- Title
- Modeling confined concrete behavior in finite element with a non-orthogonal elastoplastic model
- Creator
- Meng, Fanping; Lu, Dechun; Wang, Shanyong; Zhou, Xin; Du, Xiuli
- Relation
- ARC. DP210100437|DP230100126 https://purl.org/au-research/grants/arc/DP210100437 https://purl.org/au-research/grants/arc/DP230100126
- Relation
- Engineering Structures Vol. 312, Issue 1 August 2024, no. 118233
- Publisher Link
- http://dx.doi.org/10.1016/j.engstruct.2024.118233
- Publisher
- Elsevier
- Resource Type
- journal article
- Date
- 2024
- Description
- The accuracy of a constitutive model for confined concrete largely relies on its capability to capture concrete's dilatancy behavior. In this paper, a non-orthogonal flow rule (NFR) is used to reasonably characterize the concrete's volume change law in relation to the stress state without the necessity for a plastic potential function. Then, the non-orthogonal plastic model is implemented in the finite element (FE) software ABAQUS using the implicit stress update algorithm, which employs the line search method and the numerical consistent tangent stiffness matrix to ensure the robustness and computational efficiency of FE analysis. Finally, FE simulations are performed to evaluate the constitutive model's capabilities in actively and passively confined concrete. In the latter case, steel tubes restrict the concrete's lateral deformation. An analysis and discussion are conducted regarding the impact of dilatancy behavior on concrete-filled steel tube (CFST) columns. The consistency between experimental data and simulation results demonstrates that the FE modeling with a non-orthogonal constitutive model provides an effective tool to describe the behavior of confined concrete.
- Subject
- constitutive model; confined concrete; numerical implementation; finite elements
- Identifier
- http://hdl.handle.net/1959.13/1518689
- Identifier
- uon:57351
- Identifier
- ISSN:0141-0296
- Language
- eng
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