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Hinge formation in the presence of local crushing is studied in the context of limit state masonry arch mechanisms. Empirical constitutive modelling is developed to produce a range of corresponding axial force/bending moment interaction diagrams appertaining to rectangular masonry sections subject to singly-eccentric compressive normal loading, and these archetypal design charts are assessed against experimental data. It is considered that masonry hinges are of distinctly brittle form, rotation becoming significant only as hinge resistance decays. Preliminary arch bridge case-studies serve to encourage confidence in the brittle hinge model, and serviceability factors are also considered.
N. Taylor and P, Mallinder
In February 1988 the City of Barcelona held an invited competition for the design of a new telecommunications tower. They asked for the tower to be a ‘monumental technological element.. . to enhance the image of Barcelona in the context of the 1992 Olympics’. The magnificent site overlooks the city from a height of 440 m above sea level. The new tower is called the Torre de Collserola, after the mountain on which it stands.
By April next year it should be possible to design timber structures using EC5 instead of BS 5268:Part 2; within about 6 years BS 5268 could be withdrawn and all timber design would then be based on EC5. What would be the advantages of changing to the new Code as soon as it is published?