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Author Archives: dougaj4
Reinforced Concrete Section Analysis – 4
Previous post The spreadsheet presented in the previous post in this series uses the basic equation given below to find the location of the neutral axis: For a cross section with any applied axial load at eccentricity e, measured from … Continue reading
Posted in Beam Bending, Excel, Newton, UDFs, Uncategorized
Tagged Polynomial, Reinforced Concrete, Section Analysis, UDF, VBA
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Importing text files with VBA – 2
Previous post The text file import routines and functions presented in the previous post have been modified with the following additions: Lines of text can be split into separate cells, at any designated character (e.g. a coma or a space) … Continue reading
The roof of the Taq-i-Kisra; Analysis
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 analysis, arch, Catenary, finite elemnt analysis, parabola, Taq-i-Kisra
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The Roof of the Taq-i-Kisra
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
Lane Cove Tunnel, Eastern Portal; during construction
13th July 2006. Click on thumbnail, then click on image to see full size.
