A platform for research: civil engineering, architecture and urbanism
A platform for research: civil engineering, architecture and urbanism
Seismic Performance of Reinforced Concrete Bridges Allowed to Uplift during Multi-Directional Excitation
The behavior of bridges subjected to recent moderate and large earthquakes has led to bridge design detailed for better seismic performance, particularly through wider bridge foundations to handle larger expected design forces. Foundation uplift, which is not employed in conventional bridge design, has been identified as an important mechanism, in conjunction with structural yielding and soil-structure interaction that may dissipate energy during earthquakes. Preventing uplift through wider foundations looks past the technical and economic feasibility of allowing foundation uplift during seismic events. The research presented in this study is part of a larger experimental and analytical investigation to develop and validate design methods for bridge piers on shallow foundations allowed to uplift during seismic events. Several analytical and some experimental studies have been performed to assess rocking and or uplift of shallow foundation systems, however they have evaluated systems with a limited range of footing dimensions and seismic excitations. As such, there is an uncertainty in the information needed to base a performance evaluation and develop design methods. The purpose of this study is to investigate through experimental and analytical studies the seismic performance of uplifting bridge piers on shallow foundations when considering different ground motions and footing dimensions, as well as identifying key differences in performance evaluation criteria for conventional and uplifting bridge pier systems.
Seismic Performance of Reinforced Concrete Bridges Allowed to Uplift during Multi-Directional Excitation
The behavior of bridges subjected to recent moderate and large earthquakes has led to bridge design detailed for better seismic performance, particularly through wider bridge foundations to handle larger expected design forces. Foundation uplift, which is not employed in conventional bridge design, has been identified as an important mechanism, in conjunction with structural yielding and soil-structure interaction that may dissipate energy during earthquakes. Preventing uplift through wider foundations looks past the technical and economic feasibility of allowing foundation uplift during seismic events. The research presented in this study is part of a larger experimental and analytical investigation to develop and validate design methods for bridge piers on shallow foundations allowed to uplift during seismic events. Several analytical and some experimental studies have been performed to assess rocking and or uplift of shallow foundation systems, however they have evaluated systems with a limited range of footing dimensions and seismic excitations. As such, there is an uncertainty in the information needed to base a performance evaluation and develop design methods. The purpose of this study is to investigate through experimental and analytical studies the seismic performance of uplifting bridge piers on shallow foundations when considering different ground motions and footing dimensions, as well as identifying key differences in performance evaluation criteria for conventional and uplifting bridge pier systems.
Seismic Performance of Reinforced Concrete Bridges Allowed to Uplift during Multi-Directional Excitation
A. O. Espinoza (author) / S. A. Mahin (author)
2012
338 pages
Report
No indication
English
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