I want to model CDP model that will incur the effect of fire in the degradation of concrete properties with continuous changing temperature. I have read few literatures but unable to finf a suitable one that will be pf some help to me. Kindly suggest any particular one knows of. It would be really very helpful.
Abhinav Anand here are some literatures that you can refer to for simulating the effect of fire on concrete properties in ABAQUS:
- Simulation of RC Beams during Fire Events Using a Nonlinear Numerical Fully Coupled Thermal-Stress Analysis, link: https://www.mdpi.com/2571-6255/6/2/57
- Evaluation of Fire Effects on Reinforced Concrete Columns Using Finite Element Method, link: https://thescipub.com/abstract/ajeassp.2019.227.235
- Analysis of Fire Resistance of Prestressed Concrete T-Beam Based on ABAQUS Numerical Simulation, link: https://www.mdpi.com/2076-3417/13/8/4683
Abaqus keyword from a research study in similar domain i performed are included here;
** MATERIALS
**
** This material definition now counts thermal effects, Model without LITS.
** Material definition is not ye finalized.
*Material, name=Concrete_Thermal
*Conductivity
1.951, 20.
1.88, 50.
1.766,100.
1.553,200.
1.361,300.
1.191,400.
*Density
2.323e-09,
*Elastic
25284., 0.2
*Expansion
1e-06,
*Specific Heat
913.361, 20.
933.507, 50.
967.361,100.
1036.,200.
1106.,300.
1178.,400.
*Concrete Damaged Plasticity
48., 0.1, 1.16, 0.67, 0.04
*Concrete Compression Hardening
3., 0., , 20.
15.4945, 0.00042, , 20.
30., 0.00104, , 20.
41.3736, 0.00153, , 20.
48.7912, 0.00208, , 20.
51.2637, 0.00249, , 20.
0., 0.02003, , 20.
3., 0., , 100.
15.4945, 0.00049, , 100.
30.1648, 0.00098, , 100.
41.2088, 0.00153, , 100.
48.7912, 0.00195, , 100.
51.0989, 0.00249, , 100.
0., 0.02261, , 100.
3., 0., , 200.
4.17582, 0.00055, , 200.
8.02198, 0.00111, , 200.
9.56044, 0.00187, , 200.
6.15385, 0.00235, , 200.
8.13187, 0.00303, , 200.
0.164835, 0.02504, , 200.
3., 0., , 300.
13.1868, 0.00082, , 300.
25.3846, 0.00158, , 300.
35.4396, 0.00234, , 300.
41.2088, 0.00322, , 300.
43.1868, 0.00397, , 300.
0., 0.02768, , 300.
3., 0., , 400.
1.7033, 0.00096, , 400.
2.08791, 0.00192, , 400.
1.15385, 0.00281, , 400.
7.08791, 0.00369, , 400.
8.73626, 0.00451, , 400.
0.164835, 0.03012, , 400.
*Concrete Tension Stiffening
2.6, 0., ,25.
** Editable.
Beside, you need to define, temperature dependent data for your file, using, conductivity, density, elasticity, expansion, specific heat & concrete damage plasticity. First perform thermal analyses and then mechanical analyses for the same file considering the thermal profile as an input for the mechanical analyses. I have attached a heat profile as well, which i used in one of a research study.
I understand that you want to model the concrete damage plasticity (CDP) model that will account for the effect of fire on the degradation of concrete properties with varying temperature. This is a challenging task that requires a good understanding of the material behavior and the numerical methods involved. I have searched the web for some relevant literature that might be helpful for you. Here are some of the papers that I found:
- CALIBRATION OF CONCRETE DAMAGE PLASTICITY MODEL PARAMETERS FOR HIGH TEMPERATURE MODELLING OF REINFORCED CONCRETE FLAT SLABS IN FIRE: This paper examines the parameters of the CDP model at high temperatures in Abaqus, for a three-dimensional finite element model of a reinforced concrete flat slab exposed to fire. The results suggest a value of the viscosity of 0.0001t (in terms of total ‘Time period’) and dilation angle of 35⁰ to give reasonable deflection response predictions1.
- Calibration of a concrete damage plasticity model used to simulate the material components of unreinforced masonry reinforced concrete infill frames: This paper discusses the identification and characterization of material parameters of a CDP model that is used to describe the mechanical responses of mortar, bricks, and concrete, defined here as the three material components of an unreinforced masonry infill wall system. The methodology to explore the use of the proposed constitutive model includes a parametric analysis, followed by the deterministic calibration of the model parameters based on a standard optimization approach2.
- Effect of Viscosity Parameter on Numerical Simulation of Fire Damaged Concrete Structures: This paper investigates the influence of the viscosity parameter on the numerical simulation of fire damaged concrete structures using Abaqus. The paper shows that the viscosity parameter has a significant effect on the predicted crack patterns and load-displacement curves, and recommends a value of 0.0001 for this parameter
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