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Hi everyone, I want to model the shear links in an Eccentric Braced Frame Structural System. My problem is selecting the best element object in opensees/openseespy which can replicate the hysteretic behavior of its as the experimental test results show. I have found some papers: 1) 2018.05.22 - Expe...

Hello everyone, I have problems with understanding the modeling of a rotational spring. As far as I know, the dimension for the stiffness of a rotational spring is FL (i.e. moment/rotation_angle; kip-in./rad). How can we model a rotational spring using a zeroLength element and a uniaxial material by...

You should consider using other material models for your steel. ReinforcingSteel is very unstable. Thank you for your answer. Steel02 is much more stable than this, but in the literature I have seen a lot of people who have used ReinforcingSteel material model and none of them have convergence issu...

Hello everyone, I have written the code github repository link is available below: https://github.com/husayn-mohammadi/01_cantilever when I run the code for a cyclic pushover analysis, I get the message ' R is negative in ReinforcingSteel::SetMP() ' and subsequently the analysis explodes. It doesn't...

No need to wory guys. I fixed it up. The following code worked out just well. :D ops.uniaxialMaterial(*['ReinforcingSteel', 1, Fy, Fu, Es, Esh, eps_sh, eps_ult, '-GABuck', lsr, beta, r, gamma, '-CMFatigue', Cf, alpha, Cd, '-IsoHard', a1, limit, '-MPCurveParams', R1, R2, R3 ])

Hi everyone, I have defined a function to create steel material models and I run into "OpenSeesError: See stderr output" error in the 1st version of my code, while in the 2nd one the analysis runs successfully. In the 1st version I give it my customized values for the parameters of "R...