# Structural Analysis, Finite Difference Method, Pythonista, and Plotly

Beam Problem — Hand Calculation PDF LINK — beam analysis — hand calculations The 5 page calculation in the PDF was done in 1983. The quidiagonal matrix solution was probably done with an HP-41 calculator program. Beam Problem — Plotly Graph LIVE LINK to HTML PAGE — using Plotly The Plotly graph shows deflections, shears, […]

# Gauss Profile Jun 2020

From the wiki https://en.wikipedia.org/wiki/Gaussian_function (go to wiki)

# Yield Line Theory — Rotation Angles Feb 2020

In this post, I provide derivations for the rotation angles between planes. We have two formulas: An exact formula [Eq 1] An approximate (easy and sufficient) formula [Eq 2] My link to my calculations Link to Blodgett Example

# The Lincoln Index — Software Bugs Jan 2020

John, Thanks for the presentation. https://www.johndcook.com/blog/2010/07/13/lincoln-index/ How many errors are left to find?

# Calculate Beta w for Single Angles Dec 2019

AISC v15.0 Shapes Database # NOTE # For enhanced readability and easier translation to other software, # exponents are indicated with the (mathematically) traditional caret symbol. # In Python, replace all carets with a double asterisk. # Get single angle properties a = np.arctan(my_angle.TANA) c = np.cos(a) s = np.sin(a) b = my_angle.B_LOWERCASE d = […]

# Three Blue One Brown Feb 2019

Here is a beautiful website by Grant Sanderson.  3blue1brown So many exciting insightful mathematics presentations. The craft and artistry are as impressive as the mathematical concepts. Take a look — even if you think you know the material — you will see a few new gems (I bet).