A platform for research: civil engineering, architecture and urbanism
A platform for research: civil engineering, architecture and urbanism
Longitudinal seismic fragility assessment of an integral bridge-ground system in liquefaction-induced lateral spreads
https://orcid.org/0000-0002-9312-4170
https://orcid.org/0000-0001-7883-568X
https://orcid.org/0000-0002-3241-9143
https://orcid.org/0000-0002-9845-1875
Abstract Liquefied soils may induce widespread permanent ground deformation in the vicinity of abutments and cause extensive damage to bridge foundations during earthquakes. As such, it is essential to systematically assess the performance of bridges susceptible to earthquake hazards and associated soil liquefaction. Motivated by details of an actual 18-span bridge system, a three-dimensional (3D) nonlinear Finite Element (FE) framework is presented to quantify the damage exceedance probability conditioned on various earthquake intensity levels. An optimal intensity measure is identified by overall consideration of correlation, efficiency, and coefficient of variation to reduce the degree of uncertainty in the probabilistic seismic demand model, thus enhancing the confidence in the corresponding fragility results. To capture the salient mechanisms associated with soil liquefaction, this study focuses on the longitudinal seismic performance of bridge-ground as an integral system exposed to earthquake hazards. Within the developed 3D FE framework, the potential of geotechnical and structural mitigation measures is explored to reduce the vulnerability of the bridge structure. It is shown that the vulnerability of the bridge at some locations of interest is noticeably reduced by employing these measures. Overall, the 3D FE analysis technique and derived insights are of significance for the seismic response and fragility assessment of integral bridge-ground systems in liquefaction-induced lateral spreads.
Highlights Longitudinal seismic fragility of an integral bridge-ground system under liquefaction-induced lateral spreading is studied. An optimal intensity measure is identified by overall consideration of correlation, efficiency, and coefficient of variation. Effects of sand permeability and retrofit options to potentially reduce the seismic vulnerability of the bridge are examined. Bridge's global connectivity and the abutment-to-abutment interaction may significantly affect the vulnerability.
Longitudinal seismic fragility assessment of an integral bridge-ground system in liquefaction-induced lateral spreads
https://orcid.org/0000-0002-9312-4170
https://orcid.org/0000-0001-7883-568X
https://orcid.org/0000-0002-3241-9143
https://orcid.org/0000-0002-9845-1875
Abstract Liquefied soils may induce widespread permanent ground deformation in the vicinity of abutments and cause extensive damage to bridge foundations during earthquakes. As such, it is essential to systematically assess the performance of bridges susceptible to earthquake hazards and associated soil liquefaction. Motivated by details of an actual 18-span bridge system, a three-dimensional (3D) nonlinear Finite Element (FE) framework is presented to quantify the damage exceedance probability conditioned on various earthquake intensity levels. An optimal intensity measure is identified by overall consideration of correlation, efficiency, and coefficient of variation to reduce the degree of uncertainty in the probabilistic seismic demand model, thus enhancing the confidence in the corresponding fragility results. To capture the salient mechanisms associated with soil liquefaction, this study focuses on the longitudinal seismic performance of bridge-ground as an integral system exposed to earthquake hazards. Within the developed 3D FE framework, the potential of geotechnical and structural mitigation measures is explored to reduce the vulnerability of the bridge structure. It is shown that the vulnerability of the bridge at some locations of interest is noticeably reduced by employing these measures. Overall, the 3D FE analysis technique and derived insights are of significance for the seismic response and fragility assessment of integral bridge-ground systems in liquefaction-induced lateral spreads.
Highlights Longitudinal seismic fragility of an integral bridge-ground system under liquefaction-induced lateral spreading is studied. An optimal intensity measure is identified by overall consideration of correlation, efficiency, and coefficient of variation. Effects of sand permeability and retrofit options to potentially reduce the seismic vulnerability of the bridge are examined. Bridge's global connectivity and the abutment-to-abutment interaction may significantly affect the vulnerability.
Longitudinal seismic fragility assessment of an integral bridge-ground system in liquefaction-induced lateral spreads
https://orcid.org/0000-0002-9312-4170
https://orcid.org/0000-0001-7883-568X
https://orcid.org/0000-0002-3241-9143
https://orcid.org/0000-0002-9845-1875
Abstract Liquefied soils may induce widespread permanent ground deformation in the vicinity of abutments and cause extensive damage to bridge foundations during earthquakes. As such, it is essential to systematically assess the performance of bridges susceptible to earthquake hazards and associated soil liquefaction. Motivated by details of an actual 18-span bridge system, a three-dimensional (3D) nonlinear Finite Element (FE) framework is presented to quantify the damage exceedance probability conditioned on various earthquake intensity levels. An optimal intensity measure is identified by overall consideration of correlation, efficiency, and coefficient of variation to reduce the degree of uncertainty in the probabilistic seismic demand model, thus enhancing the confidence in the corresponding fragility results. To capture the salient mechanisms associated with soil liquefaction, this study focuses on the longitudinal seismic performance of bridge-ground as an integral system exposed to earthquake hazards. Within the developed 3D FE framework, the potential of geotechnical and structural mitigation measures is explored to reduce the vulnerability of the bridge structure. It is shown that the vulnerability of the bridge at some locations of interest is noticeably reduced by employing these measures. Overall, the 3D FE analysis technique and derived insights are of significance for the seismic response and fragility assessment of integral bridge-ground systems in liquefaction-induced lateral spreads.
Highlights Longitudinal seismic fragility of an integral bridge-ground system under liquefaction-induced lateral spreading is studied. An optimal intensity measure is identified by overall consideration of correlation, efficiency, and coefficient of variation. Effects of sand permeability and retrofit options to potentially reduce the seismic vulnerability of the bridge are examined. Bridge's global connectivity and the abutment-to-abutment interaction may significantly affect the vulnerability.
Longitudinal seismic fragility assessment of an integral bridge-ground system in liquefaction-induced lateral spreads
Qiu, Zhijian (author) / Yu, Zhiquan (author) / Su, Lei (author) / Prabhakaran, Athul (author) / Elgamal, Ahmed (author) / Wang, Xiang (author)
2023-02-13
Article (Journal)
Electronic Resource
English
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