.. include:: sub.txt =================== SAWS Material =================== .. function:: uniaxialMaterial('SAWS', matTag, F0, FI, DU, S0, R1, R2, R3, R4, alpha, beta) :noindex: 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. =================================== =========================================================================== ``matTag`` |int| integer tag identifying material ``F0`` |float| Intercept strength of the shear wall spring element for the asymtotic line to the envelope curve F0 > FI > 0 ``FI`` |float| Intercept strength of the spring element for the pinching branch of the hysteretic curve. (FI > 0). ``DU`` |float| Spring element displacement at ultimate load. (DU > 0). ``S0`` |float| Initial stiffness of the shear wall spring element (S0 > 0). ``R1`` |float| 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`` |float| Stiffness ratio of the descending branch of the spring element envelope curve. The slope of this line is R2 S0. ( R2 < 0). ``R3`` |float| Stiffness ratio of the unloading branch off the spring element envelope curve. The slope of this line is R3 S0. ( R3 1). ``R4`` |float| Stiffness ratio of the pinching branch for the spring element. The slope of this line is R4 S0. ( R4 > 0). ``alpha`` |float| Stiffness degradation parameter for the shear wall spring element. (ALPHA > 0). ``beta`` |float| Stiffness degradation parameter for the spring element. (BETA > 0). =================================== =========================================================================== .. seealso:: `Notes `_