A Tale of Two Element Formulations

The question of whether to use the force-based or displacement-based formulation for material nonlinear frame analysis is one that comes up a lot. The answer depends on a few factors, mostly the material and the element length. To get a sense of the basic issues, I will compare the two element formulations with a numerical … Continue reading A Tale of Two Element Formulations

Behind the Elastic Interior

If VH1 expanded its list of the top one hit wonders of the 2000s to include journal articles in structural engineering, Scott and Fenves (2006) would be right up there with James Blunt and Gnarls Barkley. Actually, Google Scholar puts the article up there with some pretty nice company. Like all journal articles, there's something … Continue reading Behind the Elastic Interior

Is Plastic Hinge Integration a Fruit or a Vegetable?

If distributed plasticity elements are fruits and concentrated plasticity elements are vegetables, then plastic hinge integration is something like a tomato. Based on papers I've read, manuscripts I've reviewed, presentations I've seen, etc., there's some confusion as to whether plastic hinge integration is a fruit or a vegetable. Here's my two cents. Concentrated plasticity elements … Continue reading Is Plastic Hinge Integration a Fruit or a Vegetable?

How to Cite OpenSees

In the $latex R^{42}$ space that defines academic performance evaluation, citation-based metrics comprise a small but often over-emphasized subspace. Based on the developers' Google Scholar profiles, it is clear that OpenSees generates a lot of citations from various corners of cyberspace. In the citation-stingy field of structural engineering, the numbers are impressive. On the other … Continue reading How to Cite OpenSees

No CAPS When You Spell the Framework’s Name

MF DOOM is one of the greatest lyricists (rap or otherwise) that you've probably never heard of. In his 2004 track "All Caps" with Madlib, DOOM states that his stage name should be written in all caps. All CAPS when you spell the man's name.MF DOOM, 2004 The preferred capitalization of OpenSees is not so … Continue reading No CAPS When You Spell the Framework’s Name