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