HigherEd 2.0

This is a pretty good one. It’s all about the practical issues associated with drawing shear and moment diagrams. For instance, what are some of the best ways to execute Step 5 (check!)? This module contains some very useful tips on checking your work for maximum accuracy. I can also point you […]

 

 Lecture Module 25, October 26 2007: Play Now | Play in Popup | Download

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Today we continued our study of internal forces, getting in to more of the details of shear and moment. We also introduced the very important concept of the shear and moment diagram. If you Google it, you will get hundreds of thousands of results for “shear and moment diagram”, including things like this. […]

 

 Lecture module 24, Oct 22, 2007: Play Now | Play in Popup | Download

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This is a short and sweet introduction to Chapter 7 on internal forces. We are just trying to motivate the study of Chapter 7 by saying: “we often need to know the distribution of internal forces across a structure in order to identify max/min values, which we use for further analysis.” Simple […]

 

 Lecture module 23, Oct 19, 2007: Play Now | Play in Popup | Download

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This module continues our discussion of trusses and zero force members, but also introduces machines and frames. The keys to the analysis of machines and frames can be summarized:

we usually draw component FBDs of each piece of the structure, and these FBDs are constructed as if we have made method of sections cuts […]

 

 Lecture Module 21, October 15 2007: Play Now | Play in Popup | Download

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We spent some time on Oct. 10 and 12 discussing trusses (and the exam), and we introduced a piece of software called Arcade. This is a really cool and powerful tool for structural analysis and visualization. As you saw in class, it has lots of great intuitive features (color and thickness of line, […]

 

 Video: A truss with multiple zero force members.: Play Now | Play in Popup | Download

 

 Video: column buckling simulation (no ZFM): Play Now | Play in Popup | Download

 

 Video: column with no buckling due to presence of ZFM: Play Now | Play in Popup | Download

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Seems like so long ago…but this is a good one. It introduces us to trusses and to some truss analysis tools. Here you will find a description of two of the key methods for structural analysis: method of joints and method of sections. In general, the method of sections is more […]

 

 Lecture Module 17, August 5 2007: Play Now | Play in Popup | Download

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This is a short but sweet review of Friday’s lecture on FBDs, plus an extension to introduce equilibrium concepts for rigid bodies. Here we once again reinforce the idea that the FBD leads directly to the equilibrium equations by indicating the directions of the forces (i.e., the signs of the terms in the equilibrium […]

 

 Lecture module 15, Oct 1 2007: Play Now | Play in Popup | Download

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Today we introduced Chapter 5 on rigid body equilibrium (you may find this useful as well?!?) and did some small examples. The think-pair-share approach is kind of a useful mechanism to get you talking specifically about the problem and asking yourself the hard questions about how to solve it. It’s something we’ll come […]

 

 Lecture module 14, Sept. 28 2007: Play Now | Play in Popup | Download

 

 Video solution: Prob. 5-4: Play Now | Play in Popup | Download

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So at the end of lecture today, we discussed two ways of doing moment-type problems: the “vector” way and the “scalar” way. In addition to the information embedded in the lecture, I have also put together a small video showing how to do part of Prob. 4-102 using both approaches. Both the […]

 

 Lecture module 12, Sept 24 2007: Play Now | Play in Popup | Download

 

 Prob. 4-102, partial solution with scalar and vector methods: Play Now | Play in Popup | Download

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Here it is, late but better than never. This was a sort-of brief module which expanded our understanding of moments and couples, and allowed us to do some problems in class. We will continue this discussion in Module 12 (Sept. 24). The main take-away from this module is the different between a […]

 

 Enhanced Podcast: Play Now | Play in Popup | Download

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