Search found 64 matches

by ssami
Tue Feb 16, 2021 10:02 am
Forum: OpenSees.exe Users
Topic: only-compression material
Replies: 1
Views: 593

only-compression material

Hi everyone,

Is there any multi-linear material in OpenSees that only considers the compression behavior? if no, is there any way to model such a material?

Thanks
by ssami
Sun Feb 14, 2021 10:20 am
Forum: OpenSees.exe Users
Topic: MultiLinear Material
Replies: 1
Views: 562

MultiLinear Material

Hi everyone, I have a question about the MultiLinear Material. According to the following link, in the unloading step, the value of stress for the forth node is shown 2f1, while in the explanation of the command, we can assign any value as stress for the forth node, namely f4. I am confusing which s...
by ssami
Wed Feb 10, 2021 2:12 pm
Forum: OpenSees.exe Users
Topic: Hysteretic material
Replies: 1
Views: 1106

Hysteretic material

Hi everyone,

I have a question about the Hysteretic material. Three nodes should be defined to model this material ($e1p, $s1p) , ($e2p, $s2p) , ($e3p, $s3p), is it possible to define more than three nodes for this material, such that we can define 4 or 5 nodes to simulate this material?

Thank you.
by ssami
Tue Dec 29, 2020 10:36 am
Forum: OpenSees.exe Users
Topic: modified-Clough model
Replies: 1
Views: 772

modified-Clough model

Hi everyone,

Is there any way to model the modified-Clough material in OpenSees?

Thank you.
by ssami
Sun Dec 27, 2020 7:30 am
Forum: OpenSees.exe Users
Topic: RambergOsgoodSteel Material
Replies: 1
Views: 746

RambergOsgoodSteel Material

Hi everyone, I modeled a SDOF system with the RambergOsgoodSteel material, but when I want to conduct a nonlinear time history analysis under an earthquake, the following message appears: WARNING could not create uniaxialMaterial RambergOsgoodSteel I would be really grateful, if anyone could help me...
by ssami
Sat Dec 19, 2020 6:18 am
Forum: OpenSees.exe Users
Topic: Takeda material
Replies: 2
Views: 956

Re: Takeda material

Is there anybody who can help me in this regard?
by ssami
Mon Dec 14, 2020 4:11 pm
Forum: OpenSees.exe Users
Topic: Takeda material
Replies: 2
Views: 956

Takeda material

Hi everyone, What values have to be considered for the parameters the Hysteretic material to convert it into the Takeda material? I mean for the parameters pinchx, pinchy, damage1, damage2 and beta, such that the Takeda material is obtained.

Thanks
by ssami
Sun Dec 13, 2020 3:55 pm
Forum: OpenSees.exe Users
Topic: Initial condition at a speciffic time
Replies: 1
Views: 566

Initial condition at a speciffic time

HI everyone, I have a question. In a time history analysis of a MDOF system under a ground motion with the duration of 20 sec, is it possible to stop the analysis at t=10 sec and read the displacement and velocity at existing masses of the system at that time, then change them to desired values and ...
by ssami
Fri Dec 11, 2020 1:54 pm
Forum: OpenSees.exe Users
Topic: Takeda hysteretic model
Replies: 2
Views: 675

Re: Takeda hysteretic model

Thank you very much. What values have to be considered for the parameters of pinchx and pinchy in this regard?
by ssami
Thu Dec 10, 2020 5:54 am
Forum: OpenSees.exe Users
Topic: Takeda hysteretic model
Replies: 2
Views: 675

Takeda hysteretic model

Hi everyone,

Considering that there is no Takeda hysteretic model in OpenSees, how can I assign such a hysteretic rule to a SDOF system using OpenSees?

Thanks
by ssami
Mon Oct 19, 2020 12:51 am
Forum: OpenSees.exe Users
Topic: Bilin02 material
Replies: 5
Views: 1206

Re: Bilin02 material

selimgunay wrote:
Sun Oct 18, 2020 10:42 am
Did you add the model builder to the beginning of your script: model BasicBuilder -ndm $ndm <-ndf $ndf>
Yes, I did.
model BasicBuilder -ndm 2 -ndf 3;
by ssami
Sat Oct 17, 2020 6:10 am
Forum: OpenSees.exe Users
Topic: Bilin02 material
Replies: 5
Views: 1206

Re: Bilin02 material

Probably an error with the inputs. You'll have to show us the input command you used. Dear Prof. Michael H. Scott, thank you very much for the response.The input command related to Bilin02 that has been used for the model is as follows: uniaxialMaterial Bilin02 3 $Kspr $strhard $strhard [expr 1.0*$...
by ssami
Tue Oct 13, 2020 2:00 pm
Forum: OpenSees.exe Users
Topic: Bilin02 material
Replies: 5
Views: 1206

Bilin02 material

Hi everyone, when I run a steel frame model, in which the uniaxialmaterial Bilin02 has been used, I faced the following problem, please guide me to solve the problem, thank you in advance.

warning could not create uniaxialmaterial Bilin02
by ssami
Wed Dec 11, 2019 2:22 am
Forum: OpenSees.exe Users
Topic: ViscousDamper material
Replies: 3
Views: 1240

ViscousDamper material

Hi everyone

I modeled a frame with viscous damper using the viscousDamper material, but when I run the model, the following message appeares:

Warning: could not create uniaxialmaterial ViscousDamper

I would be grateful if everyone could help me to solve this problem.