Inelastic Structural Behavior Research Articles

Evaluation of Solution Procedures for Material and/or Geometrically Nonlinear Structural Analysis

This paper presents an assessment of the solution procedures available for the analysis of inelastic and/or large deflection structural behavior. A literature survey is given which summarizes the contribution of other researchers in the analysis of structural problems exhibiting material nonlinearities and combined geometric-material nonlinearities. Attention is focused at evaluating the available computational and solution techniques. Each of the solution techniques is developed from a common equation of equilibrium in terms of pseudo forces. The solution procedures are applied to circular plates and shells of revolution in an attempt to compare and evaluate each with respect to computational accuracy, economy, and efficiency. Based on the numerical studies, observations and comments are made with regard to the accuracy and economy of each solution technique.

Inelastic torsional behaviour of structures designed to ECS

Some typical examples of the elastic torsional response of buildings designed to Eurocode ECS are presented, and the inelastic response of these structures to certain characteristic strong-motion earthquakes is then investigated. The non-linear hysteretic behaviour caused by yielding of the resisting elements in asymmetric buildings influences the torsionally coupled response and triggers behaviour different from that predicted by linear elastic theory. As current code analysis procedures for seismic design, including most major building codes around the world, are based largely on linear (or equivalent linear) elastic theory, it is important to assess the effect of such changes in response behaviour on the design efficiency. The results presented in this paper are used as a basis for comment on the question of extrapolating elastic torsional design procedures to the inelastic range, and to assist in identifying the limitations of this simplistic approach.

The Pressure Line and the Inelastic Buckling of Columns

Pressure line concept developed for elastic arches and rigid frames and for inelastic deformations of structural elements in length is applicable to studies of inelastic behavior of columns and of rigid frames; concept is extended for inelastic behavior of such structures and for eccentrically and laterally loaded columns.

The Minimum Weight Design of Wings for Flutter Conditions

1 Freudenthal, A. M., Some Time Effects in Structural Analysis, Report 6th International Congress for Applied Mechanics, Paris, 1946. 2 Freudenthal, A. M., The Inelastic Behavior of Engineering Materials and Structures, p. 518; John Wiley & Sons, Inc., New York, 1950. 3 Rosenthal, D., and Baer, H. W., An Elementary Theory of Creep Buckling of Columns, Proceedings of the First U.S. National Congress of Applied Mechanics, Chicago, June 11-16, 1951; Edwards Bros. Inc., Ann Arbor, Mich., 1952. * Libove, Charles, Creep Buckling of Columns, Journal of the Aeronautical Sciences, Vol. 19, No. 7, p. 459, July, 1952. 5 Hilton, Harry H., Creep Collapse of Viscoelastic Columns with Initial Curvature, Journal of the Aeronautical Sciences, Vol. 19, No. 12, p. 844, December, 1952.