Search found 9 matches

by Katrin
Tue Aug 07, 2007 6:21 am
Forum: Framework
Topic: beam column element source code
Replies: 7
Views: 14187

From looking at the source code I thought that in Opensees the elasticBeamColumn element is implemented as Bernoulli beam and not as Timoshenko beam. Am I mistaken? I was just wandering because Shisha had stated that he had implemented the Timoshenko element in an older version. If anyone could clar...
by Katrin
Sat Apr 28, 2007 7:23 am
Forum: OpenSees.exe Users
Topic: Unequal axial forces in Section 1 and 2 of dispBeamcolumn el
Replies: 3
Views: 6967

Hi Silvia, I am modelling the wall with 9 elements along the height. The lowest I gave the length of the plastic hinge zone because I wanted a linear curvature profile in that zone. I also tried to vary the element length but it had no effect on the axial load. I am very grateful for any ideas what ...
by Katrin
Sat Apr 28, 2007 3:32 am
Forum: OpenSees.exe Users
Topic: Unequal axial forces in Section 1 and 2 of dispBeamcolumn el
Replies: 3
Views: 6967

Unequal axial forces in Section 1 and 2 of dispBeamcolumn el

Hi, I am carrying out transient analysis of a wall where I have modelled the plastic hinge zone with a dispBeamColumn element with 2 integration points. The element has a fibre section of concrete and reinforcement fibres which has been tested with moment-curvature analysis. The analysis is basicall...
by Katrin
Mon Oct 30, 2006 11:24 am
Forum: OpenSees.exe Users
Topic: shear stiffness as a function of the axial force
Replies: 0
Views: 2443

shear stiffness as a function of the axial force

Dear all, I am trying to set up a model of a wall where I want to allow for shear transfer along the base gap only if there is an axial force present. So I was looking for a spring-like element where the stiffness in lateral direction (x) is dependent on the force in vertical direction (z): e.g. kx=...
by Katrin
Sun Aug 06, 2006 4:57 am
Forum: Documentation
Topic: Shear stiffness as a function of axial force
Replies: 3
Views: 8140

Thanks Silvia! I will check their publications.
I assume from your response that there is no obvious way of modelling such a thing in Opensees?
by Katrin
Sat Aug 05, 2006 2:50 am
Forum: Documentation
Topic: Shear stiffness as a function of axial force
Replies: 3
Views: 8140

Shear stiffness as a function of axial force

Hi, I would like to model the shear stiffness of a column element as a function of the axial load in the column. I think I would basically need a spring element which stiffness could be written as a function of the load in a different direction than the spring element acts; I could not find a way of...
by Katrin
Tue Nov 29, 2005 12:07 pm
Forum: OpenSees.exe Users
Topic: Output frequency
Replies: 3
Views: 4778

oops... I just noticed it should have been dT instead of dt - it works with no problems at all.
Thanks again,
Katrin
by Katrin
Tue Nov 29, 2005 12:00 pm
Forum: OpenSees.exe Users
Topic: Output frequency
Replies: 3
Views: 4778

Hi, thanks a lot for your resonse! I tried the following recorder line recorder DOF1.out disp -time -dt 10.0 -node all -dof 1 disp but it did not work (the output file was empty). I also tried the -dt 10.0 at different positions in the command line and with different recorder elements but it never w...
by Katrin
Tue Nov 29, 2005 6:13 am
Forum: OpenSees.exe Users
Topic: Output frequency
Replies: 3
Views: 4778

Output frequency

Hi, I am running some time-history analyses. The analysis comprises many time-steps because I am trying to predict a quasi-static test, which takes very long. I was wondering whether it is possible to output only for example every tenth time step instead of every single one? I am using the recorder ...