4.13.5.24. SelfCentering Material¶

uniaxialMaterial('SelfCentering', matTag, k1, k2, sigAct, beta, epsSlip=0, epsBear=0, rBear=k1)

This command is used to construct a uniaxial self-centering (flag-shaped) material object with optional non-recoverable slip behaviour and an optional stiffness increase at high strains (bearing behaviour).

`matTag` (int)	integer tag identifying material
`k1` (float)	Initial Stiffness
`k2` (float)	Post-Activation Stiffness (0< k2``< ``k1)
`sigAct` (float)	Forward Activation Stress/Force
`beta` (float)	Ratio of Forward to Reverse Activation Stress/Force
`epsSlip` (float)	slip Strain/Deformation (if `epsSlip` = 0, there will be no slippage)
`epsBear` (float)	Bearing Strain/Deformation (if `epsBear` = 0, there will be no bearing)
`rBear` (float)	Ratio of Bearing Stiffness to Initial Stiffness `k1`