Centrifuge Modeling of Seismically Induced Uplift for the BART Transbay Tube

Chou, Jui-Ching; Kutter, Bruce L.; Travasarou, Thaleia; Chacko, Jacob

doi:10.1061/(asce)gt.1943-5606.0000489

Cited by 86 publications

(41 citation statements)

References 3 publications

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“…Four main mechanisms are known to be effective on uplifting of underground lifeline facilities including ratcheting, flow of liquefied soil as a viscous fluid, the pore water migration and to heave the base of trench [4]. The difference of excess pore pressure distribution underneath the duct and its lateral deformation are related to two mechanisms mentioned above.…”

Section: Underground Rc Ductmentioning

confidence: 98%

Seismic interaction of underground RC ducts and neighboring bridge piers in liquefiable soil foundation

2015

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A coupled system of an underground reinforced concrete (RC) duct and a neighboring bridge pier supported by group piles is numerically investigated in sandy soil at both drained and undrained liquefiable states under seismic ground excitations. Parametric studies are conducted to evaluate influencing factors on seismic performances of these neighboring interactive structural systems. The numerical simulations are performed with the finite element code COM3 (COncrete Model for 3D) (Maekawa, Pimanmas and Okamura in Nonlinear mechanics of reinforced concrete, 2003), which is capable of simulation of inelastic performance of RC structure and high nonlinearity of soil medium, especially on the liquefiable loose sand. It is mechanically pointed out that liquefaction-induced uplift of underground ducts is substantially influenced by the presence of on-ground bridges. Alternatively, inertial forces induced to the onground bridge pier are also noticeably affected by the presence of the neighboring underground RC duct. It is pointed in practice of design that these nonlinear interacting responses between these neighboring infrastructures are greatly magnified on liquefiable soil foundations.

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Section: Underground Rc Ductmentioning

confidence: 98%

Seismic interaction of underground RC ducts and neighboring bridge piers in liquefiable soil foundation

2015

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“…It can been seen that uplifting of the structure was evident in Test 3 where the structure was shallowly buried while the structure settled in Test 2 where the structure was deep buried. To simulate the common situation [24,25], the apparent unit weight of the metro station model had been designed to be less than the unit weight of the saturated sand. For convenience, it is assumed that the structure tends to uplift and certain volume of overlying soil above the structure tends to slid along some surfaces.…”

Section: Vertical Displacementsmentioning

confidence: 99%

Micro- and macro-observations of liquefaction of saturated sand around buried structures in centrifuge shaking table tests

Zhou

Jiang

Chen

2015

Soil Dynamics and Earthquake Engineering

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“…Experimental studies have been also 38 conducted for the evaluation of the seismic behavior of actual case studies during retrofitting 39 projects (Adalier et al, 2003;Chou et al, 2010). Although there are some published 40 experimental programs investigating the behaviour of rectangular embedded structures, where 41 strain gauges were employed to record the lining forces (e.g.…”

Section: A Note On Versionsmentioning

confidence: 99%

Calibration of Strain Gauged Square Tunnels for Centrifuge Testing

et al. 2016

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Access from the University of Nottingham repository:http://eprints.nottingham.ac.uk/34803/1/2016%20-%20Tsinidis%20-%20Geotechnical %20and%20Geological%20Engineering%20-%20Calibration%20of%20Strain%20Gauged %20Square%20Tunnels%20for%20Centrifuge%20Testing.pdf Copyright and reuse:The Nottingham ePrints service makes this work by researchers of the University of Nottingham available open access under the following conditions. This article is made available under the University of Nottingham End User licence and may be reused according to the conditions of the licence. For more details see: http://eprints.nottingham.ac.uk/end_user_agreement.pdf A note on versions:The version presented here may differ from the published version or from the version of record. If you wish to cite this item you are advised to consult the publisher's version. Please see the repository url above for details on accessing the published version and note that access may require a subscription.For more information, please contact eprints@nottingham.ac.uk aiming at the investigation of the seismic response of underground strcutures and tunnels 35 (Shabayama et al., 2010, Lanzano et al., 2012Cilingir and Madabhushi, 2011a, 2011b, 36 2011c Chian and Madabhushi, 2011;Chen et al., 2013;Chen and Shen, 2014; Tsinidis et al., 37 2015a;Ulgen et al., 2015;Abuhajar et al., 2015). Experimental studies have been also 38 conducted for the evaluation of the seismic behavior of actual case studies during retrofitting 39 projects (Adalier et al., 2003;Chou et al., 2010). Although there are some published 40 experimental programs investigating the behaviour of rectangular embedded structures, where 41 strain gauges were employed to record the lining forces (e.g. Chen and Shen, 2014), no clear 42 reference is given for the calibration of these crucial instruments. 43 Calibration of Strain Gauged Square Tunnels for CentrifugeThis lack of reference, along with the need for more artificial 'case studies', motivated the 44 realisation of the collaborative experimental project TUNNELSEIS, through the EU funded 45 research project SERIES. Within the framework of this research project, the seismic response 46 of shallow square tunnels embedded in dry sand was investigated by means of dynamic 47 centrifuge tests. The tests were carried out at the geotechnical centrifuge facility of the 48 Schofield Centre, University of Cambridge. This technical note summarizes the calibration 49 procedure followed for the resistance strain gauges, which were used to record the lining 50 forces and highlighting the significance of advanced numerical simulation in the calibration 51 procedure of complex construction models. 52 53 Description of centrifuge tests undertaken 54Three dynamic centrifuge tests were performed on square tunnel models embedded in dry 55Hostun HN31 sand, reconstituted at two different relative densities of about 50 % and 90 %. 56Two square tunnel models were manufactured and tested, namely: a relative rigid one 57 having a thickness of 2 mm and a more flexi...

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Centrifuge Modeling of Seismically Induced Uplift for the BART Transbay Tube

Cited by 86 publications

References 3 publications

Seismic interaction of underground RC ducts and neighboring bridge piers in liquefiable soil foundation

Seismic interaction of underground RC ducts and neighboring bridge piers in liquefiable soil foundation

Micro- and macro-observations of liquefaction of saturated sand around buried structures in centrifuge shaking table tests

Calibration of Strain Gauged Square Tunnels for Centrifuge Testing

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