Search found 152 matches

by sb1966
Wed Aug 23, 2017 4:28 am
Forum: OpenSees.exe Users
Topic: How to apply cyclic load on shallow foundation in OpenSees?
Replies: 3
Views: 1625

Re: How to apply cyclic load on shallow foundation in OpenSe

dasgovind wrote: > Hello. Thanks for replying. I have applied a pulse of 100000 cycles "timeseries pulse > 1 0 100000 -factor 70". Is there anything regarding Rayleigh damping. ? I have not > applied any Rayleigh damping. Hi, It seems you have not specified any period for the applied pulse. Kindly s...
by sb1966
Sun Aug 20, 2017 7:45 am
Forum: OpenSees.exe Users
Topic: How to apply cyclic load on shallow foundation in OpenSees?
Replies: 3
Views: 1625

Re: How to apply cyclic load on shallow foundation in OpenSe

Hi,
Kindly check the duration of your applied pulse. Does your applied cyclic load continue beyond 1000 sec? If no, then it is natural to have more or less constant value, since BNWF has dampers attached.
by sb1966
Wed Aug 02, 2017 9:45 am
Forum: OpenSees.exe Users
Topic: nDmaterial ManzariDafalias in version 2.5.0
Replies: 4
Views: 1518

Re: nDmaterial ManzariDafalias in version 2.5.0

Hi,

I have not myself used ManzariDafalias model earlier and hence it is not possible for me to tell you something definitive. In that case I think it is better to contact Prof Arduino.

Good luck.
by sb1966
Wed Aug 02, 2017 5:23 am
Forum: OpenSees.exe Users
Topic: nDmaterial ManzariDafalias in version 2.5.0
Replies: 4
Views: 1518

Re: nDmaterial ManzariDafalias in version 2.5.0

Hi,

Please refer to change log (http://opensees.berkeley.edu/OpenSees/changeLog.php) for the difference. It says:
"ManzariDafalias updated wth new staggering method and line search algorithms by P. Arduino (UW) ".

Hope this clarifies the issue.
by sb1966
Thu Jul 27, 2017 6:22 am
Forum: OpenSees.exe Users
Topic: A new OpenSEES model tool named OSLite
Replies: 40
Views: 9826

Re: A new OpenSEES model tool named OSLite

Dear Zackchen,

Thanks a lot for the source code uploaded.

It would be of great value, to have the INSTALLATION instructions in English for Non-Chinese users like me.

Thank you once more for your very useful contribution to the community.

Best Wishes.
by sb1966
Wed Jul 26, 2017 7:25 am
Forum: OpenSees.exe Users
Topic: A new OpenSEES model tool named OSLite
Replies: 40
Views: 9826

Re: A new OpenSEES model tool named OSLite

Dear Zackchen, I searched GitHub for the source code of your beautiful program OSLite, as you informed earlier about its posting during June, 2017. But I could not find it there. I am eagerly waiting for Linux version of your very useful software or for the source code with compile instructions. Hop...
by sb1966
Fri Jul 21, 2017 2:59 am
Forum: OpenSees.exe Users
Topic: question about 2D soil modelling
Replies: 5
Views: 1621

Re: question about 2D soil modelling

mahsashamsaei wrote: > thank you for your answering > i use nd material when i analyzed stage 0 and dynamic analyze, converges > can i ignore update stage 1 or ignore gravity analyze? > > i have another question > i model pipe line with nonlinear beam column with unixial material steel 02 > when i a...
by sb1966
Tue Jul 18, 2017 4:58 am
Forum: OpenSees.exe Users
Topic: question about 2D soil modelling
Replies: 5
Views: 1621

Re: question about 2D soil modelling

Does it converge without updating the material stage? If it does not, then please check your model, particularly the BCs. If you use InitialState Wrapper material, take care that you use the material tag corresponding to the initialState Wrapper and not the tag for original nDMaterial, while updatin...
by sb1966
Tue Jul 18, 2017 4:51 am
Forum: OpenSees.exe Users
Topic: energy dissipated through Rayleigh damping
Replies: 2
Views: 996

Re: energy dissipated through Rayleigh damping

Hi, This might not be an exact response to the question. However, it is possible to determine the Damping ratio by measuring the area within a particular hysteretic loop. For this, (a) one may use an element recorder to record the (shear) stress and (shear) strain and (b) then calculate the area wit...
by sb1966
Thu Mar 30, 2017 11:30 am
Forum: OpenSees.exe Users
Topic: How to use PVDRecorder (Version 2.5.0. Release Tag 6236
Replies: 13
Views: 4971

Re: [Solved] How to use PVDRecorder

Hi all, Finally I could locate the problem. I was using the unncessary input argument 'material' in the command. An example of correct command would be: recorder pvd $fileName <disp> <vel> <accel> <eleResponse stress > recorder pvd $fileName1 <disp> <vel> <accel> <eleResponse strain> To repeat, note...
by sb1966
Thu Mar 30, 2017 11:16 am
Forum: OpenSees.exe Users
Topic: Soil structure interaction
Replies: 1
Views: 840

Re: Soil structure interaction

Hi, As I understand your question, you are interested in frequency domain analysis of soil-structure interaction which is valid only in Linear soil-structure system. On the other hand OpenSees is designed/tailored for time domain analysis of non-linear soil-structure system, to be useful in performa...
by sb1966
Mon Mar 27, 2017 11:08 pm
Forum: OpenSees.exe Users
Topic: How to mark a previous topic as "[SOLVED]" ?
Replies: 2
Views: 933

Re: How to mark a previous topic as "[SOLVED]" ?

Dear fmk,

Thanks for your reply.

Warm regards.
by sb1966
Sun Mar 26, 2017 8:29 am
Forum: OpenSees.exe Users
Topic: How to mark a previous topic as "[SOLVED]" ?
Replies: 2
Views: 933

How to mark a previous topic as "[SOLVED]" ?

Dear All,
I wonder if there is a way to mark a previous topic as "[SOLVED]" by editing the title.
I think, once solved, it is useful to mark so. This will be useful in avoiding posts partially repeated/related to earlier posts. Such provision exists in many other forums.

Regards.
by sb1966
Wed Mar 22, 2017 8:47 am
Forum: Framework
Topic: Proposal to Implement Scaled Boundary FE Method in OS
Replies: 1
Views: 1013

Re: Proposal to Implement Scaled Boundary FE Method in OS

Hi all,

May I have some advice from my learned forum members?

Any comment depicting the strength/weaknesses of the proposal and suggestions thereon will be highly appreciated.

Thanks and regards.
by sb1966
Sun Mar 19, 2017 8:03 am
Forum: Framework
Topic: Proposal to Implement Scaled Boundary FE Method in OS
Replies: 1
Views: 1013

Proposal to Implement Scaled Boundary FE Method in OS

Dear fmk and all, I would like to implement Scaled Boundary Finite Element method (SBFEM)[Wolf, 2003; Wolf and Song, 2000; Song and Wolf, 1996] in OpenSees. As is well known, SBFEM combines the advantages of FEM and Boundary Element Method (BEM), while disadvantages of both are avoided. This method ...