Date: November 19 20, 2021
Presenter:
Dr. Reza Fathi-Fazl, National Research Council of Canada
A multi-criteria and multi-level seismic risk management framework has been developed by NRC to ensure an acceptable and consistent level of risk for existing buildings in Canada with a focus on minimizing threats to life safety.
The framework consists of three levels: (1) Level 1: preliminary seismic-risk screening tool (PST); (2) Level 2: semi-quantitative seismic-risk screening tool (SQST); and (3) Level 3: seismic evaluation and upgrading guidelines (SEG).
Level 1 (PST) was developed based on a number of key criteria (seismicity, benchmark code edition, consequences of failure, and remaining occupancy time) to assist in exempting existing buildings from further assessment without the need for a site visit.
Level 2 (SQST) consists of three key components:
- structural scoring system that quantitatively assesses the structural seismic risk based on the probability of collapse;
- non-structural components scoring system that qualitatively evaluates the seismic risk of non-structural components based on the seismic demand of critical non-structural components; and
- ranking procedure that prioritizes buildings with potentially unacceptable seismic risk for the Level 3 (SEG) based on structural and non-structural components priority indices.
The Level3 (SEG) aims to identify the building deficiencies that lead to unacceptable seismic risk for existing buildings and to mitigate the identified deficiencies.
The video recording is restricted to members only.