ECC01

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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