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Showing 1 to 20 of 160 for “"Placas"”.
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Comportamento de placas compostas
The composite slabs are a practical and economic system which can be largely used. The aim of this work was to study the behaviour of composite concrete slabs with steel deck provide with shear connectors formed by steel bars welded on their rib tops. Besides the results of the tests of this work, …
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Flexão térmica das placas
The thermal bending of the plates with thin thickness subjected to a stationary thermal field T = T (x,y,z) is analysed by the ordinary finite difference method. The analysis is restricted to the small deflections theory and interactions between the bending and the membrane forces effects are …
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MESETARIO: Trama Multiescalar de placas circulatorias
El modelo territorial parte desde la formación de mesetas de la selva frondosa altimétrica de El Dorado, Misiones. Construye una estructura de mesetas que itera sus composición interna de valles y lomas que se fractalizan y corrugan, estratificando el territorio. Las iteraciones de mesetas que …
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Cálculo de placas com ângulos reentrantes
This paper aims to determine an adequate orientation in the design of plates with re-entrant angles, with various boundary conditions, which were made of reinforced concrete. A study made of the relation of the sides in the general behaviour of the efforts, and examples of plates with variable …
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Bifurcação secundária instável em placas retangulares
The non-linear elastic behaviour in thin flat plates under the effects of initial imperfections and coupled modes is analysed in the presented work. Through this analysis it is detected, along the imperfect fundamental equilibrium path, secondary points of bifurcation which may be stable or …
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Método das equivalências aplicado a placas esconsas
The purpose of this work is to obtain comparative results by the numerical methods of equivalences, finite differences and finite elements, applied to several cases of skew plates with built in edges. Convergence towards the analytic solution has been examinated for different skew angles, and a …
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Análise de placas circulares sobre base elástica
The subgrade reaction method and that of the rigidity modulus were applied in order to calculate the model foundation plate, built in acrilic and supported on a sandy foundation very carefully mounted. Comparing the theoretical resulta with the ones experimentally reached, we can define, in this …
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Estudo de placas e chapas retangulares com orifícios
The present subject has as an object to study the bending of thin plates and the problem of multiple connection in slabs, that is explained in the particular case such as: 1) Thin rectangular plates of constant thickness clamped and simply supported at the external edges, with a central hole and …
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Vibrações de placas sandwich enrijecidas por barras conectoras
Analysis of the free transverse vibration equations of retangular sandwich-type plates including spaced transverse posts between the faces which introduce additional stiffness in the core, under compressive uniforme load acting in the midplane, as well as the determination of the critical loads by …
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Análise dinâmica de placas sandwich comprimidas simplesmente apoiadas
The scope of this dissertation is the analysis of the dynamical behavior of sandwich plates. We have considered only simply supported rectangular plates under a compressive uniform load acting in the middle plane. The dynamical instability was also analyzed. The equations of motion were obtained …
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Análise de placas circulares com ortotropia física ou geométrica
In the former, the plate has uniform thickness and its material has different elastic properties in the radial and circunferential directions; in the latter, the isotropic plate is stiffenned with uniformily spaced radial and circunferential ribs. For each case, the equilibrium differential …
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Estudo comparativo de análise numérica aplicada a placas esconsas
The purpose of this work is the development of study of two numerical methods, the finite difference and the finite element method, as applied to the calculation of simply supported skew plates. Convergence towards the analytic solution has been examined for different skew angles, and computed the …
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Análise dinâmica de placas pelo método dos elementos finitos
The main purpose of the present work is to study the dynamic behavior of plates under specified time-varying loads and moving forces. Initially a brief exposition of the variational formulation concerning the dynamics of thin plates is presented and the finite element method is applied to this …
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Modelo de optimización de la producción de placas de celulosa
… para una empresa familiar que produce placas de celulosa, un componente esencial en sistemas de enfriamiento evaporativo. El modelo mejora la eficiencia y aborda problemas como la falta de planificación de inventario y la digitalización de datos. El análisis de datos históricos de …
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Reconhecimento de caracteres alfanuméricos de placas em imagens de veículos
… por diferentes grupos é a leitura automática de placas de matrículas como forma de detectar transgressores, encontrar carros roubados ou efetuar estudos de origem/destino [BAR99]. Com o constante crescimento do volume de tráfego de automóvel e a limitada capacidade dos sensores convencionais, …
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Calculo de esfuerzos en placas planas sometidas a flujo turbulento
The objective of this work is the determination of the response of a rough, simply supported, rectangular plate excited by a turbulent boundary layer. A general solution has been found for the displacement response of any randomly excited continuos linear system. The method of solution makes use of …
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Ensaios, "in situ", de resistência ao arrancamento de placas horizontais reduzidas
This report presents the results of a set of in situ tests with small depth, circular plates, buried at shallow embedment, searching for the influence of the diameter and dept of the plate and diameter of the pit on the uplift load carrying capacity. It was also aimed to test the feasibility of …
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Elementos finitos para flexão de placas com campo de tensões assumido
The development of two Hybrid Pian's formulation of the finite element method based on assumed stress distribution and applicable to plate-bending problem is presented. The former makes use of Reissner's theory for bending of "moderately thick" plates and the latter is based on the customary theory …
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