Finite Element modelling of tunnelling-induced displacements on framed structures

Boldini, Daniela; Losacco, Nunzio; Bertolin, Sara; Amorosi, A.

doi:10.1016/j.tust.2018.06.019

Cited by 57 publications

(21 citation statements)

References 23 publications

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“…Although the structural characteristics of framed buildings need to be considered in tunnel-soil-structure modelling (Boldini et al, 2018;Elkayam & Klar, 2019;Fu et al, 2018;Comodromos et al, 2014) and risk assessments (Boone, 1996), equivalent beam or plate models with minimal shear flexibility are still often adopted (Franzius et al, 2006;Haji et al, 2018). However, Xu et al (2020) recently provided experimental evidence that framed buildings on raft foundations primarily exhibit shear distortions when subjected to tunnelling-induced displacements and suggested, by contrasting framed building results with equivalent plate test results from Farrell et al (2014), that the use of equivalent beams/plates with minimal shear flexibility may not be adequate for framed buildings.…”

Section: Introductionmentioning

confidence: 99%

Tunnel–framed building interaction: comparison between raft and separate footing foundations

Franza

Marshall

et al. 2021

Géotechnique

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This paper investigates the influence of the foundation configuration (raft or separate footings) on tunnel-soil-framed building interaction using geotechnical centrifuge testing. Tunnelling-induced soil movements and deformation fields, framed building displacements, and structure shear distortions (with associated modification factors) are illustrated. Framed building stiffness and footing bearing capacity are also evaluated experimentally. Results show that the foundation configuration plays an important role in determining the ground response to tunnelling, affecting soil displacement fields as well as the distribution of soil shear and volumetric strains. In particular, foundation settlements and differential horizontal displacements are larger for separate footings compared to raft foundations. The effects of building width, weight, and eccentricity (with respect to the tunnel) on foundation settlements and structural distortions is quantified for separate footings and contrasted against results for raft foundations. The modification factor of the maximum building shear distortion is linked to the relative soil-building shear stiffness; interestingly, for buildings with similar values of relative stiffness, the level of shear distortion within framed buildings is lower for separate footings than rafts.

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Section: Introductionmentioning

confidence: 99%

Tunnel–framed building interaction: comparison between raft and separate footing foundations

Franza

Marshall

et al. 2021

Géotechnique

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“…The response of buildings to tunneling has been investigated extensively. While several studies have indicated the importance of considering realistic (framed) building characteristics (Boone, 1996;Boldini et al, 2018;Fu et al, 2018;Son, 2015), equivalent beam or plate models are still generally adopted (Franzius et al, 2006;Pickhaver et al, 2010;Maleki et al, 2011;Namazi and Mohamad, 2013;Farrell et al, 2014;Bilotta et al, 2017;Franza and Marshall, 2018). This simplification involves uncertainties that have not yet been sufficiently investigated for framed buildings.…”

Section: Introductionmentioning

confidence: 99%

“…Also, Franza et al (2020) highlighted that bending and shear deformation modes of equivalent solids have not always been well distinguished because of the focus on the structure settlement profile. Finally, the local deformations of infill walls in frames is potentially not well described by equivalent beams or plates (Goh and Mair, 2014;Boldini et al, 2018).…”

Section: Introductionmentioning

confidence: 99%

“…Son (2015) considered the distortion and cracking of two different framed structures subjected to tunneling in sandy ground, in which tunneling-related parameters and ground condition were varied. Boldini et al (2018) conducted a parametric study of the response of reinforced concrete framed structures to tunneling using the finite element method and found that framed structures always display hogging zones at the ends of the foundation due to the non-uniform contract pressure at the soil-foundation interface.…”

Section: Introductionmentioning

confidence: 99%

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Response of Framed Buildings on Raft Foundations to Tunneling

Franza

Marshall

2020

J. Geotech. Geoenviron. Eng.

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This paper investigates the response of framed buildings on raft foundations to tunnel construction using geotechnical centrifuge testing. Five framed building models were considered and the influence of building configuration, weight, eccentricity, and soil density were evaluated. Soil and foundation displacements, frame deformed shape, maximum structure deformation parameters (deflection ratios and angular distortions), and associated modification factors are illustrated. Results indicate that, unlike equivalent isotropic plates, framed buildings primarily exhibit shear behavior and a semi-flexible response. Building deformed shapes indicate that angular/shear distortions (considering bay slope and local tilt) are more appropriate for quantifying framed building distortions than deflection ratios. A relative stiffness parameter is suggested to relate maximum angular distortions to greenfield settlement slope. Moreover, the efficiency of available relative stiffness parameters for the deflection ratio modification factors is confirmed. Limitations of the equivalent plate approach and practical implications of the results for framed buildings are discussed.

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“…Most of the research on structural deformation assessment is carried out on greenfield ground [11], but the evaluation results are conservative [12]. In order to more accurately evaluate the ground movements, the impacts of structural weight [13,14] and stiffness [15][16][17][18] need to be considered.…”

Section: Introductionmentioning

confidence: 99%

Seismic Vulnerability Analysis of Structure Subjected to Uneven Foundation Settlement

Bao

Chen

et al. 2019

Applied Sciences

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Uneven foundation settlement is one of the common engineering problems in a collapsible loess area. In order to study the influence of uneven foundation settlement on the seismic performance of a structure, the incremental dynamic analysis (IDA) method is used to analyze the seismic vulnerability of the steel structure frame. The differences in the seismic response of the structure in relation to uneven foundation settlement are analyzed. The influences of uneven foundation settlement quantities and various areas of uneven settlement on the seismic response of the structure are discussed. On this basis, the relationship between ground motion intensity and structural failure probability is studied, by changing the magnitude of seismic acceleration peaks. Compared with the unsettled structure, the internal force redistribution of the structure caused by uneven foundation settlement is one of the causes of earthquake damage for some components. The uneven foundation settlement located at the corner of the plane of the structure is likely to cause more serious earthquake damage to the structure. Uneven settlement will cause an increase in storey drift. With the increase in settlement, the seismic damage of the superstructure will be aggravated.

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Finite Element modelling of tunnelling-induced displacements on framed structures

Cited by 57 publications

References 23 publications

Tunnel–framed building interaction: comparison between raft and separate footing foundations

Tunnel–framed building interaction: comparison between raft and separate footing foundations

Response of Framed Buildings on Raft Foundations to Tunneling

Seismic Vulnerability Analysis of Structure Subjected to Uneven Foundation Settlement

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