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Significance of non-stationary characteristics of ground-motion on structural damage: shaking table study.

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Title: Significance of non-stationary characteristics of ground-motion on structural damage: shaking table study.
Authors: Kashani, Mohammad M.1 (AUTHOR) mehdi.kashani@soton.ac.uk, Ge, Xiao2 (AUTHOR), Dietz, Matthew S.2 (AUTHOR), Crewe, Adam J.2 (AUTHOR), Alexander, Nicholas A.2 (AUTHOR)
Source: Bulletin of Earthquake Engineering. Sep2019, Vol. 17 Issue 9, p4885-4907. 23p.
Subject Terms: *Shaking table tests, *Volterra series, *Time-frequency analysis, *Statistical hypothesis testing, *Reinforced concrete, *Hurricane damage, *Seismic testing, *Hilbert-Huang transform
Abstract: This paper reports the results of a set of benchmark medium-scale shaking table tests to investigate the significance of the non-stationary characteristics of ground-motion on nonlinear dynamic responses and the structural damage of reinforced concrete (RC) columns. To examine the influence of ground-motion characteristics, four RC columns are tested under (1) near-field without pulse, (2) near-field pulse-like, and (3) far-field ground-motions. These ground-motion records were spectrally matched by the reweighted Volterra series algorithm without changing non-ergodic characteristics. To explore the confinement effects, two sets of column specimens are designed to represent the modern well-confined and older lightly-confined RC columns. Each column is tested in slight, extensive and complete damage limit states. Then aftershock excitations are conducted to investigate the performance of severely damaged RC columns. Low amplitude white-noise tests are conducted on pristine columns and after each damage limit state experiment to detect natural frequency variant of damaged columns using transfer function estimate. Furthermore, using time–frequency analysis, the real-time variant frequency of test specimens is estimated. The significant duration of ground-motions accounting for the effect of non-stationary characteristics of ground-motion is also estimated by time-cumulative damage analysis of the test results. Finally, the time-variant stiffness degradation of RC columns is estimated. [ABSTRACT FROM AUTHOR]
Database: Energy & Power Source
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  Label: Title
  Group: Ti
  Data: Significance of non-stationary characteristics of ground-motion on structural damage: shaking table study.
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  Data: <searchLink fieldCode="AR" term="%22Kashani%2C+Mohammad+M%2E%22">Kashani, Mohammad M.</searchLink><relatesTo>1</relatesTo> (AUTHOR)<i> mehdi.kashani@soton.ac.uk</i><br /><searchLink fieldCode="AR" term="%22Ge%2C+Xiao%22">Ge, Xiao</searchLink><relatesTo>2</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Dietz%2C+Matthew+S%2E%22">Dietz, Matthew S.</searchLink><relatesTo>2</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Crewe%2C+Adam+J%2E%22">Crewe, Adam J.</searchLink><relatesTo>2</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Alexander%2C+Nicholas+A%2E%22">Alexander, Nicholas A.</searchLink><relatesTo>2</relatesTo> (AUTHOR)
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  Data: <searchLink fieldCode="JN" term="%22Bulletin+of+Earthquake+Engineering%22">Bulletin of Earthquake Engineering</searchLink>. Sep2019, Vol. 17 Issue 9, p4885-4907. 23p.
– Name: Subject
  Label: Subject Terms
  Group: Su
  Data: *<searchLink fieldCode="DE" term="%22Shaking+table+tests%22">Shaking table tests</searchLink><br />*<searchLink fieldCode="DE" term="%22Volterra+series%22">Volterra series</searchLink><br />*<searchLink fieldCode="DE" term="%22Time-frequency+analysis%22">Time-frequency analysis</searchLink><br />*<searchLink fieldCode="DE" term="%22Statistical+hypothesis+testing%22">Statistical hypothesis testing</searchLink><br />*<searchLink fieldCode="DE" term="%22Reinforced+concrete%22">Reinforced concrete</searchLink><br />*<searchLink fieldCode="DE" term="%22Hurricane+damage%22">Hurricane damage</searchLink><br />*<searchLink fieldCode="DE" term="%22Seismic+testing%22">Seismic testing</searchLink><br />*<searchLink fieldCode="DE" term="%22Hilbert-Huang+transform%22">Hilbert-Huang transform</searchLink>
– Name: Abstract
  Label: Abstract
  Group: Ab
  Data: This paper reports the results of a set of benchmark medium-scale shaking table tests to investigate the significance of the non-stationary characteristics of ground-motion on nonlinear dynamic responses and the structural damage of reinforced concrete (RC) columns. To examine the influence of ground-motion characteristics, four RC columns are tested under (1) near-field without pulse, (2) near-field pulse-like, and (3) far-field ground-motions. These ground-motion records were spectrally matched by the reweighted Volterra series algorithm without changing non-ergodic characteristics. To explore the confinement effects, two sets of column specimens are designed to represent the modern well-confined and older lightly-confined RC columns. Each column is tested in slight, extensive and complete damage limit states. Then aftershock excitations are conducted to investigate the performance of severely damaged RC columns. Low amplitude white-noise tests are conducted on pristine columns and after each damage limit state experiment to detect natural frequency variant of damaged columns using transfer function estimate. Furthermore, using time–frequency analysis, the real-time variant frequency of test specimens is estimated. The significant duration of ground-motions accounting for the effect of non-stationary characteristics of ground-motion is also estimated by time-cumulative damage analysis of the test results. Finally, the time-variant stiffness degradation of RC columns is estimated. [ABSTRACT FROM AUTHOR]
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RecordInfo BibRecord:
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      – Type: doi
        Value: 10.1007/s10518-019-00668-3
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      – Code: eng
        Text: English
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        PageCount: 23
        StartPage: 4885
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      – SubjectFull: Shaking table tests
        Type: general
      – SubjectFull: Volterra series
        Type: general
      – SubjectFull: Time-frequency analysis
        Type: general
      – SubjectFull: Statistical hypothesis testing
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      – SubjectFull: Reinforced concrete
        Type: general
      – SubjectFull: Hurricane damage
        Type: general
      – SubjectFull: Seismic testing
        Type: general
      – SubjectFull: Hilbert-Huang transform
        Type: general
    Titles:
      – TitleFull: Significance of non-stationary characteristics of ground-motion on structural damage: shaking table study.
        Type: main
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          Name:
            NameFull: Kashani, Mohammad M.
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            NameFull: Ge, Xiao
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            NameFull: Dietz, Matthew S.
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            NameFull: Crewe, Adam J.
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            – D: 01
              M: 09
              Text: Sep2019
              Type: published
              Y: 2019
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              Value: 17
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              Value: 9
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            – TitleFull: Bulletin of Earthquake Engineering
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