Generation-2 Fragility Models for California Highway Bridges

Zheng, Qiu; Yang, Walter C.S.; Roblee, Cliff J.; DesRoches, Reginald

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Generation-2 Fragility Models for California Highway Bridges

2025-08-01
By Zheng, Qiu ; Yang, Walter C.S. ; Roblee, Cliff J. ; ...

File Language:

English

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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:

Analysis Box Girders Finite Element Method Highway Bridges Probability Seismic Fragility Modeling Seismicity
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
Collection(s):

US Transportation Collection
Main Document Checksum:

urn:sha-512:a11aa0404cf80fbe127536339f2a8b10b9f04fff617e001ce66163813098741adc95c97e7aaeff463dfb59014e1f900766f34c73409cbcb379e518fb9963c279
Download URL:

https://rosap.ntl.bts.gov/view/dot/87014/dot_87014_DS1.pdf
File Type:

[PDF - 48.36 MB ]

File Language:

English

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