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Seismic Design and Performance Assessment of the Post-tensioned Bridge Piers
Post-tensioned (PT) rocking piers have emerged as a promising solution for bridge substructures, significantly increasing their seismic performance and resilience. These piers are characterized by unbonded PT tendon and energy dissipation (ED) components providing, respectively, self-centering and dissipating capacities. Despite the potential advantages, their practical applications are still limited due to the lack of design standards and guidelines. In this context, developing a simple design procedure represents an essential step in making the use of such systems more accessible to the bridge design community. The present study introduces a design procedure for PT bridge piers by defining a performance index λ related to both initial PT force level and ED device amount. The design process is based on the improvement of a conventional monolithic bridge pier (i.e., similar dimensions and steel amount with superior self-centering behavior and load resistance). For illustration purposes, the design procedure is applied to a case study bridge pier, and its seismic performance is compared with the corresponding conventional monolithic pier. The results show that a PT bridge pier that satisfies the design objectives of residual drift and lateral force (i.e., superior self-centering behavior and load resistance) can be conceived and designed through the proposed simple design approach.
Seismic Design and Performance Assessment of the Post-tensioned Bridge Piers
Post-tensioned (PT) rocking piers have emerged as a promising solution for bridge substructures, significantly increasing their seismic performance and resilience. These piers are characterized by unbonded PT tendon and energy dissipation (ED) components providing, respectively, self-centering and dissipating capacities. Despite the potential advantages, their practical applications are still limited due to the lack of design standards and guidelines. In this context, developing a simple design procedure represents an essential step in making the use of such systems more accessible to the bridge design community. The present study introduces a design procedure for PT bridge piers by defining a performance index λ related to both initial PT force level and ED device amount. The design process is based on the improvement of a conventional monolithic bridge pier (i.e., similar dimensions and steel amount with superior self-centering behavior and load resistance). For illustration purposes, the design procedure is applied to a case study bridge pier, and its seismic performance is compared with the corresponding conventional monolithic pier. The results show that a PT bridge pier that satisfies the design objectives of residual drift and lateral force (i.e., superior self-centering behavior and load resistance) can be conceived and designed through the proposed simple design approach.
Seismic Design and Performance Assessment of the Post-tensioned Bridge Piers
Lecture Notes in Civil Engineering
Cimellaro, Gian Paolo (editor) / Shen, Yu (author) / Freddi, Fabio (author) / Li, Jianzhong (author) / Li, Yongxing (author)
World Conference on Seismic Isolation ; 2022 ; Turin, Italy
Seismic Isolation, Energy Dissipation and Active Vibration Control of Structures ; Chapter: 36 ; 438-446
2023-01-07
9 pages
Article/Chapter (Book)
Electronic Resource
English
Bridge engineering , Unbonded post-tensioned piers , Performance index , Seismic , Design approach Engineering , Geoengineering, Foundations, Hydraulics , Geotechnical Engineering & Applied Earth Sciences , Fire Science, Hazard Control, Building Safety , Building Construction and Design , Cultural Heritage
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