Category Archives: Excel

Frame analysis with spring releases; 2D

Posted on 25/11/2016 by dougaj4

I have updated the Frame4 spreadsheet to allow a rotational spring stiffness to be specified for members with a rotational end release.  The new file can be downloaded from: Frame4.zip See Installing C# dll files, reminder for details of installing the … Continue reading →

Posted in Beam Bending, Excel, Finite Element Analysis, Frame Analysis, Link to dll, Newton, Strand7, VBA | Tagged , , , , | 1 Comment

More on Lookups

Posted on 22/11/2016 by dougaj4

Following my recent post on nearest lookups, I came across a post from Charles Williams on the opposite problem; how to do an exact VLookup  on a large amount of data without taking all day, but still retaining the ability to return … Continue reading →

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Installing C# dll files, reminder

Posted on 04/11/2016 by dougaj4

Installing the Frame4 spreadsheet on a new computer I had some problems registering the dll files required for the compiled solver routines, so here is a reminder of the procedure: Copy the alglibnet2.dll and ALMatrixLib.dll files to the appropriate folder (see … Continue reading →

Posted in Excel, Frame Analysis, Link to dll, VBA | Tagged , , | 5 Comments

Nearest Lookup Function

Posted on 21/10/2016 by dougaj4

The Excel Lookup functions (including VLookup, HLookup and Match) all allow for an “exact” or “closest” match on numerical data, but the closest option has a number of problems: The data must be sorted For VLookup and HLookup the data … Continue reading →

Posted in Coordinate Geometry, Excel, Maths, UDFs, VBA | Tagged , , , , , , , , | 2 Comments

Non-linear frame analysis; moment curvature and self-weight

Posted on 10/10/2016 by dougaj4

The Python/Fortran/Excel frame analysis program (previous version here) now has several new features added to the 2D-solver routines: The beam bending behaviour may now be specified with moment-curvature tables, rather than the linear-plastic behaviour required in the previous version. Beam … Continue reading →

Posted in Arch structures, Beam Bending, Concrete, Excel, Finite Element Analysis, Fortran, Frame Analysis, Link to dll, Link to Python, NumPy and SciPy, Strand7, VBA | Tagged , , , , , , , , , , , , , | 1 Comment