Cracked Equivalent Beam Models for Assessing Tunneling-Induced Damage in Masonry Buildings
Publication: Journal of Geotechnical and Geoenvironmental Engineering
Volume 147, Issue 2
Abstract
This paper proposes simple numerical models that simulate the influence of tunneling-induced ground movements on masonry buildings founded on shallow strip footings. The focus is on developing an improved understanding of the impact of structural discontinuities due to pre-existing cracks and joints between adjacent buildings. The soil–structure system is idealized with equivalent Timoshenko beams connected to a homogenous elastic half-space with rigid links. The flexibility of the equivalent beam at the location of the crack or building interface is determined using linear-elastic fracture mechanics. The proposed models are first applied to a generic numerical example. Then, they are used to interpret the detailed displacement and strain measurements gathered from a masonry church during nearby tunneling. The results show that pre-existing cracks can have variable influence on the soil–structure interaction depending on their extent and position relative to the building and settlement trough. For the investigated case study, the proposed models illustrate how pre-existing large cracks in the hogging zone localized deformations and how the interaction between adjacent buildings drastically altered response mechanisms.
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Data Availability Statement
Some or all data, models, or code generated or used during the study are available in a repository or online in accordance with funder data retention policies (see https://doi.org/10.5287/bodleian:KzMpOnx6d).
Acknowledgments
The authors would like to acknowledge the support of Geocisa UK and Transport for London in collecting the data used for the case study. Part of this work is funded by the EPSRC (Ref. EP/N021614/1) and Innovate UK (Ref. 920035) through the Cambridge Centre for Smart Infrastructure and Construction Grant. The first author is grateful to the Royal Commission of the Great Exhibition of 1851 for the Research Fellowship funding. The authors would also like to acknowledge the comments from the anonymous reviewers, which helped improve the clarity of the paper.
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© 2020 American Society of Civil Engineers.
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Received: Jul 31, 2019
Accepted: Aug 28, 2020
Published online: Dec 4, 2020
Published in print: Feb 1, 2021
Discussion open until: May 4, 2021
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