The OpenSees Community

Hi Dr. Terzic, Sorry for my late answer. I ran the code that you modified, but the element force output (element 26 in the code, which is the spring) is all zero (except the first column, which is the load applied). P.S.: I was able to find the eigenvalues by utilizing an equivalent EPP material. I ...

# HyperbolicGapMaterial Pushover # units kg - m - N wipe; # clear opensees model model basic -ndm 2 -ndf 3; # 2 dimensions, 3 dof per node # Nodal Coordinates # node $nodeTag (ndm $coords) <-mass (ndf $MassValues)> #Left Deck node 1 0 11.6 # Nodes For Zerolength Element Definition node 27 0 11.6 # M...

# HyperbolicGapMaterial Pushover # units kg - m - N wipe; # clear opensees model model basic -ndm 2 -ndf 3; # 2 dimensions, 3 dof per node # Nodal Coordinates # node $nodeTag (ndm $coords) <-mass (ndf $MassValues)> #Left Deck node 1 0 11.6 # Nodes For Zerolength Element Definition node 27 0 11.6 # T...

Dr. Vesna, Thank you for your reply. I ran a pushover analysis on the Hyperbolic material independently. It turned out with the following error: WARNING bandgenlinlapacksolver::solve() -LAPACK routine returned 1 DisplacementControl::newStep<void> - failed in solver StaticAnalysis::analyze() - the In...

Could this be an issue of the units in recorder? Because the ultimate passive resistance force [Fult] unit in the input of hyperbolicgapmaterial is in terms of [force/m] which means [per meter of abutment width] as indicated in the following page: http://opensees.berkeley.edu/wiki/index.php/Hyperbol...

Dr. Terzic, I appreciate your quick response. I was able to record the force, after I posted my problem here. But this time the forces are smaller than they should be, where the displacements are correct. For instance, I recorded a peak force about 500 kN, but it should be about 7500 kN. So, I went ...

Hi Dr. Terzic, I am having a problem with getting the hysteresis of a Hyperbolic element. I have defined the material and recorders like this: ------------------------------------------------------------------------------------------- node 1 0 10.7 node 21 87.2 10.7 node 27 0 10.7 node 28 87.2 10.7 ...

Thank you for the reply. I solved my problem by using equalDOF at the nodes where I want same displacement and defining the load with "load" command.

Hi all, I have a backwall-embankment system (3D) where soil is surrounded by a steel box. The backwall behavior mode is shear. I want to perform a pushover analysis. The maximum horizontal displacement (X) is 0.15m. Since the behavior mode is shear I need to apply the displacement to all wall nodes ...

Hi, I recently started to use OpenSees soil materials. I'm trying to model a very simple SSI problem between a wall and soil. I followed the steps explained in "Excavation Supported by Cantilevered Sheet Pile Wall". As a result I was able to complete gravity analysis with "InitialStat...