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Rotational excitation of bridges supported on pile groups in soft or liquefiable soil deposits.

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Title: Rotational excitation of bridges supported on pile groups in soft or liquefiable soil deposits.
Authors: Sextos, Anastasios G.1,2 asextos@civil.auth.gr, Mylonakis, George E.2,3,4, Mylona, Elli-Konstantina V.1
Source: Computers & Structures. Jul2015, Vol. 155, p54-66. 13p.
Subjects: Piles & pile driving, Soils, Seismic response, Reinforced concrete, Concrete bridges
Abstract: This paper investigates the seismic response of reinforced concrete bridges founded on pile groups in soft or liquefiable soil deposits under simultaneous translational and rotational earthquake excitation. The pile cap rotational excitation results from pile bending under vertically propagating seismic S-waves. The response of the pile cap (in terms of displacement and rotation) defines the Foundation Input Motion (F.I.M.) computed through kinematic interaction analysis. The resulting superstructure demand due to the coupled translational and rotational excitation is compared to the demand developed due to translational only F.I.M. The results confirm earlier observations regarding the impact of pile bending on rigid body rotations of bridges founded with cast-in-drilled hole single piles. It is also shown that the excitation mechanism of pile groups in soft soils is non-uniform along the pile length, thus exciting higher modes of vibration and inducing out-of-phase translational and rotational response of the pile cap. [ABSTRACT FROM AUTHOR]
Copyright of Computers & Structures is the property of Pergamon Press - An Imprint of Elsevier Science and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)
Database: Engineering Source
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Header DbId: egs
DbLabel: Engineering Source
An: 102981884
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PubType: Academic Journal
PubTypeId: academicJournal
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  Data: Rotational excitation of bridges supported on pile groups in soft or liquefiable soil deposits.
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  Data: <searchLink fieldCode="AR" term="%22Sextos%2C+Anastasios+G%2E%22">Sextos, Anastasios G.</searchLink><relatesTo>1,2</relatesTo><i> asextos@civil.auth.gr</i><br /><searchLink fieldCode="AR" term="%22Mylonakis%2C+George+E%2E%22">Mylonakis, George E.</searchLink><relatesTo>2,3,4</relatesTo><br /><searchLink fieldCode="AR" term="%22Mylona%2C+Elli-Konstantina+V%2E%22">Mylona, Elli-Konstantina V.</searchLink><relatesTo>1</relatesTo>
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  Data: <searchLink fieldCode="JN" term="%22Computers+%26+Structures%22">Computers & Structures</searchLink>. Jul2015, Vol. 155, p54-66. 13p.
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  Data: <searchLink fieldCode="DE" term="%22Piles+%26+pile+driving%22">Piles & pile driving</searchLink><br /><searchLink fieldCode="DE" term="%22Soils%22">Soils</searchLink><br /><searchLink fieldCode="DE" term="%22Seismic+response%22">Seismic response</searchLink><br /><searchLink fieldCode="DE" term="%22Reinforced+concrete%22">Reinforced concrete</searchLink><br /><searchLink fieldCode="DE" term="%22Concrete+bridges%22">Concrete bridges</searchLink>
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  Label: Abstract
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  Data: This paper investigates the seismic response of reinforced concrete bridges founded on pile groups in soft or liquefiable soil deposits under simultaneous translational and rotational earthquake excitation. The pile cap rotational excitation results from pile bending under vertically propagating seismic S-waves. The response of the pile cap (in terms of displacement and rotation) defines the Foundation Input Motion (F.I.M.) computed through kinematic interaction analysis. The resulting superstructure demand due to the coupled translational and rotational excitation is compared to the demand developed due to translational only F.I.M. The results confirm earlier observations regarding the impact of pile bending on rigid body rotations of bridges founded with cast-in-drilled hole single piles. It is also shown that the excitation mechanism of pile groups in soft soils is non-uniform along the pile length, thus exciting higher modes of vibration and inducing out-of-phase translational and rotational response of the pile cap. [ABSTRACT FROM AUTHOR]
– Name: AbstractSuppliedCopyright
  Label:
  Group: Ab
  Data: <i>Copyright of Computers & Structures is the property of Pergamon Press - An Imprint of Elsevier Science and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract.</i> (Copyright applies to all Abstracts.)
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        Value: 10.1016/j.compstruc.2015.02.013
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      – Code: eng
        Text: English
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        PageCount: 13
        StartPage: 54
    Subjects:
      – SubjectFull: Piles & pile driving
        Type: general
      – SubjectFull: Soils
        Type: general
      – SubjectFull: Seismic response
        Type: general
      – SubjectFull: Reinforced concrete
        Type: general
      – SubjectFull: Concrete bridges
        Type: general
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      – TitleFull: Rotational excitation of bridges supported on pile groups in soft or liquefiable soil deposits.
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              Text: Jul2015
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