INSTRUCTIONS: View the recorded webinar. Complete 10-question quiz with a score of 80% or higher to receive a certificate for 0.10 CEU (equivalent to 1.0 PDH).
Continuing Education Credit: 0.10 CEU (1.0 PDH)
Approved AIA and ICC
Access Period: 30 days
Risk acceptance criteria play a critical role in the safety evaluation and repair design of existing concrete structures. These criteria not only ensure structural safety but also determine the costs required to meet the criteria. Ideally, risk acceptance criteria should affirm the public’s confidence on structure safety. However, the current practices are driven primarily by economic constraints. “How safe is safe enough?” for our deteriorating concrete structures has become a subject of heated debate among property owners, government agencies, commercial insurers and the public, all of whom are active stakeholders in a risk-informed decision making process for structural safety.
This presentation reviews the structural reliability and risk criteria in ASCE 7 “Minimum Design Loads and Associated Criteria for Buildings and Other Structures” for new structure design, followed by a comparison of the risk characteristics of new structure design to the evaluation of existing structures. This presentation also compares the public’s risk tolerance represented by daily events such as traffic accident rates, health and OSHA safety requirements with the current structural reliability and risk criteria. Finally, this presentation discusses the best practices in developing unified risk criteria for existing concrete structures, where all the considerations on safety, economic, environmental, and social aspects are explicitly included.
Declaimer: the work presented herein is not related to the author's employment at the Naval Facilities Engineering and Expeditionary Warfare Center (NAVFAC EXWC) in Port Hueneme, California, USA. The views, information or options expressed in the presentation are solely those of the author and do not necessarily reflect the views of NAVFAC EXWC or any other governmental agencies. NAVFAC EXWC is not responsible and does not verify for accuracy of any information contained in this presentation.
This is a recorded webinar from May 3, 2022.
Author: Ming Liu
Categories: Inspection, Repair
Formats: Online Learning
Table of Contents
1. Review structural reliability and risk criteria in ASCE/SEI 7 for new structure design.
2. Compare risk characteristics in new structure design to the evaluation of existing structures.
3. Develop conveyable risk acceptance criteria that affirm public confidence on structural safety.
4. Discuss best practices in developing unified risk criteria for existing concrete structure.
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