Category Archives: Newton

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

Elegant Proofs – 1

Posted on 18/05/2008 by dougaj4

Roger Penrose in his book “The Road to Reality” gives a remarkably simple proof of Pythagoras’ Theorem: Drawing a perpendicular to the hypotenuse from the right angle (line CD) will divide any right angled triangle into two similar triangles, both … Continue reading →

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Playing with numbers

Posted on 15/05/2008 by dougaj4

A reader of Melbourne’s Herald-Sun newspaper has posted some data from the Australian Bureau of Meteorology, purporting to show a total lack of climate change, in spite of steadily increasing CO2 concentrations: Where’s the heat   Funily enough, when you … Continue reading →

Posted in Climate, Newton | Tagged , , | 2 Comments

Reinforced Concrete Section Analysis – 2

Posted on 15/05/2008 by dougaj4

Previous Post Pseudo-code for elastic analysis of a layered reinforced concrete section under eccentric axial load and pre-stress load:  Read data ‘For each reinforcement layer: Find area, first moment of area about top ,and depth of centroid. Find total reinforcement … Continue reading →

Posted in Beam Bending, Excel | Tagged , , | 1 Comment