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Article
Publication date: 1 February 1990

A. Bouberguig

Many problems are identified in the static analysis of a building based on ‘slabs, walls, columns’ by the classical method consisting of isolating the corresponding slab at each…

51

Abstract

Many problems are identified in the static analysis of a building based on ‘slabs, walls, columns’ by the classical method consisting of isolating the corresponding slab at each level and of subdividing it into finite elements by replacing walls and columns by localized fixed bearing points. Better adapted methods are indicated, particularly modelling the whole structure using ‘shell’ elements. A specially developed ‘slab, wall, column’ model is defined based on simplifying hypotheses which break down the effects of horizontal and vertical loads. The scope is precisely outlined and practical examples are given integrating the soil‐structure interaction and the placing of prestressing.

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Engineering Computations, vol. 7 no. 2
Type: Research Article
ISSN: 0264-4401

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Article
Publication date: 1 February 1990

C. Majorana, A. Natali and R. Vitaliani

The aim of the present work is to describe a numerical approach to the analysis of three‐dimensional reinforced concrete structures subject to prestressing. The finite element…

58

Abstract

The aim of the present work is to describe a numerical approach to the analysis of three‐dimensional reinforced concrete structures subject to prestressing. The finite element approach developed is described, with particular regard to the configuration of finite elements in relation to numerical model generation. An elasto‐viscoplastic material law is adopted. The non‐linear formulation is discussed, pointing out theoretical and numerical aspects. The computational examples, carried out using a specially developed code, aim at illustrating the characteristic aspects of the proposed approach.

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Engineering Computations, vol. 7 no. 2
Type: Research Article
ISSN: 0264-4401

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Article
Publication date: 1 February 1986

E. Hinton and H.C. Huang

Finite elements based on Mindlin plate theory are used to study the distribution of shear forces and twisting moments on the boundaries of plates with various support conditons…

189

Abstract

Finite elements based on Mindlin plate theory are used to study the distribution of shear forces and twisting moments on the boundaries of plates with various support conditons and thickness‐to‐span ratios. Differences between results obtained using Mindlin and Kirchhoff plate theories are highlighted. Potential difficulties in the interpretation of results obtained from finite element analysis are discussed and appropriate shear force sampling procedures are reviewed. The present work is a pilot study for a larger project with the basic aim of providing engineers with an unambiguous method for obtaining stress resultants in Mindlin plate analysis. Some examples are presented which illustrate the excellent results which may be obtained with judicious mesh division even in regions with steep gradients of the stress resultants near plate corners. These examples also demonstrate some of the difficulties facing engineers who have to try to interpret finite element results for plates.

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Engineering Computations, vol. 3 no. 2
Type: Research Article
ISSN: 0264-4401

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Article
Publication date: 1 May 1995

L. Jiang and M.W. Chernuka

A stiffened shell element is presented for geometricallynon‐linear analysis of eccentrically stiffened shell structures.Modelling with this element is more accurate than with the…

93

Abstract

A stiffened shell element is presented for geometrically non‐linear analysis of eccentrically stiffened shell structures. Modelling with this element is more accurate than with the traditional equivalent orthotropic plate element or with lumping stiffeners. In addition, mesh generation is easier than with the conventional finite element approach where the shell and beam elements are combined explicitly to represent stiffened structures. In the present non‐linear finite element procedure, the tangent stiffness matrix is derived using the updated Lagrangian formulation and the element strains, stresses, and internal force vectors are updated employing a corotational approach. The non‐vectorial characteristic of large rotations is taken into account. This stiffened shell element formulation is ideally suited for implementation into existing linear finite element programs and its accuracy and effectiveness have been demonstrated in several numerical examples.

Details

Engineering Computations, vol. 12 no. 5
Type: Research Article
ISSN: 0264-4401

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