Category Archives: Newton

The roof of the Taq-i-Kisra; Analysis

Posted on 10/06/2008 by dougaj4

Following the previous post, I have compared the stresses in the Taq-i-Kisra assuming either a catenary or parabolic profile. I have also compared constant depth sections with sections increasing in depth towards the supports. The arch span was taken as … Continue reading →

Posted in Arch structures, Finite Element Analysis, Maths, Newton | Tagged , , , , , | 2 Comments

The Roof of the Taq-i-Kisra

Posted on 08/06/2008 by dougaj4

A higher resolution image, from a slightly different viewpoint The roof of the Persian Throne Room of the Taq-i-Kisra, now in Iraq, is the best surviving example of an ancient large span structure built to a catenary profile, the shape that … Continue reading →

Posted in Newton | Tagged , | 7 Comments

Lane Cove Tunnel, Eastern Portal; during construction

Posted on 05/06/2008 by dougaj4

13th July 2006. Click on thumbnail, then click on image to see full size.

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Reinforced Concrete Section Analysis – 3

Posted on 30/05/2008 by dougaj4

Previous post -1 Previous post -2 The theory presented in the previous 2 posts in this series has been incorporated into an Excel UDF, allowing concrete and reinforcement stresses and strains to be evaluated quickly and easily for reinforced and … Continue reading →

Posted in Beam Bending, Excel, Newton, UDFs | Tagged , , , , , , , , | 8 Comments

The Dome of the Pantheon

Posted on 24/05/2008 by dougaj4

I have recently made my first Wikipedia edit. The article on the Pantheon in Rome made the following claim: “The exact composition of the Roman concrete used in the dome remains a mystery. An unreinforced dome in these proportions made of … Continue reading →

Posted in Concrete, Newton | Tagged , , , | 7 Comments