Creep Stresses and Deflections of Columns

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Abstract
A direct method (no iteration is involved) of calculating stresses and deflection of a pin-ended column with creep is shown. The relaxation moment in a particular time interval is treated as an additional initial curvature of the column. This method is applicable to stress-strain-time relationship obtained directly from test data without the necessity of making restrictive assumptions. An illustrative example is shown and the results are compared to those obtained by iteration method (10) and test data. Stress distributions across different sections at different instants are shown. The stress distribution at mid-section deviates considerably from being linear as the creep deflection becomes large.

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