A platform for research: civil engineering, architecture and urbanism
A platform for research: civil engineering, architecture and urbanism
Post-Tensioned Structural Concrete Bridge Piers with Self-Centering Characteristics
Reinforced concrete bridges located in regions of high seismicity are supported on highly ductile columns to avoid collapse during strong ground shaking. While conventionally designed reinforced concrete bridge columns are likely to ensure life safety, large residual displacements may exist following extreme earthquakes, necessitating long-term closure of highways while expensive repairs or even complete replacement is carried out. Thus, mitigation of post-earthquake residual displacements has become a major concern. To facilitate the implementation of new designs and potentially new technologies to mitigate post-earthquake residual displacements, a thorough evaluation of their impact is needed. A team of researchers working within the Pacific Earthquake Engineering Research (PEER) Center has been conducting such an evaluation using the PEER Performance-based Earthquake Engineering (PBEE) assessment methodology. This work has involved experimental validation, numerical modeling developments and application of the PEER PBEE methodology. This paper presents an overview of some of the results of this collaborative research, including a series of earthquake simulator tests carried out to investigate the effectiveness of the proposed design approach, numerical modeling for the prediction of residual displacements, and a case study comparison of a bridge designed according to Caltrans standards having reinforced concrete columns in one case and self-centering columns in another, evaluated using the PEER PBEE methodology.
Post-Tensioned Structural Concrete Bridge Piers with Self-Centering Characteristics
Reinforced concrete bridges located in regions of high seismicity are supported on highly ductile columns to avoid collapse during strong ground shaking. While conventionally designed reinforced concrete bridge columns are likely to ensure life safety, large residual displacements may exist following extreme earthquakes, necessitating long-term closure of highways while expensive repairs or even complete replacement is carried out. Thus, mitigation of post-earthquake residual displacements has become a major concern. To facilitate the implementation of new designs and potentially new technologies to mitigate post-earthquake residual displacements, a thorough evaluation of their impact is needed. A team of researchers working within the Pacific Earthquake Engineering Research (PEER) Center has been conducting such an evaluation using the PEER Performance-based Earthquake Engineering (PBEE) assessment methodology. This work has involved experimental validation, numerical modeling developments and application of the PEER PBEE methodology. This paper presents an overview of some of the results of this collaborative research, including a series of earthquake simulator tests carried out to investigate the effectiveness of the proposed design approach, numerical modeling for the prediction of residual displacements, and a case study comparison of a bridge designed according to Caltrans standards having reinforced concrete columns in one case and self-centering columns in another, evaluated using the PEER PBEE methodology.
Post-Tensioned Structural Concrete Bridge Piers with Self-Centering Characteristics
Lee, Won (author) / Jeong, Hyungil (author) / Billington, Sarah (author) / Mahin, Stephen A. (author) / Sakai, Junichi (author)
Research Frontiers at Structures Congress 2007 ; 2007 ; Long Beach, California, United States
2007-10-10
Conference paper
Electronic Resource
English
Post-Tensioned Structural Concrete Bridge Piers with Self-Centering Characteristics
| British Library Conference Proceedings | 2007
| Engineering Index Backfile | 1965