Category Archives: Excel

Solving the Lagrangian Point equation for the Moon

Posted on June 23, 2019 by

This post was prompted by a recent question at Fitting high order polynomials, asking for Excel methods to solve the equations for the radius of the Moon’s Lagrangian Point 1. All the methods described in this post have been added to … Continue reading →

Posted in Excel, Maths, Newton, UDFs, VBA | Tagged , , , , , , | 3 Comments

ULS design of circular reinforced concrete columns

Posted on June 9, 2019 by

The RC Design Functions spreadsheet has been updated (to Version 8.04) with the addition of a CircU function for ULS design of circular reinforced concrete sections under combined bending and axial load.  The new version, including full open-source code, may … Continue reading →

Posted in Beam Bending, Concrete, Excel, Newton, UDFs, VBA | Tagged , , , , , , , , , , , , , | Leave a comment

ULS Design Functions – update for AS 3600

Posted on May 28, 2019 by

The ULS Design Functions spreadsheet (last posted here) has been updated to the new Australian Standard for concrete structures; AS 3600-2018.  The new version can be downloaded from: ULS Design Functions.zip Note that the biaxial version included in the download … Continue reading →

Posted in Beam Bending, Concrete, Excel, Newton, UDFs, VBA | Tagged , , , , , , , | 2 Comments

Working with dynamic arrays in Excel

Posted on May 23, 2019 by

Many of the VBA functions available here return results as arrays, which must be entered by selecting the desired output range, then  pressing Ctrl-Shift-Enter (CSE).  This can be inconvenient (or at least untidy) when the size of the output array varies.  … Continue reading →

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RC Design Functions 8_03

Posted on April 30, 2019 by

The RC Design Functions 8_03 spreadsheet is now available for free download from: RC Design Functions8.zip The main changes are: The NA layer check has been corrected for compression steel in tension The new AS 3600 crack width and curvature … Continue reading →

Posted in Beam Bending, Concrete, Excel, Newton, UDFs, VBA | Tagged , , , , , , , | 9 Comments

3D Frame with zero stiffness hinges

Posted on April 9, 2019 by

The previous version of 3DFrame allowed for spring releases at beam ends, but if the release stiffness was entered as zero it was treated as a rigid connection for that freedom.  Effectively zero stiffness releases could be modelled by entering … Continue reading →

Posted in Beam Bending, Excel, Finite Element Analysis, Frame Analysis, Newton | Tagged , , , , , | 3 Comments

Numerical Integration; Tanh-Sinh Quadrature v. 4.42

Posted on March 17, 2019 by

Back to Newton and Excel. I recently received a new update to the Tanh-Sinh Quadrature spreadsheet from Graeme Dennes, which may be downloaded from: Tanh_Sinh Quadrature. From the Readme: The Tanh-Sinh quadrature workbook has been enhanced as follows: The Tanh-Sinh … Continue reading →

Posted in Charts, Excel, Maths, Newton, Numerical integration, UDFs, VBA | Tagged , , , , , , , , | Leave a comment