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Tunneling-Induced Deformation of Bare Frame Structures on Sand: Numerical Study of Building Deformations

Boldini, D.; Losacco, N.; Franza, A.; DeJong, M. J.; Xu, J.; Marshall, A. M.

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Authors

D. Boldini

N. Losacco

A. Franza

M. J. DeJong

J. Xu



Abstract

The paper compares the performance of two Finite Element Method approaches in reproducing the response of bare frame structures to tunneling in dry dense sand. A fully coupled approach, in which the tunnel, frame and soil are accounted for, is compared with a two-stage method incorporating simpler structural and soil models. The two approaches are validated against centrifuge test results of tunneling in sand beneath frames founded on either rafts or separate footings. Both approaches provide good estimates of displacements and distortions experienced by the frames provided that the soil-foundation interface and structural stiffness are correctly accounted for. The numerical models are also employed to extend the range of eccentric configurations investigated with centrifuge tests. The results demonstrate that shear deformations play an important role for all considered buildings, whereas only frames on separate footings are sensitive to horizontal ground movements. Finally, data are synthesized using modification factors and recently proposed relative stiffness terms.

Citation

Boldini, D., Losacco, N., Franza, A., DeJong, M. J., Xu, J., & Marshall, A. M. (2021). Tunneling-Induced Deformation of Bare Frame Structures on Sand: Numerical Study of Building Deformations. Journal of Geotechnical and Geoenvironmental Engineering, 147(11), Article 0002627. https://doi.org/10.1061/%28asce%29gt.1943-5606.0002627

Journal Article Type Article
Acceptance Date Jun 3, 2021
Online Publication Date Aug 23, 2021
Publication Date 2021-11
Deposit Date Jun 9, 2021
Publicly Available Date Aug 23, 2021
Journal Journal of Geotechnical and Geoenvironmental Engineering
Print ISSN 1090-0241
Electronic ISSN 1943-5606
Publisher American Society of Civil Engineers
Peer Reviewed Peer Reviewed
Volume 147
Issue 11
Article Number 0002627
DOI https://doi.org/10.1061/%28asce%29gt.1943-5606.0002627
Keywords Geotechnical Engineering and Engineering Geology; General Environmental Science
Public URL https://nottingham-repository.worktribe.com/output/5652007
Publisher URL https://ascelibrary.org/doi/10.1061/%28ASCE%29GT.1943-5606.0002627
Related Public URLs http://cedb.asce.org
Additional Information Received: 2020-06-26; Accepted: 2021-06-03; Published: 2021-08-23

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