A platform for research: civil engineering, architecture and urbanism
A platform for research: civil engineering, architecture and urbanism
Evaluation of Bridge Code Design Criteria Using Performance-Based Earthquake Engineering Methodology
Performance-based design (PBD) was adopted in the Canadian Highway Bridge Design Code (CHBDC) in 2014. The design criteria are expressed in terms of concrete and steel strains. Previous studies suggested that the CHBDC 2014 design criteria are overly conservative in high seismic regions. Subsequently, the British Columbia Ministry of Transportation and Infrastructure (BCMOTI) revised the design requirements in the national code and adopted more relaxed criteria. Following BCMOTI, the CHBDC 2019 relaxes the design limits in concrete and steel strains. In addition, while PBD is encouraged by the code, force-based design (FBD) is still permitted for certain bridges. This study compares bridge designs as per the PBD criteria in CHBDC 2014, CHBDC 2019 as well as FBD in CHBDC 2014. Time-history analyses are performed to determine the structural damage of each design at different levels of PGA. The ground motions are categorized into five types, and the damaging effects of each type of motion are discussed by comparing fragility curves. Based on the performance-based earthquake engineering (PBEE) methodology, bridge repair costs are estimated and compared among the three designs. It is expected that the most conservative design would result in the least repair cost after earthquakes. However, when considering the total cost of initial construction plus repair cost, the most conservative design may not be the most economical option. In this case study, the CHBDC 2019 design criteria result in the most economical design.
Evaluation of Bridge Code Design Criteria Using Performance-Based Earthquake Engineering Methodology
Performance-based design (PBD) was adopted in the Canadian Highway Bridge Design Code (CHBDC) in 2014. The design criteria are expressed in terms of concrete and steel strains. Previous studies suggested that the CHBDC 2014 design criteria are overly conservative in high seismic regions. Subsequently, the British Columbia Ministry of Transportation and Infrastructure (BCMOTI) revised the design requirements in the national code and adopted more relaxed criteria. Following BCMOTI, the CHBDC 2019 relaxes the design limits in concrete and steel strains. In addition, while PBD is encouraged by the code, force-based design (FBD) is still permitted for certain bridges. This study compares bridge designs as per the PBD criteria in CHBDC 2014, CHBDC 2019 as well as FBD in CHBDC 2014. Time-history analyses are performed to determine the structural damage of each design at different levels of PGA. The ground motions are categorized into five types, and the damaging effects of each type of motion are discussed by comparing fragility curves. Based on the performance-based earthquake engineering (PBEE) methodology, bridge repair costs are estimated and compared among the three designs. It is expected that the most conservative design would result in the least repair cost after earthquakes. However, when considering the total cost of initial construction plus repair cost, the most conservative design may not be the most economical option. In this case study, the CHBDC 2019 design criteria result in the most economical design.
Evaluation of Bridge Code Design Criteria Using Performance-Based Earthquake Engineering Methodology
Lecture Notes in Civil Engineering
Walbridge, Scott (editor) / Nik-Bakht, Mazdak (editor) / Ng, Kelvin Tsun Wai (editor) / Shome, Manas (editor) / Alam, M. Shahria (editor) / El Damatty, Ashraf (editor) / Lovegrove, Gordon (editor) / Zhang, Qi (author) / Soudy, Ibrahim R. (author) / Alam, M. Shahria (author)
Canadian Society of Civil Engineering Annual Conference ; 2021
Proceedings of the Canadian Society of Civil Engineering Annual Conference 2021 ; Chapter: 20 ; 225-238
2022-06-17
14 pages
Article/Chapter (Book)
Electronic Resource
English
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