The OpenSees Community

Dear all researchers I tend to remove my element after reaching the defined force. but I don't know how to write a loop for understanding which the element forces reached to the defined force or not. and after removing the element, How can converge the analysis? If anyone has a code, please provide ...

Dear all For creating a cyclic protocol based on AISC 341-16, how calculate the parameters below for our model? Δbm = value of deformation quantity, Δb, at least equal to that corresponding to the design story drift, in. (mm) Δby = value of deformation quantity, Δb, at first yield of test specimen, ...

Dear Vesna, In your Opensees code for SCBF based on the presentation by the name of "Modeling SCB frames using beam-column elements," you used Fatigue material for braces the same as bellow : uniaxialMaterial Fatigue $matTag $tag <-E0 $E0> <-m $m> <-min $min> <-max $max> uniaxialMaterial F...

Dears Ozgura and FMK,

How to determine the fiber numbers in a section?
desertemerland@yahoo.com

Sincerely yours

Dear all I tend to define orient in a zero-length element for a brace, but I don't know how to calculate the orient parameters? I have read the Opensees wiki example but I did not understand. An example If brace angle with the x-axis is 30 degrees, How are the following parameters calculated? -orien...

Hello Dears
How must calculate the parameters of orient for zero-length element?

Dear fmk and all I have a dll file that is written by someone else. I put it in the same folder as my OpenSees executable. But I get this warning "WARNING could not create uniaxialMaterial MaxStrainRange" What should I do to make this file work properly? Your kindness is highly appreciated...

difrex wrote:
> http://www.difrex.com/
What is this link about?

Dears fmk and edwardal
Is the code in Hiao's thesis perfect and working properly? or not?
because i want to implement this code to Opensees, I am not sure about it, please help me.
best regards

How can consider out of plane buckling in 2d model braced frames in Opensees?

jackmil wrote: > dear frank > thank u for ur concern > i knew that a new fracture material model was implemented in the OPENSEES > framework based on the results > of the NEEShub - Laboratories that developed and written by po-Chien Hsiao > from UW seatle. > I have the both .cpp & .h of that mat...

Dear edwardal,
I want to use FractureMaterial from Po-Chien Hsiao's PhD thesis "Seismic Performance Evaluation of Concentrically Braced Frames", 2012.
What should I do?
I must implement the c++ code into Opensees or is there another way?
please help me.

Hi dears I work on chevron braced frames. I am using Hsiao's model for brace fracture in this article "Seismic Vulnerability of Older Braced Frames". https://ascelibrary.org/doi/abs/10.1061/%28ASCE%29CF.1943-5509.0000394 or https://www.researchgate.net/publication/273619044_Seismic_Vulnera...

Dear edwardal
could you implement the above code in Opensees?
and could you find any version of Opensees which have the FractureMaterial?

Hi Ebrahim
Could you define the pinching4 material parameters?
I have the same problem