Abstract
A practical method of analyzing a brace under repeated axial force is presented. A closed-form solution has been derived for a bar of ideal I-section with bi-linear stress-strain relationship, and the solution for the elastic-perfectly plastic bar shows good agreement with the exact solution by Nonaka. For a bar of arbitrary solid cross-section with piecewise linear stress-strain relationship, an incremental load-displacement relationship has been obtained in an analytical form. The computed results agrees reasonably well with the experimental results and with detailed finite element solution.
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