Search found 118 matches

by andrett7
Mon Jul 06, 2015 5:52 am
Forum: OpenSees.exe Users
Topic: Analytical equations for Pinching4 material
Replies: 4
Views: 1045

Re: Analytical equations for Pinching4 material

Thank you, I'll check.

Andrea
by andrett7
Sun Jun 28, 2015 11:10 pm
Forum: OpenSees.exe Users
Topic: Analytical equations for Pinching4 material
Replies: 4
Views: 1045

Re: Analytical equations for Pinching4 material

Hi Gor,

thanks for your replay. I will play a little bit.

Grazie mille
by andrett7
Sat Jun 27, 2015 1:34 am
Forum: OpenSees.exe Users
Topic: Analytical equations for Pinching4 material
Replies: 4
Views: 1045

Analytical equations for Pinching4 material

Dear all,

I'm interested in looking at the analytical equations which govern the change in state of the Pinching4 material. Where I can find it?

Thanks for the attention.

Andrea
by andrett7
Fri Jun 12, 2015 8:17 am
Forum: OpenSees.exe Users
Topic: Coulomb friction
Replies: 1
Views: 1493

Re: Coulomb friction

Now I have a linear decrease of the amplitude, but when the restoring force is lower than the friction forces there are vibrations (with constant amplitude) instead to have a constant residual displacement. Someone can help me? Thanks Below there is an update of the code: wipe; source Units.tcl mode...
by andrett7
Mon Apr 06, 2015 5:55 am
Forum: OpenSees.exe Users
Topic: Coulomb friction
Replies: 1
Views: 1493

Coulomb friction

Hi all, I want to simulate the Coulomb friction between two nodes. Below you can find an example of 1DOF system with a initial displacement (1.5 m) and after that free vibration. Following theory ( see e.g. Chopra book) at each cycle the displacement should have a linear decrease, and finaly a perma...
by andrett7
Fri Mar 13, 2015 1:24 am
Forum: Parallel Processing
Topic: No action after mpiexec -np $n OpenSeesSP $filename
Replies: 7
Views: 3077

Re: No action after mpiexec -np $n OpenSeesSP $filename

Dear Frank,

i downloaded the latest version of OpenSeesSP 64 bit available on the website, and my operating system is windows 8.1 64 bit.

Thanks for the replay.

Andrea
by andrett7
Thu Mar 05, 2015 9:06 am
Forum: Parallel Processing
Topic: No action after mpiexec -np $n OpenSeesSP $filename
Replies: 7
Views: 3077

No action after mpiexec -np $n OpenSeesSP $filename

Dear all,

i installed all the files to use a parallel processing but when i write mpiexec -np $n OpenSeesSP $filename no action occurs. Simply i go to the next line in the command window.

What is the problem?

Thanks in advance,
Andrea
by andrett7
Sat Feb 21, 2015 2:50 am
Forum: OpenSees.exe Users
Topic: Cladding elements and frame structure
Replies: 4
Views: 1173

Re: Cladding elements and frame structure

Ok, I solved in this way: set Quad quad set thick 0.18 set mat 30 if {$Quad == "enhancedQuad" } { set eleArgs "PlaneStress2D 1" } if {$Quad == "quad" } { set eleArgs "$thick PlaneStress2D $mat" } if {$Quad == "bbarQuad" } { set eleArgs "1" } set nx 16 set ny 4 set start 0. set blockCmd "block2D $nx ...
by andrett7
Sat Feb 21, 2015 2:37 am
Forum: OpenSees.exe Users
Topic: Cladding elements and frame structure
Replies: 4
Views: 1173

Re: Cladding elements and frame structure

Why if I use this sintax: set nx 16 set ny 4 set start 0. block2D $nx $ny 1 1 $Quad $eleArgs { 1 $start $start 2 40 0 3 40 10 4 0 10 } There is the following error: WARNING block2D numX? numY? startNode? startEle? eleType? eleArgs? : invalid node coordinate for node: 1 expected floating-point number...
by andrett7
Fri Feb 20, 2015 1:06 am
Forum: OpenSees.exe Users
Topic: Eigenvalue analysis for frame structures with cladding panel
Replies: 2
Views: 819

Re: Eigenvalue analysis for frame structures with cladding p

Ok, I will wait the structural response.

Thanks,
Andrea
by andrett7
Fri Feb 20, 2015 1:03 am
Forum: OpenSees.exe Users
Topic: Cladding elements and frame structure
Replies: 4
Views: 1173

Re: Cladding elements and frame structure

Thanks Dr. McKenna.

Andrea
by andrett7
Wed Feb 18, 2015 11:53 pm
Forum: OpenSees.exe Users
Topic: Eigenvalue analysis for frame structures with cladding panel
Replies: 2
Views: 819

Eigenvalue analysis for frame structures with cladding panel

Dear all, i want to perform different nonlinear analyses on a frame structure with lots of cladding panels, so i need to perform an eigenvalue analysis. The masses are not distributed but simply concentrated on the top of the columns (5) but still the eigenvalue analysis is quite long. Is there a po...
by andrett7
Tue Feb 17, 2015 2:00 am
Forum: OpenSees.exe Users
Topic: Cladding elements and frame structure
Replies: 4
Views: 1173

Cladding elements and frame structure

Hi all, I want to model a precast building (in 2D) which includes beams, columns and cladding elements, for which i want to use quad elements and block2D command. However i have this error: WARNING block2D numX? numY? startNode? startEle? eleType? eleArgs? : invalid number of node args: PlaneStress ...
by andrett7
Fri Mar 21, 2014 5:24 am
Forum: OpenSees.exe Users
Topic: Matlab and OpenSees using NeesHub
Replies: 10
Views: 3248

Re: Matlab and OpenSees using NeesHub

Many thanks.

Andrea
by andrett7
Thu Mar 20, 2014 3:33 am
Forum: OpenSees.exe Users
Topic: Matlab and OpenSees using NeesHub
Replies: 10
Views: 3248

Re: Matlab (Octave) and OpenSees using NeesHub

I found that exec octave -r "FileName.m" does not work. Is there an equivalent command for Octave?

Thanks in advance