Category Archives: Newton

Reinforced Concrete Section Analysis – 1

Posted on 25/03/2008 by dougaj4

Increased yield strengths of reinforcing steels have increased the importance of the Serviceability Limit State in reinforced concrete design, with SLS reinforcement stresses, crack widths, or deflections often controlling the design. Elastic analysis of a rectangular section under pure bending can … Continue reading →

Posted in Beam Bending, Newton | 4 Comments

Section Properties of Defined Shapes – Spreadsheet

Posted on 25/03/2008 by dougaj4

Download section properties spreadsheet from: http://www.interactiveds.com.au/software/Section%20Properties03.zip http://www.interactiveds.com.au/software/Section%20Properties07.zip Section properties for 35 defined shapes Section properties from coordinates Section properties UDF Screen shots:

Posted in Excel, Maths, UDFs | Tagged | 29 Comments

Section Properties from Layers

Posted on 19/03/2008 by dougaj4

An alternative to finding the section properties of irregular polygons from the coordinates of the corners is to divide the shape into rectangular or trapezoidal layers.  The properties of the shape may then be found by simply summing the properties … Continue reading →

Posted in Maths, Newton, Uncategorized | Tagged , , , , | 1 Comment

Section Properties from Coordinates

Posted on 09/03/2008 by dougaj4

The area of irregular closed polygons defined by coordinates may be conveniently calculated by summing the areas of adjacent trapeziums, as shown below.   The area of each trapezium is calculated from the X axis.  Note that with the apex coordinates … Continue reading →

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

Alice Through the Looking Glass, or How to Shake Hands With an Alien

Posted on 01/03/2008 by dougaj4

An interesting article on the handedness of amino acids: Mirror, Mirror « Girl Meets Science and a somewhat tenuously linked discussion about how to describe left/right to an alien: http://www2b.abc.net.au/science/k2/stn/newposts/3400/topic3400503.shtm

Posted in Newton | 1 Comment