Generation-2 Fragility Models for California Highway Bridges

Details

• Creators:
  Zheng, Qiu ; Yang, Walter C.S. ; Roblee, Cliff J. ; DesRoches, Reginald
• Corporate Creators:
  Georgia Institute of Technology
• Corporate Contributors:
  California. Department of Transportation. Department of Research, Innovation and Systems Information
• Subject/TRT Terms:
  • Seismicity
  • Finite element method
  • Probability
  • Highway bridges
  • Box girders
  • Analysis
  • Seismic Fragility Modeling
• Publication/ Report Number:
  CA25-1780
• Resource Type:
  Tech Report
• Geographical Coverage:
  United States ; California
• Edition:
  Final Report: Aug 2013 - Jun 2022
• Corporate Publisher:
  California. Department of Transportation. Department of Research, Innovation and System Information
• Abstract:
  This report provides a summary of the framework and methodology underlying the second-generation seismic fragility work (g2F) using selected concrete box-girder bridges in California. It outlines the key components and processes involved in the g2F project designed to improve earthquake risk assessment and mitigation strategies. The report first introduces the modeling techniques that enhance numerical model fidelity. It then summarizes the development of comprehensive capacity models for bridge components, incorporation of material and geometric uncertainties, and sampling methods to ensure realistic bridge representations compliant with California design standards. The probabilistic seismic demand model (PSDM) construction is discussed, highlighting the proposed modified multiple adaptive regression splines (M-MARS) approach. Finally, the report covers the hierarchical development of fragility models, from individual components to entire bridge systems. This summary serves as an overview of the g2F framework, with detailed findings and analyses available in referenced publications.
• Format:
  PDF
• Funding:
  65A0484
• Download URL:
  https://rosap.ntl.bts.gov/view/dot/87014/dot_87014_DS1.pdf
• File Type:
  [PDF - 48.36 MB]
• Collection(s):
  US Transportation Collection
• Main Document Checksum:
  urn:sha-512:a11aa0404cf80fbe127536339f2a8b10b9f04fff617e001ce66163813098741adc95c97e7aaeff463dfb59014e1f900766f34c73409cbcb379e518fb9963c279