Category Archives: Arch structures

Update to Publications

Posted on 02/10/2009 by dougaj4

I have (at long last) updated my list of publications (all downloadable). Click on the link below to visit the site, or download direct from the list here. My Publications Here is the current list:     Predicting the Deflection … Continue reading →

Posted in Arch structures, Concrete, Geotechnical Engineering, Newton | Tagged , , , , | Leave a comment

A catenary function

Posted on 25/06/2009 by dougaj4

Following on from the previous post, here is an Excel User Defined Function (UDF) to calculate the coordinates of any specified catenary, with the option of also finding the tension force at any point. Download from: Catenary.zip The download file … Continue reading →

Posted in Arch structures, Excel, Maths, Newton, UDFs, VBA | 3 Comments

Elegant proofs 4 – The optimum shape of an arch

Posted on 16/06/2009 by dougaj4

Large span arch structures have been constructed for well over two thousand years, but the first recorded analytical treatment was given by Robert Hooke in 1675 who at the end of his treatise on helioscopes added the following statement “to … Continue reading →

Posted in Arch structures, Newton | 10 Comments

Another old bridge, and some newer ones

Posted on 07/12/2008 by dougaj4

A further collection of notable bridges from Southern Germany and Austria. Würzburg’s Old Main Bridge (Alte Mainbrücke) was built 1473–1543 to replace the destroyed Romanesque bridge from 1133. It was adorned from 1730 on in two phases with well-known statues … Continue reading →

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Bridges of NSW

Posted on 02/11/2008 by dougaj4

An excellent and detailed account of historical bridges in New South Wales: Bridge Types in NSW Historical Overviews

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