Plane Frames
Mostrando 1-12 de 30 artigos, teses e dissertações.
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1. Optimal design of beam-column connections of plane steel frames using the component method
Abstract This paper presents a methodology for optimization of beam-column connections of plane steel frames. The objective is to obtain beam- column connections mechanically more efficient and with minimum cost by determination of the optimal dimensions for the components of the connection; satisfying mechanical constraints associated with the bending momen
Lat. Am. j. solids struct.. Publicado em: 29/10/2018
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2. Structural reliability analysis of steel plane frames with semi-rigid connections
Abstract The design codes for structural design traditionally establish the adoption of partial safety factors to deal with uncertainties. These standards do not allow one to know the real probabilities of failure of a structure. What is needed, from a practical and scientific point of view, is a more consistent approach, based on reliability theory. This ar
REM, Int. Eng. J.. Publicado em: 2018-07
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3. Development of Sliding Connections for Structural Analysis by a Total Lagrangian FEM Formulation
Abstract In this study a total lagrangian 2D finite element formulation is used to model plane frames developing large displacements and rotations considering sliding connections. This kind of connections is usually called prismatic and cylindrical joints. In order to be self-containing, the steps of the development of a frame finite element of any approxima
Lat. Am. j. solids struct.. Publicado em: 2016-11
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4. Physical and geometrical non-linear analysis of plane frames considering elastoplastic semi-rigid connections by the positional FEM
This study presents an alternative Finite Element formulation based on positions to model plane frames considering geometrical non-linear and elastoplastic behavior for members and semi-rigid connections. The formulation includes shear effects and allows the consideration of important mechanical behavior of structures in design decisions and verifications. T
Lat. Am. j. solids struct.. Publicado em: 2014-12
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5. General exact harmonic analysis of in-plane timoshenko beam structures
The exact solution for the problem of damped, steady state response, of in-plane Timoshenko frames subjected to harmonically time varying external forces is here described. The solution is obtained by using the classical dynamic stiffness matrix (DSM), which is non-linear and transcendental in respect to the excitation frequency, and by performing the harmon
Lat. Am. j. solids struct.. Publicado em: 2014
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6. Análise não linear geométrica de pórticos planos considerando ligações semirrígidas elastoplásticas / Geometric nonlinear analysis of plane frames considering elastoplastic semi-rigid connections
Neste trabalho foi implementada uma técnica para considerar ligações semirrígidas elastoplásticas para a análise não linear geométrica de pórticos planos. As ligações semirrígidas foram consideradas com o comportamento elastoplástico multilinear e modeladas via o Método dos Elementos Finitos (MEF). Esta técnica foi acoplada ao programa AcadFra
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 22/06/2012
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7. Análise não-linear física simplificada de estruturas de contraventamento de edifícios de alvenaria estrutural / Simplified physical non-linear analysis on shear wall masonry buildings
Neste trabalho são discutidos os aspectos referentes à análise não-linear física de painéis de contraventamento em alvenaria estrutural. O objetivo foi a obtenção de coeficientes a serem aplicados ao produto de rigidez à flexão (EI) para a consideração da não-linearidade física de forma simplificada. As estruturas foram analisadas de forma para
Publicado em: 2010
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8. Protocolo clínico para avaliação de ajustes posturais antecipatórios: desenvolvimento e validação / Clinical protocol for assessment of anticipatory postural adjustments: development and validation
Evaluating motor control is a recurrent practice in physiotherapeutic routine, in which physiotherapist analyzes anticipatory postural adjustments (APAs) and compensatory postural adjustments (CPAs). APAs, subject of interest, precede planned postural perturbation and minimized them through corrections to maintaining the stability. It is known the relationsh
Publicado em: 2010
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9. Elastic nonlinear geometric analysis with positional finite element method / Análise de problemas elásticos não lineares geométricos empregando o método dos elementos finitos posicional
Non linear geometric analysis for 2D frames and 3D solids are analyzed in this work by employing the finite element method with positional description. The present formulation does not use the concept of displacement; it considers positions as the real variables of the problem. In addition, the formulation is developed through total lagrangian description. B
Publicado em: 2008
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10. RELIABILITY-BASED DESIGN OPTIMIZATION OF REINFORCED CONCRETE PLANE FRAMES / PROJETO ÓTIMO BASEADO EM CONFIABILIDADE DE PÓRTICOS PLANOS DE CONCRETO ARMADO
This work compares the Deterministic Design Optimization (DDO) with the Reliability-Based Design Optimization (RBDO) of reinforced concrete plane frames. The structure is modeled by a finite element mesh using bar elements and considering both geometric and material nonlinearities. In the formulation of the proposed optimization problem the design variables
Publicado em: 2008
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11. Um modelo geometricamente exato de barras com grandes deformações, que considera a distorção e o empenamento geral da seção transversal, e sua discretização pelo método dos elementos finitos. / A fully nonlinear geometrically exact multi-parameter rod model that incorporates general in-plane and out-of-plane cross-sectional changes, and its discretization by Finite Element Method.
The main purpose of this work is to present a fully nonlinear geometrically-exact multi-parameter rod model that incorporates general in-plane cross-sectional changes as well as general out-of-plane cross-sectional warping. The formulation constitutes an extension of the earlier works presented in [1] to [6], [8] and [9], in the sense that the restrictions t
Publicado em: 2008
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12. MODELOS DISCRETIZADOS DE DIMENSÃO REDUZIDA PARA ANÁLISE DINÂMICA NÃO-LINEAR DE VIGAS E PÓRTICOS PLANOS / LOW-DIMENSIONAL REDUCED ORDER MODELS FOR THE NONLINEAR DYNAMIC ANALYSIS OF BEAMS AND PLANE FRAMES
Um dos resultados fundamentais na mecânica clássica é que, para sistemas lineares com n graus de liberdade, existem n modos de vibração ortogonais e que as freqüências naturais são independentes da amplitude de vibração. Além disso, qualquer movimento da estrutura pode ser obtido como uma combinação linear desses modos. No caso de sistemas não-
Publicado em: 2007