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The Structural Engineer

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

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The Structural Engineer

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. D. Lenczner

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The Structural Engineer

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. D.A. Nethercot

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The Structural Engineer

The Martigues Viaduct was begun in 1969 and came into operation in June 1972. It is 874 m in length and consists of a central metal structure framed by two access viaducts in prestressed concrete. The reasons why a bridge was considered necessary are given, followed by details of its construction. Claude Poirson

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The Structural Engineer

The strength of a concrete member subjected to torsion will be governed by the tensile strength of the concrete. The author has collected all the experimental data available on concrete in torsion and shows that the results agree reasonably well with this statement if the split cylinder strength is taken as the tensile strength of the concrete. W.T. Marshall

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