Identification of multiple flaws in dams using inverse analysis based on hydro-mechanical XFEM and level sets

authored by: Long Nguyen-Tuan, Srivilliputtur Subbiah Nanthakumar, Tom Lahmer
Abstract: Model-based inverse problems emerge as an alternative means to reconstruct buried objects in structures. In this paper, we propose a method to detect multiple flaws in massive permeable structures. The extended finite element method (XFEM) is used as a tool to solve the coupled hydro-mechanical problem. Simultaneously, level set front propagation defined by Hamilton–Jacobi equations is adopted for solving the inverse problem of finding the material changes from measured data. A system of equations is proposed to derive the shape derivatives of the objective functions. The method is then applied to detect possible flaws in a masonry dam. The results obtained indicate that the method enables the efficient identification of hidden flaws in masonry dams.
Organisation(s): Institute of Continuum Mechanics
External Organisation(s): Bauhaus-Universität Weimar
Type: Article
Journal: Computers and geotechnics
Volume: 110
Pages: 211-221
No. of pages: 11
ISSN: 0266-352X
Publication date: 06.2019
Publication status: Published
Peer reviewed: Yes
ASJC Scopus subject areas: Geotechnical Engineering and Engineering Geology, Computer Science Applications
Electronic version(s): https://doi.org/10.1016/j.compgeo.2019.02.006 (Access: Closed)
: Details in the research portal "Research@Leibniz University"

BibTeX

@article{0dea234ca1674e7e8b5d1932cce20c07,
title = "Identification of multiple flaws in dams using inverse analysis based on hydro-mechanical XFEM and level sets",
abstract = "Model-based inverse problems emerge as an alternative means to reconstruct buried objects in structures. In this paper, we propose a method to detect multiple flaws in massive permeable structures. The extended finite element method (XFEM) is used as a tool to solve the coupled hydro-mechanical problem. Simultaneously, level set front propagation defined by Hamilton–Jacobi equations is adopted for solving the inverse problem of finding the material changes from measured data. A system of equations is proposed to derive the shape derivatives of the objective functions. The method is then applied to detect possible flaws in a masonry dam. The results obtained indicate that the method enables the efficient identification of hidden flaws in masonry dams.",
keywords = "Extended finite element, Flaws identification, Inverse problem, Level set, Masonry dam",
author = "Long Nguyen-Tuan and Nanthakumar, {Srivilliputtur Subbiah} and Tom Lahmer",
note = "Funding Information: The research was supported by the Deutsche Forschungsgemeinschaft (DFG) under grant LA 2869/4-1 (project number 264166740), which is gratefully acknowledged by the authors. The authors additionally thank Prof. Tom Schanz from Ruhr-University Bochum for his exceptional scientific efforts and intensive support of young researchers.",
year = "2019",
month = jun,
doi = "10.1016/j.compgeo.2019.02.006",
language = "English",
volume = "110",
pages = "211--221",
journal = "Computers and geotechnics",
issn = "0266-352X",
publisher = "Elsevier BV",
}