Search found 16 matches

by xantis85
Sat Sep 26, 2020 9:37 am
Forum: OpenSees.exe Users
Topic: Problem after sp load pattern
Replies: 2
Views: 852

Re: Problem after sp load pattern

Dear Professor Scott, thank you very much for your quick reply. I tried to remove the loadPattern 3, but the problem still arise. I've solved by using Multiple support command instead of pattern Plain. set patternTag 3; pattern MultipleSupport $patternTag { timeSeries Path 100 -dt 0.005 -filePath "D...
by xantis85
Fri Sep 25, 2020 2:02 pm
Forum: OpenSees.exe Users
Topic: Problem after sp load pattern
Replies: 2
Views: 852

Problem after sp load pattern

Hi, I've a problem when trying to perform eigen analysis after a load pattern that imposes a known displacement path adopting sp command: pattern Plain 3 "Series -dt $dt -filePath $DispHistory1 -factor 1.0" { sp 1002 1 1.0 sp 1003 1 1.0 } where DispHistory1 is a txt file containing a displacement ti...
by xantis85
Fri Mar 06, 2020 8:57 am
Forum: OpenSees.exe Users
Topic: Trubles with newer OpenSees versions
Replies: 2
Views: 871

Trubles with newer OpenSees versions

Hello to everyone! I was using the 3.0.3 version of Opensees but there were some problems. In particular, when trying to use the nDMaterial PlaneStressUserMaterial the software gave me this output: "PSUMAT - NOT DEFINED IN THIS VERSION, SOURCE CODE RESTRICTED". So I decided to upgrade to newest vers...
by xantis85
Fri Jul 05, 2019 6:09 am
Forum: OpenSees.exe Users
Topic: Interaction between OpenSees and Matlab
Replies: 0
Views: 452

Interaction between OpenSees and Matlab

Hello! I would kindly ask if exists a procedure to call a single material from matlab (for instance the pinching4 material) (i.e., without implementing the whole pinching4 hysteretic behavior in matlab). This would be particularly interesting when performing a calibration of the pinching4 parameters...
by xantis85
Mon Jul 18, 2016 1:51 pm
Forum: OpenSees.exe Users
Topic: Parallel material <-factors $factor> doesn't work
Replies: 1
Views: 767

Parallel material <-factors $factor> doesn't work

Hi to everyone, I got a problem with the parallel material when trying to use the command "-factors". The parallel material works fine when unitary factors are implicitly assumed (i.e., the command is uniaxialMaterial Parallel $coreID($xi) 701 56), but when trying to combine materials with different...
by xantis85
Wed Jun 01, 2016 3:35 am
Forum: OpenSees.exe Users
Topic: MVLEM convergence Problem
Replies: 1
Views: 1225

MVLEM convergence Problem

Hi, I've a problem when running the opensees example for MVLEM. The output is: "WARNING: numeric analysis returns 1 -- Umfpackgenlinsolver::solve WARNING NewtonRaphson::solveCurrentStep() -the LinearSysOfEqn failed in solve() StaticAnalysis::analyze() - the Algorithm failed at iteration: 0 with doma...
by xantis85
Thu Apr 21, 2016 6:04 am
Forum: OpenSees.exe Users
Topic: DataBase Commands
Replies: 6
Views: 2695

Re: DataBase Commands

Hi,
if possible, I'd be grateful if the pinching4 material is added to the next version of Opensees.

Thanks,
Marco.
by xantis85
Wed Jun 04, 2014 12:52 pm
Forum: OpenSees.exe Users
Topic: Axial load in forceBeamColumn
Replies: 1
Views: 1333

Axial load in forceBeamColumn

Hi, I've a problem with the axial load in a forceBeamColumn. I'm using this element to model the nonlinear beam-column in series with the limit state material, but the applied axial load varies during the analysis although the element has not yet failed axially. I'm using the displacement control mo...
by xantis85
Fri May 30, 2014 12:32 am
Forum: OpenSees.exe Users
Topic: DataBase Commands
Replies: 6
Views: 2695

Re: DataBase Commands

Actually, I've to run about 48000 NTHs in wich I apply two sequential records to a 7floor-8span building modeled with limit state material. I'll use a grid computer to run parallel analyses and, given that the RAMs used by OpenSees always increases also if the single NTH is complete, I would like to...
by xantis85
Thu May 29, 2014 2:52 am
Forum: OpenSees.exe Users
Topic: DataBase Commands
Replies: 6
Views: 2695

Re: DataBase Commands

In this zeroLength element I got two uniaxialMaterial elastic (with very high stiffness) and a Pinching4 material. If I eliminate the Pinching4 material the commands work. The problem is that I'm trying to use a joints scissor model that provides each parameter for this material. Can the commands Da...
by xantis85
Thu May 29, 2014 2:42 am
Forum: OpenSees.exe Users
Topic: Analysis Stops Without any Warning, Re-Analyze is OK!
Replies: 5
Views: 1539

Re: Analysis Stops Without any Warning, Re-Analyze is OK!

Hi, I've the same problem when I'm trying to use Opensees parallel to perform Incremental Dynamic Analyses for several earthquakes. Every time that a single Nonlinear Time Hystory is complete, the RAM memory required however increases unless i close the program. I also tried to erase model and outpu...
by xantis85
Sat May 17, 2014 10:44 am
Forum: OpenSees.exe Users
Topic: CstateFlag
Replies: 5
Views: 1296

Re: CstateFlag

I'm trying several combinations for the recorder, but I've no output. If I have a zerolength element with tag 1111 and the tag for shear limit state material associated to this element is 3111, in order to record in real time the CstateFlag, have I to write: set CstFlag [eleResponse 1111 stateFlag] ...
by xantis85
Fri May 16, 2014 1:56 am
Forum: OpenSees.exe Users
Topic: DataBase Commands
Replies: 6
Views: 2695

DataBase Commands

Hi , I'm trying to use the DataBase command in order to allow the use of save and restore commands for my model. I tried this command with related command "save" on a small model and it worked, but when I'm trying to use with a bigger model, using the same materials and elements, this command gives ...
by xantis85
Thu May 15, 2014 10:41 am
Forum: OpenSees.exe Users
Topic: CstateFlag
Replies: 5
Views: 1296

Re: CstateFlag

Could you please write which command sintax I have to use to ask for stateFlag?

Thank you in advance for your help.
Marco
by xantis85
Fri May 09, 2014 4:10 pm
Forum: OpenSees.exe Users
Topic: CstateFlag
Replies: 5
Views: 1296

CstateFlag

Hello, I would like to know the "state flag" for the Limit State Material in real-time during a Nonlinear Time History analysis (i.e. if the limit state curve has been reached for the element considered). The "print" command allow to plot at each step something similar: Element: 1111 type: ZeroLengt...