TY - GEN
T1 - HIGH-FIDELITY SIMULATIONS OF CONCRETE STRUCTURES WITH A MESH-SENSITIVITY MITIGATED CONSTITUTIVE MODEL
AU - Yuen, Terry Y.P.
AU - Hung, Chung Chan
AU - Zhang, Hexin
AU - Pham, Phu Anh Huy
AU - Wen, Tzu Han
AU - Deng, Yu
N1 - Funding Information:
The authors would like to express their gratitude for the funding support by the Ministry of Science and Technology (MOST), R.O.C. under Grand Numbers 110-2221-E-A49 -133 -, 109-2636-E-006-015, 109-2636-E-009 -015-., and Royal Academy of Engineering-Industrial Fellowship (IF\192023). We sincerely thank Prof. Min-Yuan Cheng and Dr. Marnie Giduquio from the Dept. of Civil and Construction Engineering, National Taiwan University of Science and Technology for providing the experimental data on high-strength squat RC walls.
Funding Information:
The authors would like to express their gratitude for the funding support by the Ministry of Science and Technology (MOST), R.O.C. under Grand Numbers 110-2221-E-A49-133-, 109-2636-E-006-015, 109-2636-E-009-015-., and Royal Academy of Engineering-Industrial Fellowship (IF\192023). We sincerely thank Prof. Min-Yuan Cheng and Dr. Marnie Giduquio from the Dept. of Civil and Construction Engineering, National Taiwan University of Science and Technology for providing the experimental data on high-strength squat RC walls.
Publisher Copyright:
© Fédération Internationale du Béton – International Federation for Structural Concrete.
PY - 2022
Y1 - 2022
N2 - High-fidelity, three-dimensional, and nonlinear finite element analysis (NLFEA) would be inevitable to reliably analyse and design unconventional and irregular concrete structures under extreme loading. The core of NLFEM is the constitutive modelling of materials. The existing constitutive models for concrete can be broadly classified as plasticity or phenomenological models. Nevertheless, many of those models could not resolve some critical concrete modelling issues that involve crack-induced anisotropy, change of stress transfer mechanisms under non-proportional loading, shear-slip and re-contact behaviour, mesh-size sensitivity, and balance between computational efficiency and modelling the detailed responses. To this end, this paper presents a robust and experimentally validated constitutive model that was developed recently. The key features of the model include (1) formulation with the total-strains and loading-history dependent internal variables, (2) cyclic normal and tangential stress-strain responses prescribed on crack planes, (3) fixed 3D crack plane coordinate that is uniquely determined by a novel crack plane searching algorithm, (4) multi-axial strain interaction modelled by the equivalent uniaxial-strains transformation method, (5) shear-slip and re-contact of the crack planes modelled by the modified shear retention model, and (6) mesh-size sensitivity mitigation through the model parameter regularisation. The proposed model was implemented into ABAQUS through the user-subroutine and successfully applied to simulate reserved-cyclic loading tests on a shear critical column and a high-strength squat RC wall. The proposed model can capture the damage evolutions and loss of axial and complete load-deflection hysteresis response of the tested column and wall. Hence, the proposed model could be a competent candidate for the high-fidelity nonlinear analysis of next generations of concrete structures that feature unconventional shapes.
AB - High-fidelity, three-dimensional, and nonlinear finite element analysis (NLFEA) would be inevitable to reliably analyse and design unconventional and irregular concrete structures under extreme loading. The core of NLFEM is the constitutive modelling of materials. The existing constitutive models for concrete can be broadly classified as plasticity or phenomenological models. Nevertheless, many of those models could not resolve some critical concrete modelling issues that involve crack-induced anisotropy, change of stress transfer mechanisms under non-proportional loading, shear-slip and re-contact behaviour, mesh-size sensitivity, and balance between computational efficiency and modelling the detailed responses. To this end, this paper presents a robust and experimentally validated constitutive model that was developed recently. The key features of the model include (1) formulation with the total-strains and loading-history dependent internal variables, (2) cyclic normal and tangential stress-strain responses prescribed on crack planes, (3) fixed 3D crack plane coordinate that is uniquely determined by a novel crack plane searching algorithm, (4) multi-axial strain interaction modelled by the equivalent uniaxial-strains transformation method, (5) shear-slip and re-contact of the crack planes modelled by the modified shear retention model, and (6) mesh-size sensitivity mitigation through the model parameter regularisation. The proposed model was implemented into ABAQUS through the user-subroutine and successfully applied to simulate reserved-cyclic loading tests on a shear critical column and a high-strength squat RC wall. The proposed model can capture the damage evolutions and loss of axial and complete load-deflection hysteresis response of the tested column and wall. Hence, the proposed model could be a competent candidate for the high-fidelity nonlinear analysis of next generations of concrete structures that feature unconventional shapes.
UR - https://www.scopus.com/pages/publications/85143912161
UR - https://www.scopus.com/pages/publications/85143912161#tab=citedBy
M3 - Conference contribution
AN - SCOPUS:85143912161
SN - 9782940643158
T3 - fib Symposium
SP - 1750
EP - 1759
BT - Proceedings for the 6th fib International Congress, 2022- Concrete Innovation for Sustainability
A2 - Stokkeland, Stine
A2 - Braarud, Henny Cathrine
PB - fib. The International Federation for Structural Concrete
T2 - 6th fib International Congress on Concrete Innovation for Sustainability, 2022
Y2 - 12 June 2022 through 16 June 2022
ER -