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The Structural Engineer, Volume 64, Issue 6, 1986
Will she float? A new subject for the column has been brought forward in a letter from Mr A. L. Gilbertson writing from Epsom. At a recent Institution of Civil Engineers meeting to discuss Part 3 of the draft British Standard for maritime structures, there was a lively debate on the factor of safety that should be required against flotation. There were three aspects to consider: - an unforeseen rise in the water table - underprovision of self-weight due to low density or updersized members - a minimum margin of safety (per se) Verulam
The new edition of the Buildings Regulations became effective on 11 November 1985, with BS 8110 receiving ‘approved document’ status. We have, of course, long awaited the publication of the revision to CP 110:1972 and following several false alarms (notably, one in 1982, two or three in 1983, and even more in 1984) we were delivered of the new issue in September 1985. R. Wayment
This paper presents a comprehensive review of the use of steel fibre concrete for bridge decks and building floor slabs. The data shown cover both normal weight and lightweight concrete incorporating steel fibres. Emphasis is given to the mix proportioning of these two concretes to produce workable and compactable mixes without causing fibre bundling, segregation or bleeding. Both material and engineering properties of steel fibre concrete are then discussed in relation to their use in bridge decks and building floors. The structural behaviour of conventional reinforced concrete slabs containing steel fibres is then presented, with particular reference to deformation, cracking, service loads, and failure behaviour. The significant advantages of fibre concrete in structural members are highlighted. It is shown that durability of steel fibre need no longer pose a threat to their use in concrete structures. R.N. Swamy