MIDAS Expert Webinar: Fragility Assessment of Multi-Span Precast Concrete Girder Bridge

seismic assessment , AASHTO LRFD , Fragility Analysis , Cascadia Subduction Zone , Risk Targeted Approach , MW 9.0 earthquake .
Fragility Assessment

A super quick read.

Author: MIDASoft

Publish Date: 28 May, 2024

Midas Engineering Videos Series (3)-3

Engineers! Watch this Webinar to learn about the significant seismic risks facing aging bridges in the Pacific Northwest, especially those built before 1990. With the high probability of a MW 9.0 earthquake from the Cascadia Subduction Zone, it's crucial to understand how outdated seismic design standards impact bridge safety.

Key Topics:
Seismic Vulnerability: Effects of outdated design standards on bridge safety, focusing on column displacement ductility.
Shear Failure Risk: Assessing the risk of shear failure in bridge columns during long-duration earthquakes using fragility analysis.
Risk-Targeted Approach: Introduction to the 2023 AASHTO Guide Specifications for LRFD Seismic Bridge Design, emphasizing a probabilistic approach to ground motion hazards.
Case Study: Evaluation of an existing multi-span precast concrete girder (MSPCG) bridge designed before 1990 using modern risk-targeted methodologies.

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