New impact statement published in Structures

Published: 12/10/2017

Read the latest impact statement in Structures in which Professor Chris Burgoyne (University of Cambridge) and Owen Mitchell (Mott MacDonald) introduce their paper on ‘Prestressing in Coventry Cathedral’.

The problems of corrosion in prestressing tendons in other structures built in the 1960s led the cathedral authorities to seek more information about their building. This led to a study of the cathedral to identify the locations of the prestressing tendons, which are mainly in the roof structure.

In the statement the authors point out that despite some local water penetration, there is no current evidence of corrosion in the tendons. They go on to ask what would happen to the structure if corrosion were to take place at any time in the future. It was concluded that, because the principal prestressed elements are grouted tension ties in the roof trusses, there would be little outward evidence of ongoing corrosion, individual wire breakage or warning of impending failure.

In order to successfully determine the progress of any future degradation in structural performance, replaceable structural health monitoring systems need to be developed that could measure a few microstrain over short gauge lengths, in perpetuity, all along the prestressed elements.

Read the impact statement in full on the Structures website.

Impact statements are intended to encourage practising engineers to read relevant papers published in Structures.

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