The OpenSees Community

Where can I find the latest version of documents that introduce the architecture of OpenSees? I'm writing some lines to output the global and elemetary stiffness matrices.

Thanks!

Can anyone please answer my question?

Could you please tell me how to obtain real-time strain rates of an uniaxial member? I am trying to add a rate-dependent material into OpenSees. To begin with, I ran a transient analysis on a simply supported bar subjected to cyclic loadings at a constant loading rate. However I found the variable &...

Thanks! I forgot to integrate the torsional stiffness. Now it works.

Anyone knows what does the following error mean? Appreciate your help. WARNING BandGenLinLapackSolver::solve() -LAPACK routine returned 1397 WARNING AcceleratedNewton::solveCurrentStep() -the LinearSysOfEqn failed in solv e() StaticAnalysis::analyze() - the Algorithm failed at iteration: 0 with doma...

How can I derive stiffness matrix and mass matrix from OpenSees? Appreicate your help.

Anyone can help?

1. For most recent editions like OpenSees 2.2.2, there is no OpenSees.dsw in the source code folders. Is there any updated instruction of building an OpenSees in windows system? 2. I'm doing a pushover analysis using Concrete07. The program downloaded from the website works well. But when I use an O...