Search found 21 matches

by huzb
Sat Aug 26, 2017 7:04 pm
Forum: OpenSees.exe Users
Topic: warning of modal analysis
Replies: 1
Views: 551

warning of modal analysis

hi all Followin warnings were encountered when running modal analysis of a -ndm 2 -ndf 3 structure. WARNING DOF_Group::setID - invalid location 3 in ID of size 3 WARNING DOF_Group::setID - invalid location 4 in ID of size 3 WARNING DOF_Group::setID - invalid location 5 in ID of size 3 WARNING DOF_Gr...
by huzb
Wed Aug 23, 2017 11:59 pm
Forum: OpenSees.exe Users
Topic: pushover with a soft horizontal link
Replies: 6
Views: 2478

Re: pushover with a soft horizontal link

Thank you. I try the following method these days. But it failed at first iteration. Could you give me some suggestions? wipe puts "System" model basic -ndm 2 -ndf 3 puts "node" node 1 -1.650E+004 0.000E+000 node 2 -1.650E+004 3.800E+003 node 5 -7.500E+003 3.800E+003 node 212 -7.500E+003 0.000E+000 n...
by huzb
Thu Aug 17, 2017 4:38 am
Forum: OpenSees.exe Users
Topic: pushover with a soft horizontal link
Replies: 6
Views: 2478

Re: pushover with a soft horizontal link

Thank you very much.
The soft horizontal link method was suggested by a master thesis. So I think it is reasonable and try to use it. I don't know if there are some problems in my model.
by huzb
Wed Aug 16, 2017 3:04 am
Forum: OpenSees.exe Users
Topic: pushover with a soft horizontal link
Replies: 6
Views: 2478

Re: pushover with a soft horizontal link

I would like to do modal pushover of a tall building and need to obtaine the descending part of pushover curves for collapse analysis. For higher modes lateral loads (such as the 2nd modes), it is difficult to obtaine the descending part by applying loads on nodes of the building. So I try to use th...
by huzb
Wed Aug 16, 2017 1:20 am
Forum: OpenSees.exe Users
Topic: pushover with a soft horizontal link
Replies: 6
Views: 2478

pushover with a soft horizontal link

Dear all I would like to do a pushover analysis of a single story frame. There is a horizontal truss element connect with the beam of the frame. The lateral load is applied on the truss element by sp command. The analysis failed to converge. It seems like the constraint of the loading point had some...
by huzb
Sat Jul 08, 2017 1:02 am
Forum: OpenSees.exe Users
Topic: eigen analysis for mass spring system
Replies: 10
Views: 4019

Re: eigen analysis for mass spring system

ok, thank you
by huzb
Thu Jul 06, 2017 7:31 pm
Forum: OpenSees.exe Users
Topic: eigen analysis for mass spring system
Replies: 10
Views: 4019

Re: eigen analysis for mass spring system

Thank you very much Jhno.
Do you know how to set the P-Delta for Two Node Link Element or is there any document such as user's manual to introduce it. I do not understand clealy the instruction on the website “http://opensees.berkeley.edu/wiki/index ... nk_Element”.
by huzb
Fri Jun 30, 2017 5:20 am
Forum: OpenSees.exe Users
Topic: eigen analysis for mass spring system
Replies: 10
Views: 4019

Re: eigen analysis for mass spring system

What is the difference between 'localDisplacement' and 'basicDisplacement'? Does the former one mean the relative displacement between the two nodes of the link element?
by huzb
Fri Jun 30, 2017 3:22 am
Forum: OpenSees.exe Users
Topic: eigen analysis for mass spring system
Replies: 10
Views: 4019

Re: eigen analysis for mass spring system

Dear, Jhno
Thank you very much.
by huzb
Wed Jun 28, 2017 7:30 pm
Forum: OpenSees.exe Users
Topic: eigen analysis for mass spring system
Replies: 10
Views: 4019

Re: eigen analysis for mass spring system

Dear, Jhno Thank you for your inspiring answer. I replaced uniaxialMaterial MultiLinear with uniaxialMaterial Steel01 and it worked. But I can only obtaine the first three natural periods of the structure. Actually it should have 4 periods. code: wipe all model BasicBuilder -ndm 2 -ndf 3 node 1 0. 0...
by huzb
Wed Jun 28, 2017 3:07 am
Forum: OpenSees.exe Users
Topic: eigen analysis for mass spring system
Replies: 10
Views: 4019

eigen analysis for mass spring system

hi~ I encounter the following problem during eigen analysis ArpackSolver::Error with _saupd info = -3 NCV must be greater than NEV and less than or equal to N. WARNING DirectIntegrationAnalysis::eigen() - EigenSOE failed in solve() code wipe all; model BasicBuilder -ndm 2 -ndf 3 node 1 0. 0. node 2 ...
by huzb
Tue Sep 15, 2015 7:31 pm
Forum: OpenSees.exe Users
Topic: could not create uniaxialMaterial SteelMPF
Replies: 7
Views: 1887

Re: could not create uniaxialMaterial SteelMPF

fmk wrote: > you need to update thanks fmk i update the software and the problem is solved. but another problem comes. OpenSees > source dispControl.tcl WARNING BandGenLinLapackSolver::solve() -LAPACK routine returned 2 WARNING NewtonRaphson::solveCurrentStep() -the LinearSysOfEqn failed in solve() ...
by huzb
Tue Sep 15, 2015 6:31 am
Forum: OpenSees.exe Users
Topic: could not create uniaxialMaterial SteelMPF
Replies: 7
Views: 1887

Re: could not create uniaxialMaterial SteelMPF

fmk wrote:
> tell me the version and revision number that spits out when you star the
> exe
2.4.4<rev 5774>
by huzb
Sun Sep 13, 2015 12:41 am
Forum: OpenSees.exe Users
Topic: could not create uniaxialMaterial SteelMPF
Replies: 7
Views: 1887

Re: could not create uniaxialMaterial SteelMPF

fmk wrote: > are you using the latest version of the code as the following example the > authors provided works fine: > uniaxialMaterial SteelMPF 1 60 60 29000 0.02 0.02 20.0 18.5 0.15 thanks fmk The Input Format of code is in in accordance with the example, like # STEEL ...............................
by huzb
Thu Aug 27, 2015 1:16 am
Forum: OpenSees.exe Users
Topic: could not create uniaxialMaterial SteelMPF
Replies: 7
Views: 1887

could not create uniaxialMaterial SteelMPF

Hi all,

When i run the code of an example (http://opensees.berkeley.edu/wiki/index ... r_RC_Walls), encounter the warning 'could not create uniaxialMaterial SteelMPF'. How could i solve the problem?

thanks