Reinforcing Steel Material

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Jon Mohle M.S., P.E. Sashi Kunnath: http://cee.engr.ucdavis.edu/faculty/kunnath/kunnath.htm } 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. uniaxialMaterial ReinforcingSteel $matTag $fy $fu $Es $Esh $esh $eult < -GABuck $lsr $beta $r $gama > < -DMBuck $lsr < $alpha >> < -CMFatigue $Cf $alpha $Cd > < -IsoHard <$a1 <$limit> > > $matTag integer tag identifying material $matTag unique material object integer tag $fy Yield stress in tension (see Figure 1) $fu Ultimate stress in tension $Es Initial elastic tangent $Esh Tangent at initial strain hardening $esh Strain corresponding to initial strain hardening $eult Strain at peak stress -GABuck Buckling Model Based on Gomes and Appleton (1997) $lsr Slenderness Ratio (see Figure 2) $beta Amplification factor for the buckled stress strain curve. (see Figure 3) $r 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 Buckling constant (see Figures 3 and 4)