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Seismically Induced Ground Deformation and Reduction of Impact on Bridge Systems
Seismically induced ground deformations are observed to cause damage to the bridge superstructure and its foundation. Piles and pile groups may experience excessive lateral permanent displacements and loads, which translate into various mechanisms of potential damage to the bridge. In an attempt to reduce the detrimental consequences of such ground deformations, a number of bridge configurations are suggested, in which: (1) the foundations are placed at locations of potentially lower lateral deformations, (2) a shallow foundation is employed, (3) the bridge deck is employed as a strut to shore the slopes on both sides of the canyon, and (4) the canyon slopes are braced using the bridge superstructure and its foundation. In this study, the characteristics of the involved lateral ground deformations are discussed. On this basis, schematics of the proposed bridge configurations are presented. Furthermore, illustrative idealized two-dimensional (2D) finite-element computational simulations are included, motivated by observations from post-earthquake reconnaissance data. The presented outcomes and conclusions provide insights for bridge retrofit efforts or for new construction.
Seismically Induced Ground Deformation and Reduction of Impact on Bridge Systems
Seismically induced ground deformations are observed to cause damage to the bridge superstructure and its foundation. Piles and pile groups may experience excessive lateral permanent displacements and loads, which translate into various mechanisms of potential damage to the bridge. In an attempt to reduce the detrimental consequences of such ground deformations, a number of bridge configurations are suggested, in which: (1) the foundations are placed at locations of potentially lower lateral deformations, (2) a shallow foundation is employed, (3) the bridge deck is employed as a strut to shore the slopes on both sides of the canyon, and (4) the canyon slopes are braced using the bridge superstructure and its foundation. In this study, the characteristics of the involved lateral ground deformations are discussed. On this basis, schematics of the proposed bridge configurations are presented. Furthermore, illustrative idealized two-dimensional (2D) finite-element computational simulations are included, motivated by observations from post-earthquake reconnaissance data. The presented outcomes and conclusions provide insights for bridge retrofit efforts or for new construction.
Seismically Induced Ground Deformation and Reduction of Impact on Bridge Systems
Elgamal, Ahmed (author) / Qiu, Zhijian (author)
Geo-Congress 2022 ; 2022 ; Charlotte, North Carolina
Geo-Congress 2022 ; 291-299
2022-03-17
Conference paper
Electronic Resource
English
Seismically Induced Ground Deformation and Reduction of Impact on Bridge Systems
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