SensitivityIntegrator Command: Difference between revisions

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: Haukaas T., Der Kiureghian A. (2004). “Finite element reliability and sensitivity methods for performance-based earthquake
: Haukaas T., Der Kiureghian A. (2004). “Finite element reliability and sensitivity methods for performance-based earthquake
: engineering.” Report No. 2003/14, Pacific Earthquake Engineering Research Center, April 2004.  
: engineering.” Report No. 2003/14, Pacific Earthquake Engineering Research Center, April 2004.  


    
    
: Haukaas T., Der Kiureghian A. (2005). “Parameter sensitivity and importance measures in nonlinear finite element reliability
: Haukaas T., Der Kiureghian A. (2005). “Parameter sensitivity and importance measures in nonlinear finite element reliability
: analysis.” Journal of Engineering Mechanics (ASCE), 131(10):1013-1026.
: analysis.” Journal of Engineering Mechanics (ASCE), 131(10):1013-1026.

Revision as of 01:09, 13 March 2011





For static analysis, the only option currently available is the following, which must be defined before the ‘analysis’ command.
sensitivityIntegrator -static
For the dynamic case, currently only the Newmark algorithm is available. Two command need to be used together:
integrator NewmarkWithSensitivity $gamma $beta

$gamma Newmark parameter gamma.
$beta Newmark parameter beta.
sensitivityIntegrator -definedAbove
Currently, ‘-definedAbove’ is the only option available in OpenSees. This means that the same integration scheme (i.e.,
‘NewmarkWithSensitivity’) is used to perform both response and response sensitivity analysis.



Reference:
Haukaas T., Der Kiureghian A. (2004). “Finite element reliability and sensitivity methods for performance-based earthquake
engineering.” Report No. 2003/14, Pacific Earthquake Engineering Research Center, April 2004.


Haukaas T., Der Kiureghian A. (2005). “Parameter sensitivity and importance measures in nonlinear finite element reliability
analysis.” Journal of Engineering Mechanics (ASCE), 131(10):1013-1026.