Reinforcing Steel Material: Difference between revisions

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|  '''$eult''' || Strain at peak stress
|  '''$eult''' || Strain at peak stress
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|  '''-GABuck''' || Buckling Model Based on Gomes and Appleton (1997)
 
{|
style="width:150px ;" | '''-GABuck''' || Buckling Model Based on Gomes and Appleton (1997)
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|  '''$lsr''' || Slenderness Ratio (see Figure 2)
|  '''$lsr''' || Slenderness Ratio (see Figure 2)

Revision as of 06:01, 7 December 2009

Contact Authors: 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)
-DMBuck Buckling model based on Dhakal and Maekawa (2002)
$lsr Slenderness Ratio (see Figure 2)
$alpha Adjustment Constant usually between 0.75 and 1.0
Default: alpha=1.0, this parameter is optional.