Category: Engineering

App C2 AISC Bolt Capacity using Dash/PythonAnywhere Nov 2024

• khoitsma
• AISC, Dash by Plotly, iPad_iPhone, Plotly, Python, pythonanywhere
• 0 Comments

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Fastest Maze-Solving Competition on Earth April 2024

• khoitsma
• Engineering, General, Hardware, Kids (middle school and up), Science
• 0 Comments

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John Smeaton — "Father of Civil Engineering" Feb 2024

• khoitsma
• Engineering, General
• 0 Comments

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AISC Bolt Shear Capacity — Minimum Dimensions Feb 2024

• khoitsma
• AISC, Engineering, Engineering Codes, Pythonista, Steel Detail
• 0 Comments

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Hand Calculated Truss vs RISA Dec 2023

• khoitsma
• Calculus, Computer Algebra, Engineering, Jupyter, Mathematics, Plotly, Python, RISA-3D, Sympy
• hand calculated, RISA, truss
• 0 Comments

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Engineering Math Nov 2023

• khoitsma
• Engineering, Kids (middle school and up), Mathematics, Mental Math
• 0 Comments

“Often while working, an arithmetical answer is needed — exact is sometimes required, approximate is often acceptable — maybe the basis of a decision or a path forward is based on a few quick calculations, with more rigorous calculations to follow

Multiply by 11 (or 12). Just write down the answer !
Pascal’s Triangle
Aliquot Parts

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The Engineering Hub Nov 2023

• khoitsma
• Engineering, General
• 0 Comments

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Convolution as seen in Virtual Work Nov 2023

• khoitsma
• Calculus, Engineering, Jupyter, Mathematics, Plotly, Python, Sympy
• 0 Comments

Is this convolution linear or nonlinear?

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CQ Brown Oct 2023

• khoitsma
• Engineering, General
• 0 Comments

Texan and Texas Tech in the news

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Design for Flood, Wind, Seismic, Snow, Ice, and Fire Aug 2023

• khoitsma
• Engineering, General, Observation
• 0 Comments

…

Overview
Flood
Wind
Earthquake
Snow and Ice
Fire

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Moment due to Linearly Varying Pressure Aug 2023

• khoitsma
• Calculus, Engineering, Excel, Mathematics, Python, PyXLL, Sympy
• 0 Comments

I built a new function in Python and PyXLL

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Small Ideas — Large Effects Aug 2023

• khoitsma
• Concept, Engineering, General, History, Mathematics, Science, Software
• 0 Comments

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Online Embedded Excel Aug 2023

• khoitsma
• Dash by Plotly, Engineering, Excel, iPad_iPhone, Petrochemical Design, Python, pythonanywhere
• 0 Comments

I built a new app on the web — accessible from any device — desktop, phone, iPad

· Grating calculations

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Filter a Pandas Dataframe using PyXLL (with video) Jul 2023

• khoitsma
• AISC, Concept, Engineering, Excel, Python, PyXLL, Video
• 0 Comments

The function uses only three parameters: the criteria range, the reverse sort toggle, and the upper limit on rows of results.

Note that conditional formatting is applied using the PyXLL formatter option.

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Enhanced Lookup — Excel and PyXLL June 2023

• khoitsma
• Engineering, Excel, Python, PyXLL
• 0 Comments

I built a couple special lookup functions using PyXLL

and

an interesting helper function

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Foundation Bearing Pressures using Jupyter and PyXLL (with videos) Mar 2023

• khoitsma
• Calculus, Engineering, Excel, Jupyter, Plotly, Python, PyXLL, Video
• 0 Comments

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Soil Texture Triangle with Plotly Jun 2023

• khoitsma
• Engineering, Plotly, Python
• 0 Comments

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ACI Rebar Lookup May 2023

• khoitsma
• ACI, Engineering, Engineering Codes, Excel, Python, PyXLL
• 0 Comments

I built a rebar lookup using PyXLL

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PyXLL using Jupyter and PySimpleGUI Interface (with video) Dec 2022

• khoitsma
• AISC, Excel, Jupyter, PySimpleGUI, Python, PyXLL, Video
• 0 Comments

This post features:
  the PyXLL add-on
  Jupyter
  the PySimpleGUI graphical interface

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Florida International University (FIU) pedestrian bridge collapse

• khoitsma
• Engineering, General, Science
• 0 Comments

So many ways to have avoided this catastrophe

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Easy Section Properties for Array of Points © Oct 2022

• khoitsma
• AISC, Concept, Engineering, Mathematics, Steel Detail
• 0 Comments

Based on finite calculus

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Safe Drainage Aug 2022

• khoitsma
• Engineering, General
• 0 Comments

Avoiding deaths due to drowning in floodwaters.

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A Tale of Two Houses

• khoitsma
• Engineering, General
• 0 Comments

Good order is the foundation of all good things.

— Edmund Burke

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The elastica: a mathematical history — Raph Levien Aug 2022

• khoitsma
• Calculus, Engineering, Mathematics
• 0 Comments

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AISC bolt holes Aug 2022

• khoitsma
• AISC, Python, Steel Detail
• 0 Comments

This code illustrates the readability of Python.

Compare reading the text of AISC 15th Edition Manual, Section J3 to the program statements.

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Two Point Lift with Rotation Aug 2022

• khoitsma
• Engineering, Excel
• 0 Comments

Two point lifts with rotation sometimes defy simple intuition.
I present several features in my Excel spreadsheet.

 

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Silver Bridge Disaster

• khoitsma
• Engineering
• 0 Comments

Design lessons from a 1967 bridge failure

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Asymmetric Frame Loading Jul 2022

• khoitsma
• Calculus, Engineering, Jupyter, Mathematics, Plotly, Python, RISA-3D, SAP2000, Sympy
• 0 Comments

In memory of Dr. Terry Kohutek, Texas A & M, Professor of Civil Engineering

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Structural Calculations for Beams Using Calculus via Sympy Jul 2022

• khoitsma
• Calculus, Computer Algebra, Engineering, Jupyter, Mathematics, Plotly, Python, Sympy
• 0 Comments

Something about calculus and Sympy is lovable.

Click to see R1 plot; hover over data points to see data values; use finger or mouse to select rectangular area of interest

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Pipe Flexibility using Julia and Jupyter Jul 2022

• khoitsma
• ASME, Engineering, Julia, Jupyter, Plotly, Plots, Symbolics
• 0 Comments

I compared equations from den Hartog, from Kireev et al, and from B31.3 Table D300.

The agreement was quite good.

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