Search found 3 matches

by usy
Mon May 10, 2021 12:09 pm
Forum: Reliability Analysis
Topic: Which software is better: 3D-Basis or Opensees?
Replies: 3
Views: 1610

Re: Which software is better: 3D-Basis or Opensees?

Both OpenSees and 3D Basis(including modified versions 3D Basis-ME-MB) can be used to model isolated structures effectively as long as we have a basic understanding on program enviroment(e.g., how to include isolator elements into structure or define support conditions). You can find many people who...
by usy
Fri Oct 02, 2020 4:42 am
Forum: OpenSees.exe Users
Topic: Damping cause divergence
Replies: 5
Views: 1085

Re: Damping cause divergence

Dear Gholamreza
You can find useful information on on damping matrix/Rayleigh in the following topic:
-Rayleigh damping problems by user mtsonicc (Wed Jan 20, 2016 3:44 am)
by usy
Mon Aug 24, 2020 1:20 pm
Forum: OpenSees.exe Users
Topic: Single friction bearing element
Replies: 1
Views: 663

Re: Single friction bearing element

Hello, In its basic form, horizontal displacement-force relationship of single concave Friction Pendulum bearing can be formulated as follows: F(u)= (N/R)*u + (Mu*N)*sign(udot) where F: horizontal force, u: horizontal displacement, udot: velocity, N: axial load on the bearing, R: effective radius, M...