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The Structural Engineer

The initial buckling of flat rectangular plates subjected to localized loading is analysed by a simple theoretical method in this paper. It is shown that the buckling loads may be derived as general expressions involving the plate loading and geometric parameters and that when compared with particular values obtained from a computer finite-element solution, they are accurate over a wide range of values of these parameters. M.Z. Khan and A.C. Walker

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Author – Khan, M Z;Walker, A C

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The Structural Engineer

Column curvature curves are used to solve general inelastic beam-column problems in a manner similar to the use of column deflexion curves. Curvature curves are obtained analytically from differential equations while rotation and deflexion are computed by numerical integration of curvature. Three cases of column curvature curves cover all possible cases of elastic-plastic beam-columns. Complete elastic-plastic responses of beam-columns are investigated. Interaction relationships between thrust and end moment for ultimate strength of a beam-column are given. Numerical results are presented for beam-columns with a wide-flange section. W.F. Chen and T. Atsuta

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Author – Chen, W F;Atsuta, T

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The Structural Engineer

I wish to compliment the authors for their very interesting and highly practical paper. Professor Patricio A. Laura

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The Structural Engineer

Mr. A. S. Grimes (F): I welcome the opportunity to discuss the information on this interesting material. Although weathering steel is being used abroad a great deal, it appears to be catching on only very slowly in the UK. As a medium of architectural expression it does seem to offer exciting possibilities, while on the other hand, in the right circumstances, thereare many applications where its totalitarian qualities can also produce considerable economies. I have seen the building in Brussels, which Mr. Godfrey described, where all the external stanchions are exposed to the atmosphere, the only protection being the weathering properties of the steel. As the steelwork was exposed it was essential to detail it with very great care to produce the clean simple lines which the architect wanted. If we use it here in this way we will have to follow the same sort of disciplines.

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The Structural Engineer

The following reports on the performance of candidates in the Part 3 (Membership) examination and in the Technician Test held in January 1972 have been prepared from the reports of the respective examiners and are offered as a guide, both to those who are preparing for future examinations and to those members of the Institution and others responsible for providing appropriate training and experience within the design office. It is hoped, too, that the notes will be of help to lecturers and others in colleges offering courses in preparing for one or other of the Institution's examinations.

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