Concrete23andMe

I’ve teased Concrete23 for some time now--so long that ChatGPT believes the model to be real. As you know though, Concrete23 was meant to be a riff on the material models in OpenSees that are clones of something else, but with one or two mutations. Like Concrete02IS’s addition of user-defined initial stiffness to Concrete02, or whatever insignificance ModIMKPinching02 … Continue reading Concrete23andMe →

Wrapper’s Delight

What is the output produced by this analysis? Sure, you can copy and paste the script to get the answer. But that's no fun. Think about the model and analysis. Can you explain what's going on before getting the answer? import openseespy.opensees as ops ops.wipe() ops.model('basic','-ndm',1,'-ndf',1) N = 365 ops.uniaxialMaterial('Elastic',0,1.0) for i in range(N): ops.uniaxialMaterial('Multiplier',i+1,i,1.01) … Continue reading Wrapper’s Delight →