Hello every body
I use of "frictionModel VelNormalFrcDep $frnTag $aSlow $nSlow $aFast $nFast $alpha0 $alpha1 $alpha2 $maxMuFact " command but not run in Tcl and when I use of other command for friction model software being run and hasnot problem?????????
Why??????
This command is false????????????????????????
Error in program is = WARNING could not create friction model VelNormalFrcDep
please help me
Link of this command:
http://opensees.berkeley.edu/wiki/index ... t_Friction
Not run-WARNING
Moderators: silvia, selimgunay, Moderators
-
aschellenberg
- Posts: 28
- Joined: Fri Aug 22, 2008 2:30 pm
- Location: UC Berkeley
- Contact:
Re: Not run-WARNING
This command should work fine in the latest OpenSees v2.4.5.
Please try to run one of the examples that are on the OpenSees Wiki which use the VelNormalFrcDep friction model.
Several examples can be found here:
http://opensees.berkeley.edu/wiki/index ... um_Element
Try this example first:
http://opensees.berkeley.edu/wiki/image ... iction.tcl
Please try to run one of the examples that are on the OpenSees Wiki which use the VelNormalFrcDep friction model.
Several examples can be found here:
http://opensees.berkeley.edu/wiki/index ... um_Element
Try this example first:
http://opensees.berkeley.edu/wiki/image ... iction.tcl
-
engnomran
- Posts: 55
- Joined: Fri Jul 04, 2014 9:57 pm
- Location: International Institute of Earthquake Engineering and Seismology(IIEES)
Re: Not run-WARNING
Thank you Mr aschellenberg
I model a bridge and bearing with " flat slider bearing" command in opensees(3D).
I do time history analyze for 3direction earthquake.
Material's isolator is Teflon.
I want use " Velocity and Normal Force Dependent Friction " command for friction model.
μSlow = aSlow*N^(nSlow-1)
μFast = aFast*N^(nFast-1)
μ = μFast - (μFast-μSlow )*exp(-a*udot)
a = α0 + α1*N + α2*N^2
μ is dependent of velocity and vertical force cause to I should have α0(alpha0) , α1(alpha1) , α2(alpha2) , aSlow , aFast , nFast , nSlow
but I can not find these inputs.
Can I use properties in under reference???
Dead Load on isolators is Max=1421500 N(newton) and Min=433987N
reference : Dao ND, Ryan KL, Sato E, Sasaki T. Predicting the displacement of triple pendulum™ bearings in a full-scale shaking experiment using a three-dimensional element. Earthquake Engineering and Structural Dynamics, 2013.
Do you use of other properties in under example????????
http://opensees.berkeley.edu/wiki/image ... iction.tcl
Are properties different with different load normal????
please help me????
I need α0(alpha0) , α1(alpha1) , α2(alpha2) , aSlow , aFast , nFast , nSlow ????
I model a bridge and bearing with " flat slider bearing" command in opensees(3D).
I do time history analyze for 3direction earthquake.
Material's isolator is Teflon.
I want use " Velocity and Normal Force Dependent Friction " command for friction model.
μSlow = aSlow*N^(nSlow-1)
μFast = aFast*N^(nFast-1)
μ = μFast - (μFast-μSlow )*exp(-a*udot)
a = α0 + α1*N + α2*N^2
μ is dependent of velocity and vertical force cause to I should have α0(alpha0) , α1(alpha1) , α2(alpha2) , aSlow , aFast , nFast , nSlow
but I can not find these inputs.
Can I use properties in under reference???
Dead Load on isolators is Max=1421500 N(newton) and Min=433987N
reference : Dao ND, Ryan KL, Sato E, Sasaki T. Predicting the displacement of triple pendulum™ bearings in a full-scale shaking experiment using a three-dimensional element. Earthquake Engineering and Structural Dynamics, 2013.
Do you use of other properties in under example????????
http://opensees.berkeley.edu/wiki/image ... iction.tcl
Are properties different with different load normal????
please help me????
I need α0(alpha0) , α1(alpha1) , α2(alpha2) , aSlow , aFast , nFast , nSlow ????