estrutural / Active control oi vibmtion in beams and plates using a structuml intensity approach
The main goal of this work was to study the aplicability of a new methodology to control structural vibrations using a structural intensity approach. This methodology was then used to control flexural vibration in beams and plates. Techniques to estimate the structural intensity were revised. Accelerometers and piezelectric sensors were used in order to meas
Publicado em: 1999
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23. Sobre a utilização de beta -splines no metodo dos elementos finitos para a solução de barras, vigas e placas finas / About the use of beta -splines functions in finite element method to the solution of Bar and Beam structures and Thin Plates
The present Thesis is a step by step formulation for the use of B-splines Functions in the Finite Element Method to approximate de solution of Bars, Beams and Thin Plates structures. The smooth character of the B-Splines given by the C IND. 2 continuity of these cubic polynomials provides a robust frame to the trial functions, increasing thus convergence and
Publicado em: 1999
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24. DEVELOPMENT OF A SIMPLE FAMILY OF FINITE ELEMENTS FOR BEAMS, PLATES AND SHELLS INCLUDING THE EFFECT OF CROSS DISTORTION / DESENVOLVIMENTO DE UMA FAMÍLIA SIMPLES DE ELEMENTOS FINITOS PARA VIGAS, PLACAS E CASCAS INCLUINDO O EFEITO DA DISTORÇÃO TRANSVERSAL
Neste trabalho apresentamos uma teoria de cascas, que inclue a distorção transversal, em uma formulação compacta, para pequenos deslocamentos e deformações. Desenvolvemos, também, 2 elementos finitos que são: 1) Elemento de Viga (Flexão) ¿ onde utilizamos as seguintes interpolações: quadrática para o desenvolvimento transversal, e linear para a
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 18/08/1983