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Having studied the paper by Mr. T. J. Kotas it is considered that his approach, whilst correct, is far too complicated. All the problems solved can be approached much more simply as follows...
Professor J.W.H. King
The behaviour of concrete blockwork piers with a 1:1:6 mortar mix, under different sustained loads, at constant temperature and humidity is described. An attempt is made to establish a relationship between creep strain in blockwork and the ratio of applied stress to the strength of blockwork.
The effects of residual stresses on the inelastic buckling of rolled, I-section steel beams are studied using a numerical technique to predict the stiffness of the partially yielded section. Both idealized and measured residual stress patterns are employed and a variety of different sections and grades of steel are considered. Some attention is also given to the effect upon inelastic lateral buckling of the type of variation in material properties likely to be encountered in practice. General conclusions regarding the influence of residual stresses on beam buckling are drawn and improvements to Nethercot's simple method for estimating inelastic buckling strength described.