SAWS Material: Difference between revisions

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This file contains the class definition for  SAWSMaterial.  SAWSMaterial provides the implementation of a one-dimensional hysteretic model develeped as part of the CUREe Caltech wood frame project.  
This file contains the class definition for  SAWSMaterial.  SAWSMaterial provides the implementation of a one-dimensional hysteretic model develeped as part of the CUREe Caltech wood frame project.  


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NOTES:
== Notes: ==


Refer to the figure below for more information, and the reference provided at the end of this page for complete details about modeling assumptions.   
Refer to the figure below for more information, and the reference provided at the end of this page for complete details about modeling assumptions.   
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EXAMPLE FILES:
== Example Files: ==


''Download items here:''
''Click to download files''


[[Media:Test.tcl]]
[[Media:Test.tcl]]


[[Media:SAWSZeroLength.tcl]]
[[Media:SAWSZeroLength.tcl]]
[[Media:TestHysteresis.jpg]]
== Example: Test.tcl ==
[[File:Test.tcl]]
== Example: SAWSZeroLngth.tcl.tcl ==
[[File:SAWSZeroLength.tcl]]


== Example: Hysteresis ==
== Example: Hysteresis ==
[[File:TestHysteresis.jpg]]
[[File:TestHysteresis.jpg|700px]]




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REFERENCES:
== References ==


Reference: Folz, B. and Filiatrault, A. (2001). "SAWS - Version 1.0, A Computer Program for the Seismic Analysis of Woodframe Structures", Structural Systems Research Project Report No. SSRP-2001/09, Dept. of Structural Engineering, UCSD, La Jolla, CA .
Reference: Folz, B. and Filiatrault, A. (2001). "SAWS - Version 1.0, A Computer Program for the Seismic Analysis of Woodframe Structures", Structural Systems Research Project Report No. SSRP-2001/09, Dept. of Structural Engineering, UCSD, La Jolla, CA .

Latest revision as of 21:13, 3 March 2010




This file contains the class definition for SAWSMaterial. SAWSMaterial provides the implementation of a one-dimensional hysteretic model develeped as part of the CUREe Caltech wood frame project.


uniaxialMaterial SAWS $tag $F0 $FI $DU $S0 $R1 $R2 $R3 $R4 $alph $beta

$matTag integer tag identifying material
$F0 Intercept strength of the shear wall spring element for the asymtotic line to the envelope curve F0 > FI > 0
$FI Intercept strength of the spring element for the pinching branch of the hysteretic

curve. (FI > 0).

$DU Spring element displacement at ultimate load. (DU > 0).
$S0 Initial stiffness of the shear wall spring element (S0 > 0).
$R1 Stiffness ratio of the asymptotic line to the spring element envelope curve. The

slope of this line is R1 S0. (0 < R1 < 1.0).

$R2 Stiffness ratio of the descending branch of the spring element envelope curve. The

slope of this line is R2 S0. ( R2 < 0).

$R3 Stiffness ratio of the unloading branch off the spring element envelope curve. The

slope of this line is R3 S0. ( R3 1).

$R4 Stiffness ratio of the pinching branch for the spring element. The slope of this line

is R4 S0. ( R4 > 0).

$alpha Stiffness degradation parameter for the shear wall spring element. (ALPHA > 0).
$beta Stiffness degradation parameter for the spring element. (BETA > 0).


Notes:

Refer to the figure below for more information, and the reference provided at the end of this page for complete details about modeling assumptions.



Example Files:

Click to download files

Media:Test.tcl

Media:SAWSZeroLength.tcl

Example: Hysteresis



References

Reference: Folz, B. and Filiatrault, A. (2001). "SAWS - Version 1.0, A Computer Program for the Seismic Analysis of Woodframe Structures", Structural Systems Research Project Report No. SSRP-2001/09, Dept. of Structural Engineering, UCSD, La Jolla, CA .


Code Developed by: Patxi Uriz, Exponent (Converted from FORTRAN code originally written by Bryan Folz)