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The Structural Engineer, Volume 70, Issue 23, 1992
Reinforced concrete columns are now often designed by computer, but design charts are still a popular alternative. Many sets of charts have been published for different Codes of Practice over the years, by various authors, but most of those for rectangular columns (e.g. BS81lO:Part 3' and the IStructE manual²) cover only columns that are reinforced with four bars placed near their corners. A.N. Beal and F.N. Pannell
A series of experiments has been carried out in a purpose-built sand tank to assess the foundation/sand behaviour under load where the investigation is confined to the non-failure characteristics of the soil. The semi-full-scale foundation is of bolted steel box construction, instrumented to provide the contact stresses at selected points. Stresses and displacements are also measured automatically at various depths in the sand, using a dedicated computer system with a specially developed management suite of programs. The variation of displacements and stresses, once processed, are plotted against depth. The results are then compared with data from linear finite element method, using back-analysis techniques. Various parameters are then established and ascertained. R. Delpak, G.O. Rowlands and A. Siraty
Conventional limestone concrete airfield pavements are prone to spalling as a result of jetblast from vertical takeoff and landing aircraft. This paper describes a collaborative research programme aimed at developing jetblast-resistant pavement quality concretes incorporating alternative cementitious materials and aggregates. Ten alternative mixes were evaluated by subjecting slabs to simulated Harrier jet-engine blast on the ground erosion test facility at British Aerospace, Warton. S.A. Austin, P.J. Robins and M.R. Richards