Velocity and Pressure Dependent Friction: Difference between revisions

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{{CommandManualMenu}}
{{CommandManualMenu}}


This command is used to construct an VPDependent friction model object.
This command is used to construct a VelPressureDep friction model object.


{|  
{|  
| style="background:yellow; color:black; width:800px" | '''frictionModel VPDependent $frnTag $muSlow $muFast0 $A $deltaMu $alpha $transRate'''
| style="background:lime; color:black; width:800px" | '''frictionModel VelPressureDep $frnTag $muSlow $muFast0 $A $deltaMu $alpha $transRate'''
|}
|}


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| '''$A''' || nominal contact area
| '''$A''' || nominal contact area
|-
|-
| '''$deltaMu''' || pressure parameter
| '''$deltaMu''' || pressure parameter calibrated from experimental data
|-
|-
| '''$alpha''' || pressure parameter
| '''$alpha''' || pressure parameter calibrated from experimental data
|-
|-
| '''$transRate''' || transition rate from low to high velocity
| '''$transRate''' || transition rate from low to high velocity
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EXAMPLES:
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EXAMPLE:
 
frictionModel VelPressureDep 1 0.085 0.163 7.0686 0.05 0.08 0.77
 
 
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REFERENCES:
 
[1] Tsopelas P., and Constantinou M. C. (1996). "Experimental Study of FPS System in Bridge Seismic Isolation." Earthquake Eng. and Structural Dynamics, VOL. 25, 65-78.
 
[2] Constantinou M. C., Tsopelas P., Kasalanati A., and Wolff E. D. (1999). Property Modification Factors for Seismic Isolation Bearings. Technical Report MCEER-99-0012, University of Buffalo, Buffalo, New York.
 
 
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RELATED TO:


frictionModel VPDependent 1 1 2 20.0 2.50 0.02 -P 1 -Mz 2;
* [http://opensees.berkeley.edu/wiki/index.php/Flat_Slider_Bearing_Element Flat Slider Bearing Element]
* [http://opensees.berkeley.edu/wiki/index.php/Single_Friction_Pendulum_Bearing_Element Single Friction Pendulum Bearing Element]
* [http://opensees.berkeley.edu/wiki/index.php/Triple_Friction_Pendulum_Element Triple Friction Pendulum Bearing Element]




Latest revision as of 20:06, 18 September 2014



This command is used to construct a VelPressureDep friction model object.

frictionModel VelPressureDep $frnTag $muSlow $muFast0 $A $deltaMu $alpha $transRate
$frnTag unique friction model object tag
$muSlow coefficient of friction at low velocity
$muFast0 initial coefficient of friction at high velocity
$A nominal contact area
$deltaMu pressure parameter calibrated from experimental data
$alpha pressure parameter calibrated from experimental data
$transRate transition rate from low to high velocity


EXAMPLE:

frictionModel VelPressureDep 1 0.085 0.163 7.0686 0.05 0.08 0.77


REFERENCES:

[1] Tsopelas P., and Constantinou M. C. (1996). "Experimental Study of FPS System in Bridge Seismic Isolation." Earthquake Eng. and Structural Dynamics, VOL. 25, 65-78.

[2] Constantinou M. C., Tsopelas P., Kasalanati A., and Wolff E. D. (1999). Property Modification Factors for Seismic Isolation Bearings. Technical Report MCEER-99-0012, University of Buffalo, Buffalo, New York.


RELATED TO:


Code Developed by: Andreas Schellenberg, University of California, Berkeley.

Retrieved from "https://opensees.ist.berkeley.edu/wiki/index.php?title=Velocity_and_Pressure_Dependent_Friction&oldid=11396"