I've tried using the Concrete Damaged Plasticity parameters but the model just would not work. I'm trying to model a beam-column joint using ECC as the joint material (region intersection between beam and column) under reversed cyclic loading. But the non-linearity of the compression, tensile stress-strain curves of the developed concrete took processing time near 24 hours with an odb file close to 13GB, which is unworkable if trying to extract XY data. To make things worse, that was just an incomplete 1 cycle of a 24 full cycle loading.
Below is a picture of the simple model. The base of the column is pin supported and a displacement controlled load is imposed on the face of the beam at only z-direction (towards the beam) no rotation and displacement at x,y.
Is there an alternative way to model the ECC in abaqus? Or are there way to improve my model? Attached is the picture. Thank you in advance.
CDP simulation is suitable for ECC. As you described, you have CDP data inputting error, additionally meshing problems.
First! I recommend you to check your input commands as follow...
*CONCRETE DAMAGED PLASTICITY
1., , 1.16, 0.66666, 0.001
*CONCRETE TENSION STIFFENING,
TYPE=GFI 2., 0.0003
*CONCRETE TENSION DAMAGE, TYPE=STRAIN,
COMPRESSION RECOVERY=0.1 0.0000, 0.0
*CONCRETE COMPRESSION HARDENING
30., 0. 40., 0.001 20., 0.003 5., 0.004 0.04, 0.0042
*CONCRETE COMPRESSION DAMAGE,
TENSION RECOVERY=0.0 0.0000E+00, 0.000E+00
Within those properties you can change according to yours.
Then you can make less dense mesh than it exits as present which will cover less amount of HDD space and also analysis duration.
Dear Sheikh Mohd Iqbal S. Zainal Abidin ,
- Try as much as possible to use as few points as possible to represent the concrete curve in the tensile or use the GFI method.
- A large odb size may be the result of a request to extract a point on the curve at each increment. So from field output request ==> choose every x units of time.
Kind Regards
Waleed
Dear Waleed E. El-Demerdash
What is the GFI method? Can you explain a bit more. Thanks
Dear Sheikh Mohd Iqbal S. Zainal Abidin
Please see the attached figure.
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