Abstract
Results of recent torsion tests on steel I-sections have shown that the member's torsional rigidity may be of the order of 60 per cent higher than the value given by simple theory and further that these measured values possess considerable scatter. This paper presents an explanation of these points in terms of the residual stresses present in the section. From the results of a study of a number of sections, a simple formula, based on only one geometrical parameter, is proposed for calculating correction factors to be applied to the value of the torsional rigidity as determined by conventional methods.
Published Version
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