Instability Analysis of Eccentrically Loaded Concrete Walls

In this paper, a computer-based numerical technique for the prediction of the instability load length of concrete walls is developed. The wall is treated as a beam-column and is generally subjected to axial force and two end moments. A wall strip is treated here as a plane-strain problem. Any materi...

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Bibliographic Details
Published in:Journal of structural engineering (New York, N.Y.) N.Y.), 1990-10, Vol.116 (10), p.2862-2880
Main Authors: El-Metwally, Salah E, Ashour, F, Chen, W. F
Format: Article
Language:English
Subjects:
Applied sciences
Building structure
Buildings. Public works
Construction (buildings and works)
Exact sciences and technology
Reinforced concrete structure
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Summary:In this paper, a computer-based numerical technique for the prediction of the instability load length of concrete walls is developed. The wall is treated as a beam-column and is generally subjected to axial force and two end moments. A wall strip is treated here as a plane-strain problem. Any material models of concrete exhibiting different behaviors in compression and in tension can be implemented in this analysis procedure. The load-deflection curves with both the ascending and descending branches are predicted by a new numerical technique based essentially on the Newmark method combined with the concept of equivalent column for computing the instability load of the beam-column. It is found that for concrete walls within the usual slenderness ratios, material failure prevails and their load-carrying capacities are very sensitive to a small change in end eccentricities.
ISSN:0733-9445
1943-541X
DOI:10.1061/(ASCE)0733-9445(1990)116:10(2862)