Author: Morgan, L
First published: N/A
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The paper contains the results of an investigation into the elastic critical loads of multi-bay pitched roof portal frames using an electronic digital computer. The variables considered are:
(a) The number of bays.
(b) The ratio Span / Stanchion height
(c) The angle of inclination of the rafters.
(d) The ratio Inertia of Stanchion / Inertia of Rafter
(e) The end fixity of the internal stanchions.
D. M. Brotton
The generalised slope-deflection method of structural analysis is now quite well-known and is particularly suitable for the electronic computer solution of rigid jointed frameworks. It was used for the analysis of plane frameworks by Livesley,who went on to
develop his basic computer programme to include for automatic design and elastic instability. There is no theoretical difficulty in extending the method for the elastic analysis of any space structure, with the following variations allowed in the members, if applicable:-
(i) variable sections,
(ii) curved or bent centre-lines,
(iii) rigid, pinned or elastically-restrained connections.
It is also possible to include for the effects of:-
(iv) shearing, twisting, axial and bending deformations
(v) elastic supports along the lengths of members,
(vi) force, moment and torque loadings,
(vii) settlements and temperature changes.
E. Lightfoot and F. Sawko
Though the ‘concrete industry’ has no distinct entity except in certain specialized aspects, the term is a useful one in describing those parts of the work of various professions and industries that involve the use of Portland cement. It is also appropriate for the purpose of this paper in that the research organization of the Cement and Concrete Association, though financed by the cement manufacturing industry,
is in fact Concerned almost entirely with providing help to the cement user.
A. R. Collins