214376901 01-15-14 concrete damaged plasticity model
DESCRIPTION
Concrete Damaged Plasticity ModelTRANSCRIPT
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CONCRETE DAMAGED
PLASTICITY MODELGEOSYSTEMS LABORATORY
DEPARTMENT OF CIVIL ENGINEERINGPUSAN NATIONAL UNIVERSITY
BUSAN, SOUTH KOREA
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OUTLINE:
I. INTRODUCTIONII. ANALYSISIII. FINITE ELEMENT MODEL AND PARAMETERSIV. EXPECTED RESULTS/OUTPUT
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CONCRETE DAMAGED PLASTICITY MODEL
ABAQUS is a general purpose simulation tool based on the finite element method that can be used for a variety of applications ranging from the modelling of civil engineering structures to acoustics.The concrete damaged plasticity model in ABAQUS: provides a general capability for modelling concrete and other
quasi-brittle materials in all types of structures; uses concepts of isotropic damaged elasticity in combination
with isotropic tensile and compressive plasticity to represent the inelastic behaviour of concrete;
is designed for applications in which concrete is subjected to monotonic, cyclic, and/or dynamic loading under low confining pressures; and
assumes that the two main failure mechanisms are tensile cracking and compressive crushing
I. INTRODUCTION
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CONCRETE DAMAGED PLASTICITY MODEL
I. INTRODUCTION
Fig.1 – Tension Stiffening Model Fig.2 – Compressive Stress-Strain Relationship
Response of concrete to uniaxial loading in tension and compression
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CONCRETE DAMAGED PLASTICITY MODEL
II. ANALYSISThere are two options by which the material
properties can be incorporated for the analysis in ABAQUS: a) through CAE and b) through input file.
Fig.3 – Material Editor (used to define material properties)5
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CONCRETE DAMAGED PLASTICITY MODEL
III. FINITE ELEMENT MODEL AND PARAMETERS
Fig.4 – Finite element model (a) compression test, and (b) tension test
(a) (b) 6
C3D8R CAX4R
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CONCRETE DAMAGED PLASTICITY MODEL
III. FINITE ELEMENT MODEL AND PARAMETERS
Table 1 – Model Parameters for CDP Model
Compression Yield
Inelastic Strain Tensile Yield Fracture En-
ergy
1100 kPa 0 380 kPa 9 N/m
1650 kPa 0.0015
1650 kPa 0.0032
1400 kPa 0.0053
ELASTIC OPTION
Young’s Modulus, E (2400 Mpa)Poisson’s Ratio, v (0.167)
Source: Saw A, Leung C, and Tan S, “Evaluation of Constitutive Model in Simulating the Behavior of Cement-Treated Soil”, Third International Conference on Geotechnique, Construction Materials
and Environment, Nagoya, Japan, 2013.
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CONCRETE DAMAGED PLASTICITY MODEL
IV. EXPECTED RESULTS/OUTPUT
Fig.5 – Contour plots of stress component S22 (a) undeformed shape, and (b) deformed shape (Compression test)
(a) (b) 8
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CONCRETE DAMAGED PLASTICITY MODEL
IV. EXPECTED RESULTS/OUTPUT
Fig.6 – Contour plots of stress component S22 (both shapes) and field output requests (Compression test)
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CONCRETE DAMAGED PLASTICITY MODEL
IV. EXPECTED RESULTS/OUTPUT
Fig.7 – Contour plots of von Mises (a) undeformed shape, and (b) deformed shape (Tension test)
(a) (b) 10
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CONCRETE DAMAGED PLASTICITY MODEL
IV. EXPECTED RESULTS/OUTPUT
Fig.8 – Contour plots of von Mises (both shapes) and field output requests (Compression test)
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CONCRETE DAMAGED PLASTICITY MODEL
IV. EXPECTED RESULTS/OUTPUT
Fig.9 – Stress-strain curves under (a) compression load, and (b) tension load
(a) (b)
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THANK YOU!
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