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 |
|
peak tensile stress |
|
strain at peak tensile stress |
|
ultimate tensile strain |
sigc0
|
compressive strength (see NOTES) |
epsc0
|
strain at compressive strength (see NOTES) |
|
ultimate compressive strain (see NOTES) |
|
exponent of the unloading curve in tensile strain hardening region |
|
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.



REFERENCES:
- 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