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Hi all, I am looking to model a SDOF structure to perform time history analysis against earthquake loading. My primary objective is to model the structure in such a way that its global force-displacement hysteresis response should follow a specific uniaxial material model (flagshape uniaxial materia...

This error can be due to so many things. Make a minimal example that replicates the issue. import openseespy.opensees as ops import math import matplotlib.pyplot as plt import numpy as np A = 1.0 E = 2.*10**11 Fy = 3.*10**10 Nsteps = 1000 Px = 0.0 Py = 0.0 mass = 1266514796.0*4 # set modelbuilder o...

mhscott wrote: ↑

Thu May 18, 2023 6:38 am

Track down the line of code that causes the error

Hi mhscott is there any updates regarding this? I am also having the same error and the error line correspond to ops.analyze(10) command.

Hey everyone! I'm currently working on modelling a cantilever column to perform some time history analysis. I'm interested in the force displacement hysteresis behaviour of my model, and I want it to follow a predefined uniaxial material model globally. I cannot simply use a fibre section and assign...

Hello everyone. I am currently using the flagshape material model in OpenSeespy. However, I cannot find the user command line in OpenSeespy material library. Currently, I am using the command ops.uniaxialMaterial('FlagShape', tag, E, Fy, Eh ,beta). the command line is working well but the issue is, ...

FlagShape material is from Chin-Long: https://github.com/OpenSees/OpenSees/blob/master/SRC/material/uniaxial/FlagShapeMaterial.cpp Is it the unaxial hardening material in the openseespy doc? Because I am unable to find it in user documentation. Thanks Prof. I got this. I was wondering about the ref...

mhscott wrote: ↑

Mon Oct 16, 2023 3:18 pm

FlagShape material is from Chin-Long: https://github.com/OpenSees/OpenSees/bl ... terial.cpp

Is it the unaxial hardening material in the openseespy doc? Because I am unable to find it in user documentation.

mhscott wrote: ↑

Mon Oct 16, 2023 3:58 am

The FlagShape material is available in OpenSeesPy. Make sure you are using the latest version.

I can see the the self centering unaxial material but it has certain limitations of parameter beta. The model I just mentioned where value of beta = 1 corresponds to beta = 2.

You have to get the actual source code for the model. Could you please have a look on this. I can find the source code on opensees repo. The code is from ching-long lee and the lastest version of opensees do not have this model. Help will be highly appreciated. Thanks https://github.com/OpenSees/Op...

mhscott wrote: ↑

Sun Oct 15, 2023 7:52 am

You have to get the actual source code for the model.

Thanks Prof. I have got the source code. How I can implement the code to openseespy?

Hello, I have an opensees.exe file which contains a specific material model I want to use for my analysis in openseespy. My Question is how I can run the opensees.exe file in python? Or if can not is their a way to access the source code of the opensees.exe file which contains my desired material mo...