# Engineering

## Rational Buckling Analyses to AS4100 or NZS3404 (Part 5)

So if you’ve been following along with this series you now hopefully know a little bit more about some of the methods involved in undertaking buckling analyses. Pat yourself on the back for making it this far through my ramblings…

## Rational Buckling Analyses to AS4100 or NZS3404 (Part 4)

In the last post we looked at the basic method of undertaking a flexural buckling analysis using Mastan2 and interpretation of the results. We compared a couple of the built-in equations in AS4100 & NZS3404 relating to the moment modification…

## Rational Buckling Analyses to AS4100 or NZS3404 (Part 3)

In the last post in this series we looked at a semi-real scenario where a rational elastic buckling analysis was undertaken in which we were able to determine the axial capacity of a system of members. The exact type of…

## Rational Buckling Analyses to AS4100 or NZS3404 (Part 2)

In part 1 of this series, we briefly explored the requirements related to calculating the capacity of a column via the use of a buckling analysis. Introducing the general methodology to follow and showing agreement with the normal hand methods…

## Rational Buckling Analyses to AS4100 or NZS3404 (Part 1)

This post was inspired by a rather epic post at Eng-Tips forum, which came out of a seemingly simple request for some help on the segment length to consider for a continuous beam design to AS4100 (the Australian Steel code).…

## Inflection point != point of restraint

It’s a question that seems to come up from time to time in my experience, can you take the point of inflection as a point of lateral restraint for the restraint of structural steel members under flexural forces? The answer…

## Improving Excels spellchecker with highlighting

Excel does many things well, but it goes without saying many things could be vastly improved, or at the very least shown a bit of love by Microsoft. One particular thing in Excel that that causes me some frustration is…

## Parabolas, Rectangles, Triangles & Snakes (Part 9)

Part 9 – Verification Part of the verification process in development of a spreadsheet or software tool involves what I like to term the process of idiot proofing. Some end users are considered as potential idiots, asking yourself to think…

## Finding an equation for the Moment of Inertia of a complex tapering member using Python

Often in engineering you need to make simplification in analyses that make your life easier, often applying some judgement based on experience that involves some simplification in the analysis of a structure for example. Sometimes you do this in the…

## Finding the Warping Constant for back-to-back Cold Formed Channels using Python

This blog post is inspired by a recent post which I responded to on the EngTips forum. The question was related to finding the warping constant of back to back cold formed channels. The poster was querying the validity of…

## Parabolas, Rectangles, Triangles & Snakes (Part 7)

Part 7 – Documentation & Verification, Better Than More Integration? At some point in any projects life cycle you should start thinking about the need for documentation and verification. This post and probably the next few will be dedicated to…

## Parabolas, Rectangles, Triangles & Snakes (Part 6)

Part 6 – Slicing & Dicing Based on the last two posts, I’d now reached the stage where I’d determined the general basis for calculating the force and centroid of the concrete compression force. This seemed like one of the…

## Parabolas, Rectangles, Triangles & Snakes (Part 5)

Part 5 – Centroids, More Integrals…. In the last post we went through a process to find a general force integral which involved knowing the width and height of the stress block in terms of how far from the neutral…

## Parabolas, Rectangles, Triangles & Snakes (Part 4)

In the first post in this series, I posted the following integral for the x direction centroid of a part of the compression block for EC2 parabolic-rectangular derivation. At first glance the following integral looks a bit intimidating....

## Parabolas, Rectangles, Triangles & Snakes (Part 3)

Part 3 – Class Hell Week At some point I came to the realisation that I’m going to need classes in my code, I didn’t know what they were exactly, but I needed them! Everyone else used them, so I…

## Parabolas, Rectangles, Triangles & Snakes (Part 2)

Part 2 – Bits & Pieces of Geometry A large part of the previous issues I was having with implementing a tool like this in Excel is the fact you have to generate your own routines (or find suitable ones…