Author: Ashton, L A
First published: N/A
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Ashton, L A
Firstly, the method of influence coefficients is applied to the analysis of any number of parallel arches, identical in their centre lines and having any number of transversals connected across them, with normal and tangential reactions occurring at each intersection. Next, it is proved that any loaded, symmetrical arch can be replaced by an equivalent straight beam with a certain modified loading. It is then explained how an interconnected encastré arch system can be solved by using this theory together with a quasi-slab analysis or by the ‘continuous-strip transversals’ method. Finally, results from this approach (most of which is already familiar to beam and slab bridge designers) are compared with those from influence coefficients and from experiments on a model arch system.
E. Lightfoot and V.K. Datta
Defining the variation of soil pressure in a general manner to cover the variation from the purely cohesive to the purely cohesionless states the upper and lower bounds are determined for the load carrying capacity of an edge-loaded rectangular foundation
slab. The results are plotted for a wide range of geometrical and soil pressure parameters. A procedure for applying the results to the case of orthotropy is also indicated.
D.V. Reddy and E.L. Murphree
An informal discussion on ‘ What is the responsibility of the structural engineer? ’ replaces the open discussion on the Joint Institution/Concrete Society’s Report on Reinforced Concrete Detailing which appears in the sessional programme for 11 January. It is expected that the Reinforced Concrete Detailing Report will now be published within the next few weeks and the open discussion upon its recommendations will be held when members have had an opportunity of digesting them.