Check abaqus verification guide - 2.2.25 Concrete damaged plasticity

Link -> http://129.97.46.200:2080/v6.13/books/ver/default.htm

Hi Navid, 

It seems better use damage index for calculation of parameters such as elastic modulus and moment of inertia. Thus, if the damage type existence in geometrical damage type had effect on (I) and if the damage type existence in mechanical damage type had effect on (E). 

The ratio of damage index defined based on E and I in two state: Intact and Damage.

A ratio between EI damage over EI intact concrete. 

Good Luck,

Milad

Hi Navid Arvin

The plasticity parameters for Abaqus Concrete Damage Plasticity model are commonly obtained from experimental results. Thus, if you consult some references with experimental results you can determine this parameters, for example, triaxial tests of cylinder with active confinement to determine the dilation angle of concrete. See the Abaqus manual to know how to the plasticity parameters are required. Other important point is the hardening/softening evolution law for tension and compression. Normally, you adopt a uniaxial constitutive law for tension and another for compression and input in Abaqus the plastic part of the curve (see the manual). Finally, the damage part of the model. For this you can adopt an isotropic damage evolution law (there are many options) which relates damage evolution and plastic strain. These are the parameters required for the Concrete Damage Plasticity model of Abaqus.

I hope this helps

Best regards

Pablo

Thank you from your help