1 September 2015
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Past President of The Institution of Structural Engineers, Michael Dickson, concludes his review of the inspirational career of the German architect, Frei Otto. In this second part, Dickson discusses Otto’s later work – particularly projects in the Middle East and designs with low embodied carbon.
David Edwards argues that the serviceability limit state for runway beams should be considered to be slope, not deflection, meaning that current limitations are overly conservative in most cases.
The ‘Wood and Armer’ equations are well established as a means of accounting for torsional moments in bridge slabs. In this article, a potential source of misinterpretation of the original equations is identified and corrected. The misinterpretation is shown not to have significant implications for design, but may be of consequence where the Wood and Armer equations have been used for assessment. A number of other inconsistencies are identified and a revised set of equations is proposed.