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Failure assessment of skew RC bridges with FRP piers based on damage indices.

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Title: Failure assessment of skew RC bridges with FRP piers based on damage indices.
Authors: Mahboubi, S.1 (AUTHOR), Shiravand, M.R.1 (AUTHOR) m_shiravand@sbu.ac.ir
Source: Engineering Failure Analysis. May2019, Vol. 99, p153-168. 16p.
Subjects: Bridge foundations & piers, Professional Golfers' Association of America, Seismic testing, Seismograms, Earthquake zones, Effect of earthquakes on buildings, Earthquake damage, Reinforced concrete, Nonlinear analysis
Abstract: Abstract Extensive damage to skew bridges during last earthquakes highlighted the vulnerability of these bridges to seismic loads and led researchers to study on damage assessment and rehabilitation methods of skew bridges. Using damage indices is a conventional approach to quantify the level of seismic damage in structures. Damage indices are defined as functions of structural parameters and are of great importance in retrofit decision-making in seismic zones. The main objective of present study is to quantify seismic damage of skew reinforced concrete (RC) bridge piers, retrofitted with carbon fiber reinforced polymer (CFRP) using displacement-based, energy-based and stiffness-based damage indices. To this end, numerical models of continuous-span RC bridges with skew angles of 0°, 10°, 20° and 30° are developed and nonlinear time-history analysis is performed using a series of selected ground motion records. The damage indices are calculated for bridge piers to study effects of the skew angle, pier height, CFRP-retrofitting and different PGA of earthquake records. Results indicate that the increase in the skew angle increases the damage level of bridge piers, particularly for bridge with taller piers. On the other hand, damage indices show that effect of CFRP-confinement increases significantly for bridges with taller piers at higher skew angles. Highlights • Displacement, energy and stiffness-based indices are used for damage assessment. • Effects of skewness, pier height and FRP-retrofitting are investigated in bridges. • Drift and energy-based damage indices are more suitable for skew bridges. • Damage indices show that FRP-confinement effects is increased in tall skew piers. [ABSTRACT FROM AUTHOR]
Copyright of Engineering Failure Analysis 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.)
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DbLabel: Engineering Source
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  Data: Failure assessment of skew RC bridges with FRP piers based on damage indices.
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  Data: <searchLink fieldCode="DE" term="%22Bridge+foundations+%26+piers%22">Bridge foundations & piers</searchLink><br /><searchLink fieldCode="DE" term="%22Professional+Golfers'+Association+of+America%22">Professional Golfers' Association of America</searchLink><br /><searchLink fieldCode="DE" term="%22Seismic+testing%22">Seismic testing</searchLink><br /><searchLink fieldCode="DE" term="%22Seismograms%22">Seismograms</searchLink><br /><searchLink fieldCode="DE" term="%22Earthquake+zones%22">Earthquake zones</searchLink><br /><searchLink fieldCode="DE" term="%22Effect+of+earthquakes+on+buildings%22">Effect of earthquakes on buildings</searchLink><br /><searchLink fieldCode="DE" term="%22Earthquake+damage%22">Earthquake damage</searchLink><br /><searchLink fieldCode="DE" term="%22Reinforced+concrete%22">Reinforced concrete</searchLink><br /><searchLink fieldCode="DE" term="%22Nonlinear+analysis%22">Nonlinear analysis</searchLink>
– Name: Abstract
  Label: Abstract
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  Data: Abstract Extensive damage to skew bridges during last earthquakes highlighted the vulnerability of these bridges to seismic loads and led researchers to study on damage assessment and rehabilitation methods of skew bridges. Using damage indices is a conventional approach to quantify the level of seismic damage in structures. Damage indices are defined as functions of structural parameters and are of great importance in retrofit decision-making in seismic zones. The main objective of present study is to quantify seismic damage of skew reinforced concrete (RC) bridge piers, retrofitted with carbon fiber reinforced polymer (CFRP) using displacement-based, energy-based and stiffness-based damage indices. To this end, numerical models of continuous-span RC bridges with skew angles of 0°, 10°, 20° and 30° are developed and nonlinear time-history analysis is performed using a series of selected ground motion records. The damage indices are calculated for bridge piers to study effects of the skew angle, pier height, CFRP-retrofitting and different PGA of earthquake records. Results indicate that the increase in the skew angle increases the damage level of bridge piers, particularly for bridge with taller piers. On the other hand, damage indices show that effect of CFRP-confinement increases significantly for bridges with taller piers at higher skew angles. Highlights • Displacement, energy and stiffness-based indices are used for damage assessment. • Effects of skewness, pier height and FRP-retrofitting are investigated in bridges. • Drift and energy-based damage indices are more suitable for skew bridges. • Damage indices show that FRP-confinement effects is increased in tall skew piers. [ABSTRACT FROM AUTHOR]
– Name: AbstractSuppliedCopyright
  Label:
  Group: Ab
  Data: <i>Copyright of Engineering Failure Analysis 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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RecordInfo BibRecord:
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      – Type: doi
        Value: 10.1016/j.engfailanal.2019.02.010
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      – Code: eng
        Text: English
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        PageCount: 16
        StartPage: 153
    Subjects:
      – SubjectFull: Bridge foundations & piers
        Type: general
      – SubjectFull: Professional Golfers' Association of America
        Type: general
      – SubjectFull: Seismic testing
        Type: general
      – SubjectFull: Seismograms
        Type: general
      – SubjectFull: Earthquake zones
        Type: general
      – SubjectFull: Effect of earthquakes on buildings
        Type: general
      – SubjectFull: Earthquake damage
        Type: general
      – SubjectFull: Reinforced concrete
        Type: general
      – SubjectFull: Nonlinear analysis
        Type: general
    Titles:
      – TitleFull: Failure assessment of skew RC bridges with FRP piers based on damage indices.
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            NameFull: Mahboubi, S.
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            NameFull: Shiravand, M.R.
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            – D: 01
              M: 05
              Text: May2019
              Type: published
              Y: 2019
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              Value: 99
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            – TitleFull: Engineering Failure Analysis
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