Engineered Cementitious Composites Material - OpenSeesWiki

Engineered Cementitious Composites Material

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This command is used to construct a uniaxial Engineered Cementitious Composites (ECC)material object based on the ECC material model of Han, et al. (see references). Reloading in tension and compression is linear.

uniaxialMaterial ECC01 $matTag $sigt0 $epst0 $sigt1 $epst1 $epst2 $sigc0 $epsc0 $epsc1 $alphaT1 $alphaT2 $alphaC $alphaCU $betaT $betaC



$matTag integer tag identifying material
$sigt0 tensile cracking stress
$epst0 strain at tensile cracking stress
$sigt1 peak tensile stress
$epst1 strain at peak tensile stress
$sigt2 ultimate tensile strain
$sigc0 compressive strength (see NOTES)
$epsc0 strain at compressive strength (see NOTES)
$epsc1 ultimate compressive strain (see NOTES)
$alphaT1 exponent of the unloading curve in tensile strain hardening region
$alphaT2 exponent of the unloading curve in tensile softening region
$alphaC exponent of the unloading curve in the compressive softening
$alphaCU exponent of the compressive softening curve (use 1 for linear softening)
$betaT parameter to determine permanent strain in tension
$betaC parameter to determine permanent strain in compression

NOTES

Compressive ECC parameters should be input as negative values.

ECC01.gif


EccTensile.gif


EccCompression.gif



REFERENCES:

  1. Han TS, Feenstra PH, Billington SL, "Simulation of Highly Ductile Fiber-Reinforced Cement-Based Composite Components Under Cyclic Loading," ACI Structural Journal, V. 100, No. 6, pp. 749-757.




Code Developed by: Won Lee, Stanford and Sara Billington, Stanford

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