Search found 9 matches

by NALLAGATLABHAGYASREE
Thu May 21, 2020 10:52 am
Forum: OpenSees.exe Users
Topic: Single friction bearing element
Replies: 1
Views: 747

Single friction bearing element

Can someone please provide the formulation details of singleFPbearing element in OpenSees, In the Opensees site there are no references to the formulation. Accord to the website : Image with the circle of FY/Fx and FZ/FX is given, Limit is given as the coefficient of friction. Along with the same im...
by NALLAGATLABHAGYASREE
Wed May 06, 2020 5:57 am
Forum: OpenSees.exe Users
Topic: Eigen Analysis not solved
Replies: 6
Views: 1914

Re: Eigen Analysis not solved

In my model this won't be a problem as mine is not a single DOF, I changed some material properties and the error disappeared.
by NALLAGATLABHAGYASREE
Wed Apr 01, 2020 1:16 am
Forum: OpenSees.exe Users
Topic: Eigen Analysis not solved
Replies: 6
Views: 1914

Eigen Analysis not solved

Hi I am doing eigen analysis on building with bearings, for bearings i am using ElastomericBearingBoucWen element when i did eigen analysis i am getting the error as below ArpackSolver::Error with _saupd info = -9999 Could not build an Arnoldi factorization.IPARAM(5) the size of the current Arnoldi ...
by NALLAGATLABHAGYASREE
Tue Mar 31, 2020 5:07 am
Forum: OpenSees.exe Users
Topic: negative eigen value
Replies: 2
Views: 1053

Re: negative eigen value

Did you solve this issue?
Even I am getting the negative eigen value when 3d frame is isolated with LRB isoator?
by NALLAGATLABHAGYASREE
Sun Mar 08, 2020 9:00 pm
Forum: OpenSees.exe Users
Topic: LAYERED SHELL ELEMENT
Replies: 2
Views: 966

LAYERED SHELL ELEMENT

Can I use Layered shell elements for modelling the dome structures?
I need to model Reinforced concrete dome structure, can someone suggest me the element type?
by NALLAGATLABHAGYASREE
Thu Nov 21, 2019 6:00 am
Forum: OpenSees.exe Users
Topic: Concrete07 material model
Replies: 2
Views: 873

Re: Concrete07 material model

Dear selimgunay I will check with above. I have new problem of non-convergence during IDA. I am using lumped plasticity model when I do the the dynamic analysis there is convergence problem, so I increased the tolerance (initially it was 1 e-8) to 1e -4 ,it is working without convergence problem. I ...
by NALLAGATLABHAGYASREE
Wed Nov 06, 2019 10:47 am
Forum: OpenSees.exe Users
Topic: Concrete07 material model
Replies: 2
Views: 873

Concrete07 material model

I am new to OpenSees. I am using Concrete07 material, for specifying the properties of concrete07 material model I found formulae from the below site https://opensees.berkeley.edu/OpenSees/manuals/usermanual/4055.htm when I compare the values for ec0(maximum compressive strain) for US cutomary units...
by NALLAGATLABHAGYASREE
Sun Jul 28, 2019 9:53 pm
Forum: Useful Scripts.
Topic: Modelling of building for Incremental Dynamic Analysis
Replies: 2
Views: 1362

Re: Modelling of building for Incremental Dynamic Analysis

Hi frank, I had model building frame using fibre distributed element model,I used the NonlinearBeamColumn element for this ,I had followed the example7(3D FRAME) given in OpenSees website,i changed units to SI and material properties.When I increase the number of fibres in core concrete patch (initi...
by NALLAGATLABHAGYASREE
Wed Jul 24, 2019 4:18 am
Forum: Useful Scripts.
Topic: Modelling of building for Incremental Dynamic Analysis
Replies: 2
Views: 1362

Modelling of building for Incremental Dynamic Analysis

Hi everyone, I am working on seismic vulnerability assessment of buildings.I need to model a RC building for Incremental dynamic analysis in order to get fragility curves.I have read the research papers on this analysis.In all papers they are doing the IDA on lumped plasticity structure model using ...