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Appl. Sci. 2018, 8(7), 1067; https://doi.org/10.3390/app8071067

A Nonlinear Crack Model for Concrete Structure Based on an Extended Scaled Boundary Finite Element Method

1
State Key Laboratory of Coastal and Offshore Engineering, Institute of Earthquake Engineering, Dalian University of Technology, Dalian 116024, China
2
Department of Civil, Architectural and Environmental Engineering, Missouri University of Science and Technology, Rolla, MO 65409, USA
*
Author to whom correspondence should be addressed.
Received: 27 April 2018 / Revised: 26 June 2018 / Accepted: 26 June 2018 / Published: 29 June 2018
(This article belongs to the Special Issue Computational Methods for Fracture)
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Abstract

Fracture mechanics is one of the most important approaches to structural safety analysis. Modeling the fracture process zone (FPZ) is critical to understand the nonlinear cracking behavior of heterogeneous quasi-brittle materials such as concrete. In this work, a nonlinear extended scaled boundary finite element method (X-SBFEM) was developed incorporating the cohesive fracture behavior of concrete. This newly developed model consists of an iterative procedure to accurately model the traction distribution within the FPZ accounting for the cohesive interactions between crack surfaces. Numerical validations were conducted on both of the concrete beam and dam structures with various loading conditions. The results show that the proposed nonlinear X-SBFEM is capable of modeling the nonlinear fracture propagation process considering the effect of cohesive interactions, thereby yielding higher precisions than the linear X-SBFEM approach. View Full-Text
Keywords: elastoplastic behavior; extended scaled boundary finite element method (X-SBFEM); stress intensity factors; fracture process zone (FPZ) elastoplastic behavior; extended scaled boundary finite element method (X-SBFEM); stress intensity factors; fracture process zone (FPZ)
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This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited (CC BY 4.0).
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Li, J.-B.; Gao, X.; Fu, X.-A.; Wu, C.; Lin, G. A Nonlinear Crack Model for Concrete Structure Based on an Extended Scaled Boundary Finite Element Method. Appl. Sci. 2018, 8, 1067.

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