Author: Hook, D M A;Richmond, B
First published: N/A
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Hook, D M A;Richmond, B
The general theory of beams curved in plan with torsional restraint at the supports is explained, with particular reference to prestress loading. It is proved that the torsional moments due to prestress loading are solely dependent on the support bending moments, and the conditions of concordancy are formulated for a circularly curved beam.
It is suggested that for most practical cases the support bending moments in circularly curved beams can be calculated to sufficient accuracy assuming the beam is
straight, and the order of accuracy is given. A similar approximation can also be made when analysing the effects of loads other than prestress.
R.J. Garrett and R.A. Cochrane
Analytical and experimental studies have been carried out at Imperial College into various aspects of limit state design when applied to highway bridges. To obtain an indication of the inherent load factors against the various appropriate limit states, three typical bridges were theoretically investigated. The predicted load factors were compared with those proposed for use with new design procedures.
Dr. A.R. Flint and L.S. Edwards
The Minister of Housing and Local Government formally laid before Parliament on 5 February the Building (Fifth Amendment) Regulations 1970. These regulations, if approved, will come into operation on 1 April 1970 but will not apply to work that was: (a) completed before the date of the coming into operation of these regulations; or (b) completed after that date in accordance with plans deposited with the local authority before that date, with or without any departure or deviation from those plans.