Search found 5860 matches

by fmk
Thu Jun 28, 2018 9:48 am
Forum: OpenSees.exe Users
Topic: Can we apply dynamic load using Opensees?
Replies: 8
Views: 1047

Re: Can we apply dynamic load using Opensees?

create a load pattern with a single load on the node you wish to apply the load to .. the load actually applied during the transient analysis will be the value of the load at the node (the pseudo load) TIMES the load factor obtained from the time series.
by fmk
Tue Jun 19, 2018 3:24 am
Forum: OpenSees.exe Users
Topic: Error using "nDMaterial FAReinforcedConcretePlaneStress"
Replies: 9
Views: 934

Re: Error using "nDMaterial FAReinforcedConcretePlaneStress"

these materials cause problems .. i have some newer materials for modeling walls .. you might even try forgetting the beam elements with these .. here is some code copied from an example put together by Dr. Petrone # Concrete # Parameters for the new concrete model set E [expr 36900e6*$Pa] ;#elastic...
by fmk
Tue Jun 19, 2018 3:19 am
Forum: OpenSees.exe Users
Topic: Modeshape Plots not Responding
Replies: 2
Views: 259

Re: Modeshape Plots not Responding

yes .. we can't really keep the graphics parts operational .. best record them and use matlab
by fmk
Tue Jun 19, 2018 3:17 am
Forum: OpenSees.exe Users
Topic: learning the source code
Replies: 1
Views: 235

Re: learning the source code

go read my dissertation, ignore chapters on parallel programming

opensees.berkeley.edu/OpenSees/doc/fmkdiss.pdf
by fmk
Tue Jun 19, 2018 3:15 am
Forum: OpenSees.exe Users
Topic: Recorder behaviour
Replies: 4
Views: 281

Re: Recorder behaviour

don't use a recorder at all .. get whatever quanaty you are recording from the command line and write them to a file.
by fmk
Fri Jun 08, 2018 8:50 am
Forum: Parallel Processing
Topic: system sparseSYM
Replies: 1
Views: 395

Re: system sparseSYM

how do results compare with Umfpack
by fmk
Fri Jun 08, 2018 8:50 am
Forum: Parallel Processing
Topic: How to Exit Parallel Computing in OpenSeesMP
Replies: 3
Views: 589

Re: How to Exit Parallel Computing in OpenSeesMP

no .. but just end all but 1 processor, e.g.

# do parallel stuff
if {$myID == 0} {
# do sequential stuff
}
by fmk
Fri Jun 08, 2018 8:48 am
Forum: Framework
Topic: Meaning of "getCommittedStrain" , "getCommittedStress"
Replies: 1
Views: 266

Re: Meaning of "getCommittedStrain" , "getCommittedStress"

the prupose of 1 analysis step is to find the next converged stp, given the current converged step. In the nonlinear analysis the model usually will go through a number of trial steps. these are not on the solution path, but trial solution points. If the convergence test is satisfied at a given tria...
by fmk
Fri Jun 08, 2018 8:44 am
Forum: Framework
Topic: Problem with running disp.out and force.out command :) :?
Replies: 3
Views: 364

Re: Problem with running disp.out and force.out command :)

it works fine for me .. what version and operating system are you using?
by fmk
Fri Jun 08, 2018 8:42 am
Forum: Framework
Topic: Developer using Linux
Replies: 2
Views: 416

Re: Developer using Linux

what version of linux and what version of OpenSees did you build.
by fmk
Fri Jun 08, 2018 8:38 am
Forum: OpenSees.exe Users
Topic: Penalty for Zero Length Contact Element
Replies: 2
Views: 274

Re: Penalty for Zero Length Contact Element

these are penalty factors that enforce the constraing .. it depends on the model you have. you want something large enough to enforce the constraint (as number goes towards infinity the constraint is enforced exactly) , but not too large to effect the conditioning of the global stiffness matrix and ...
by fmk
Fri Jun 08, 2018 8:34 am
Forum: OpenSees.exe Users
Topic: Queries to a Zero Length Contact Element
Replies: 2
Views: 201

Re: Queries to a Zero Length Contact Element

force, stiff, pressure, gap if 2d just force and stiff if 3d.
by fmk
Fri Jun 08, 2018 8:28 am
Forum: OpenSees.exe Users
Topic: How to calculate displacements at the integration points?
Replies: 4
Views: 459

Re: How to calculate displacements at the integration points

you might want to look at the source code for the element .. as Selim mentioned, the disp beam element assumes linear curvature and constant axial deformation along the length .. the equations are pretty standard for beams, they can be seen here: http://opensees.berkeley.edu/wiki/images/c/c5/FBEvsDB...
by fmk
Fri Jun 08, 2018 8:11 am
Forum: OpenSees.exe Users
Topic: bug in time outputs
Replies: 1
Views: 236

Re: bug in time outputs

what exactly are you expecting .. the time, given your model, is the load factor applied to enforce the constraint.
by fmk
Fri Jun 08, 2018 8:03 am
Forum: OpenSees.exe Users
Topic: ShellDKGT
Replies: 10
Views: 809

Re: ShellDKGT