Tag Archives: VBA

Section Properties with MeshPY, including torsion and warping

I recently discovered robbie van leeuwen’s structural engineering blog, which has an open-source set of Python routines for calculation of section properties, including torsion and warping constants.  The program uses the MeshPY Library for generating the finite element meshes required … Continue reading

Posted in Beam Bending, Concrete, Excel, Finite Element Analysis, Frame Analysis, Link to Python, Maths, Newton, Numerical integration, NumPy and SciPy, Strand7, UDFs, VBA, xlwings | Tagged , , , , , , , , | Leave a comment

Brent’s Method; Update and Examples

Has the free software at this site saved you time and/or money? If so, please contribute to the Raw Impact charity group providing practical help to poor communities in Cambodia: Everydayhero – Cambodia 2018 All contributions gratefully accepted. Contributions are … Continue reading

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Update to AL-Spline-Matrix

Has the free software at this site saved you time and/or money? If so, please contribute to the Raw Impact charity group providing practical help to poor communities in Cambodia:  Everydayhero – Cambodia 2018 All contributions gratefully accepted. Contributions are … Continue reading

Posted in AlgLib, Excel, Maths, Newton, UDFs, VBA | Tagged , , , , , , | Leave a comment

Composite Beam Spreadsheet Update 1.01

Following a comment here, I have modified the Composite Beam spreadsheet to correct the stage 1 stresses forces in the reinforcement as listed in Columns 6 and 7, when the tensile face is the top.  The output has also been … Continue reading

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Tables and VBA

I don’t use Excel Tables much, and not at all from VBA (where they are known as ListObjects), but that should probably change, so here are four links with comprehensive help on using Tables from VBA: The Spreadsheet Guru- VBA … Continue reading

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Working with implied units – update

Following comments at Eng-Tips I have added two examples with different procedures for evaluating ACI equations for the flexural tensile strength of concrete here.

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Using Alglib least-squares solvers

Following the last post on using the Python version of Alglib from Excel, via xlwings, this post looks in more detail at alternatives for fitting a non-linear function to a set of data, using the Levenberg-Marquardt method.  The spreadsheet with … Continue reading

Posted in AlgLib, Curve fitting, Excel, Link to Python, Maths, Newton, NumPy and SciPy, UDFs, VBA, xlwings | Tagged , , , , , , , , , , | Leave a comment