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Machine-learning for damage assessment of rubble stone masonry piers based on crack patterns
École Polytechnique Fédérale de Lausanne, Switzerland.
RISE Research Institutes of Sweden, Materials and Production, Applied Mechanics.ORCID iD: 0000-0002-9586-8667
EPFL, Switzerland; ETH Zurich, Switzerland.
École Polytechnique Fédérale de Lausanne, Switzerland.
2022 (English)In: Automation in Construction, ISSN 0926-5805, E-ISSN 1872-7891, Vol. 140, article id 104313Article in journal (Refereed) Published
Abstract [en]

Under seismic actions, stone masonry buildings are prone to damage. To assess the severity of damaged masonry buildings and their failure modes, engineers connect these problems to surface crack features, such as the crack width and the extent of cracking. We aim to further these assessments in this study, wherein we propose using simple machine learning models to predict: 1) three ratios encoding the degradation of stiffness, strength, and displacement capacity of damaged rubble stone masonry piers as a function of the observed crack features and the applied axial load and shear span ratio; and 2) the pre-peak vs. post-peak regime, based on the crack features. When predicting the stiffness, force, and drift ratios, the prediction error is significantly reduced when the axial load and shear span ratio are included in the feature vector. Furthermore, when predicting the pre-peak vs. post-peak regime, simple machine learning models such as the k-nearest neighbor and the logistic regression result in remarkable accuracy. The obtained results have significant implications on the automated post-earthquake assessment of masonry buildings using image data. It is shown based on documented laboratory test data, that, by selecting proper crack features and incorporating information about the kinematic and static boundary conditions, even simple machine learning models can predict accurately the damage level caused to a rubble masonry pier. The three crack features used in this study are the maximum crack width, length density, and complexity dimension. The pipeline developed in this paper is general enough and is applicable to other masonry typologies and elements upon new evaluation of crack features and image data.

Place, publisher, year, edition, pages
2022. Vol. 140, article id 104313
Keywords [en]
Damage assessment, Crack pattern, Masonry building, Machine learning, Post-earthquake assessment
National Category
Applied Mechanics
Identifiers
URN: urn:nbn:se:ri:diva-59360DOI: 10.1016/j.autcon.2022.104313OAI: oai:DiVA.org:ri-59360DiVA, id: diva2:1674569
Note

This project is supported by the Swiss National Science Foundation(grant 200021_175903/1 “Equivalent frame models for the in-plane andout-of-plane response of unreinforced masonry buildings”)

Available from: 2022-06-22 Created: 2022-06-22 Last updated: 2023-04-28Bibliographically approved

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Godio, Michele

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