Search found 13 matches

by Allaaldeen
Wed Jun 17, 2020 2:22 pm
Forum: OpenSees.exe Users
Topic: Takeda hysteresis model
Replies: 3
Views: 987

Re: Takeda hysteresis model

No. I meant using the pinching parameters in the hysteretic material
by Allaaldeen
Sun Jun 14, 2020 7:57 am
Forum: OpenSees.exe Users
Topic: Takeda hysteresis model
Replies: 3
Views: 987

Re: Takeda hysteresis model

you should use the pinching parameters in x and y axes. The link below shows pinching parameters of 0.2 and 0.6.

https://ibb.co/hBYTjhn
by Allaaldeen
Fri Jun 12, 2020 8:08 pm
Forum: OpenSees.exe Users
Topic: Jagging behavior in hinge moment-rotation curve
Replies: 0
Views: 502

Jagging behavior in hinge moment-rotation curve

Hi all in dynamic analysis, I am getting Jagging behavior in hinge moment-rotation curve when the stiffness changes to negative as shown in the pic in the link below I am using ModIMKPeakOriented material for the plastic hinges. I got the same jagging using the Hestritic material. under cyclic stati...
by Allaaldeen
Sun Feb 24, 2019 11:50 am
Forum: OpenSees.exe Users
Topic: axial force problem on nonlinear beam element
Replies: 6
Views: 1846

Re: axial force problem on nonlinear beam element

I am not an expert, but I had the same issue. The axial force in fiber elements is caused by restraining the elements from expansion. Concrete fiber elements expand when subjected to moment. that is because the axial displacement of the element is calculated by integrating the strains at midsection ...
by Allaaldeen
Wed Oct 17, 2018 10:50 am
Forum: Framework
Topic: Error: Identifier is not defined
Replies: 4
Views: 2045

Re: Error: Identifier is not defined

Did you solve this problem?
by Allaaldeen
Sun Dec 03, 2017 7:29 am
Forum: OpenSees.exe Users
Topic: integrator DisplacementControl
Replies: 4
Views: 1162

Re: integrator DisplacementControl

Thank you all.
by Allaaldeen
Sat Dec 02, 2017 5:40 am
Forum: OpenSees.exe Users
Topic: integrator DisplacementControl
Replies: 4
Views: 1162

integrator DisplacementControl

Hi all
Is it possible in Opensees to apply DisplacementControl on two points (or more) at the same time?
by Allaaldeen
Sat Nov 11, 2017 10:50 am
Forum: OpenSees.exe Users
Topic: Modified Ibarra-Krawinkler Parameters
Replies: 8
Views: 2310

Re: Modified Ibarra-Krawinkler Parameters

"sidesawy collapse of deteriorating structural systems under seismic excitations" by Lignos and Krawinkler, Blume earthquake engineering center. Report number 177.
by Allaaldeen
Fri Nov 10, 2017 8:24 am
Forum: OpenSees.exe Users
Topic: Fiber elements.
Replies: 2
Views: 895

Re: Fiber elements.

Thanks for your reply.
by Allaaldeen
Wed Nov 08, 2017 6:37 am
Forum: OpenSees.exe Users
Topic: Modified Ibarra-Krawinkler Parameters
Replies: 8
Views: 2310

Re: Modified Ibarra-Krawinkler Parameters

Hi I am using Ibarra- Medina-Krawinkler Hysteretic model for concrete columns. The parameters for concrete columns can be obtained from (PEER 2007/03) by Haselton et al. The parameters for steel members can be obtained from Blume report (TR 177) By Lingnos and Karawinkler. Both reports are accessibl...
by Allaaldeen
Mon Nov 06, 2017 7:19 am
Forum: OpenSees.exe Users
Topic: Fiber elements.
Replies: 2
Views: 895

Fiber elements.

Hi I noticed when a lateral load is applied to a reinforced concrete fiber element (column element), the element undergoes upwards displacement. This happens with or without axial load. Furthermore, when the same element is assigned linear elastic (or steel) properties there will be no upwards displ...
by Allaaldeen
Sun Oct 22, 2017 5:32 pm
Forum: OpenSees.exe Users
Topic: Source code
Replies: 2
Views: 834

Re: Source code

Thanks for your reply.
by Allaaldeen
Mon Oct 16, 2017 3:05 pm
Forum: OpenSees.exe Users
Topic: Source code
Replies: 2
Views: 834

Source code

Hi all

The link provided to browse the source code is not working.

http://opensees.berkeley.edu/WebSVN/lis ... runk%2FSRC

is it not working or a permit is required?
I accessed the link months ago and it was working.

Regards