Details
| Original language | English |
|---|---|
| Article number | 119970 |
| Number of pages | 19 |
| Journal | Engineering structures |
| Volume | 332 |
| Early online date | 7 Mar 2025 |
| Publication status | Published - 1 Jun 2025 |
Abstract
Objective simulation of reinforced concrete (RC) structure, which is insensitive to the mesh size and orientation, is still a challenging task in engineering. In response, this study combines the extended gradient damage (EGD) model with energy decomposition, focusing on predicting the failure behavior of RC with openings. The EGD model adopts a strategy of decoupling the cohesive laws and the damage evolution, thus solving the damage unloading problem inherent in the phase-field models and the gradient-enhanced damage models. Additionally, the EGD model allows for the flexible assignment of tensile and shear mechanical properties to materials. This flexibility eliminates the constraint in the fracture phase-field model that requires the tensile fracture energy to equal the shear fracture energy, thereby enabling more accurate predictions of failure in engineering structures. Since the EGD model diffuses the crack into a damage band that spans multiple elements, the prediction results are independent of the mesh size and shape. Complex fracture patterns can also be reproduced through energy decomposition. In order to efficiently model and predict the failure of RC structures, an explicitly parallel numerical algorithm is developed in this study and integrated into the commercial software ABAQUS. Finally, through a series of numerical examples, it is demonstrated that the EGD model can effectively predict the crack path and global response of RC structures.
Keywords
- Cohesive zone theory, Concrete crack, Extended gradient damage model, Non-local damage theory, Structure with opening
ASJC Scopus subject areas
- Engineering(all)
- Civil and Structural Engineering
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In: Engineering structures, Vol. 332, 119970, 01.06.2025.
Research output: Contribution to journal › Article › Research › peer review
}
TY - JOUR
T1 - Advancing the non-local damage approach for reinforced concrete structures
T2 - The Extended Gradient Damage Model
AU - Xue, Liang
AU - Feng, Ye
AU - Hai, Lu
AU - Ren, Xiaodan
AU - Li, Jie
N1 - Publisher Copyright: © 2025 Elsevier Ltd
PY - 2025/6/1
Y1 - 2025/6/1
N2 - Objective simulation of reinforced concrete (RC) structure, which is insensitive to the mesh size and orientation, is still a challenging task in engineering. In response, this study combines the extended gradient damage (EGD) model with energy decomposition, focusing on predicting the failure behavior of RC with openings. The EGD model adopts a strategy of decoupling the cohesive laws and the damage evolution, thus solving the damage unloading problem inherent in the phase-field models and the gradient-enhanced damage models. Additionally, the EGD model allows for the flexible assignment of tensile and shear mechanical properties to materials. This flexibility eliminates the constraint in the fracture phase-field model that requires the tensile fracture energy to equal the shear fracture energy, thereby enabling more accurate predictions of failure in engineering structures. Since the EGD model diffuses the crack into a damage band that spans multiple elements, the prediction results are independent of the mesh size and shape. Complex fracture patterns can also be reproduced through energy decomposition. In order to efficiently model and predict the failure of RC structures, an explicitly parallel numerical algorithm is developed in this study and integrated into the commercial software ABAQUS. Finally, through a series of numerical examples, it is demonstrated that the EGD model can effectively predict the crack path and global response of RC structures.
AB - Objective simulation of reinforced concrete (RC) structure, which is insensitive to the mesh size and orientation, is still a challenging task in engineering. In response, this study combines the extended gradient damage (EGD) model with energy decomposition, focusing on predicting the failure behavior of RC with openings. The EGD model adopts a strategy of decoupling the cohesive laws and the damage evolution, thus solving the damage unloading problem inherent in the phase-field models and the gradient-enhanced damage models. Additionally, the EGD model allows for the flexible assignment of tensile and shear mechanical properties to materials. This flexibility eliminates the constraint in the fracture phase-field model that requires the tensile fracture energy to equal the shear fracture energy, thereby enabling more accurate predictions of failure in engineering structures. Since the EGD model diffuses the crack into a damage band that spans multiple elements, the prediction results are independent of the mesh size and shape. Complex fracture patterns can also be reproduced through energy decomposition. In order to efficiently model and predict the failure of RC structures, an explicitly parallel numerical algorithm is developed in this study and integrated into the commercial software ABAQUS. Finally, through a series of numerical examples, it is demonstrated that the EGD model can effectively predict the crack path and global response of RC structures.
KW - Cohesive zone theory
KW - Concrete crack
KW - Extended gradient damage model
KW - Non-local damage theory
KW - Structure with opening
UR - http://www.scopus.com/inward/record.url?scp=86000185128&partnerID=8YFLogxK
U2 - 10.1016/j.engstruct.2025.119970
DO - 10.1016/j.engstruct.2025.119970
M3 - Article
AN - SCOPUS:86000185128
VL - 332
JO - Engineering structures
JF - Engineering structures
SN - 0141-0296
M1 - 119970
ER -