4.14.1.4. ReinforcingSteel¶

uniaxialMaterial('ReinforcingSteel', matTag, fy, fu, Es, Esh, eps_sh, eps_ult, '-GABuck', lsr, beta, r, gamma, '-DMBuck', lsr, alpha=1.0, '-CMFatigue', Cf, alpha, Cd, '-IsoHard', a1=4.3, limit=1.0, '-MPCurveParams', R1=0.333, R2=18.0, R3=4.0)

This command is used to construct a ReinforcingSteel uniaxial material object. This object is intended to be used in a reinforced concrete fiber section as the steel reinforcing material.

`matTag` (int)	integer tag identifying material
`fy` (float)	Yield stress in tension
`fu` (float)	Ultimate stress in tension
`Es` (float)	Initial elastic tangent
`Esh` (float)	Tangent at initial strain hardening
`eps_sh` (float)	Strain corresponding to initial strain hardening
`eps_ult` (float)	Strain at peak stress
`'-GABuck'` (str)	Buckling Model Based on Gomes and Appleton (1997)
`lsr` (float)	Slenderness Ratio
`beta` (float)	Amplification factor for the buckled stress strain curve.
`r` (float)	Buckling reduction factor r can be a real number between [0.0 and 1.0] r=1.0 full reduction (no buckling) r=0.0 no reduction 0.0<r<1.0 linear interpolation between buckled and unbuckled curves
`gamma` (float)	Buckling constant
`'-DMBuck'` (str)	Buckling model based on Dhakal and Maekawa (2002)
`lsr` (float)	Slenderness Ratio
`alpha` (float)	Adjustment Constant usually between 0.75 and 1.0 Default: alpha=1.0, this parameter is optional.
`'-CMFatigue'` (str)	Coffin-Manson Fatigue and Strength Reduction
`Cf` (float)	Coffin-Manson constant C
`alpha` (float)	Coffin-Manson constant a
`Cd` (float)	Cyclic strength reduction constant
`'-IsoHard'` (str)	Isotropic Hardening / Diminishing Yield Plateau
`a1` (float)	Hardening constant (default = 4.3)
`limit` (float)	Limit for the reduction of the yield plateau. % of original plateau length to remain (0.01 < limit < 1.0 ) Limit =1.0, then no reduction takes place (default =0.01)
`'-MPCurveParams'` (str)	Menegotto and Pinto Curve Parameters
`R1` (float)	(default = 0.333)
`R2` (float)	(default = 18)
`R3` (float)	(default = 4)