Issue 9

The paper describes the design of two flyovers, and their associated structures that have been constructed close to the Mersey Tunnel in Liverpool. P.A. Brown, V.J. Davies and L.H. Lewis

Dr. D. Robak: As one closely connected with the design of the hangar, from the initial discussion with the user to the day of its final completion, I would like to enlarge on the reasons why the scheme described by Mr. Taylor was finally adopted.

Mr. G. Mould: When completed, the tower block at Guy’s Hospital will be an extraordinary building, not because it incorporates any sensational new structural concepts nor because it is a particularly bizarre piece of architecture. This is the first time that a 32 storey hospital has been produced in this country, and there are few abroad either. I have not tried to present a highly technical description of the structural design of a highrise building, but I have emphasized the structural engineer’s contribution, as part of a team, to meeting the accommodation requirements of a very wide crosssection of the medical profession, and at the same time meeting the physical requirements of the planning authorities.

The influence of column stiffness, damping and foundation interaction on the earthquake response of multi-storey shear buildings is analysed. Using Ramberg-Osgood and bilinear formulations, the moment-curvature and shear-deflexion relationships for the columns are computed, based on the general nonlinear inelastic stress-strain relationships which include the hysteretic loops and strain hardening range. It is found that damping can sometimes prevent buildings from going into inelastic deformation. The decrease in column stiffness causes a decrease in the natural frequency of the building but increases the amplitudes of the forced vibrations. Avinash Singhal

The following Institution report was recently approved by the Council and has been forwarded to the Department of the Environment as a basis for further discussions.

The paper describes a simplified method of analysing cylindrical shells with a view to reducing numerical work to a minimum by using a set of design tables and solving only four boundary constants at a time.

Mr. W. G. N. Geddes, BSc, CEng, FIStructE, FICE, FIWE, FIES, has the distinction of being the first Scot to serve as President of the Institution while actually domiciled in Scotland. Taking ofice on 7 October next, Mr. Geddes will deliver his Presidential Address at an Ordinary Meeting at 6 pm that evening at 11 Upper Belgrave Street, London.