Time:
02:20 PM - 03:30 PM
Date:
12 October 2021

EMI Session #1: Objective Resilience Part 1

Session Moderator: Mohammed Ettouney, Ph.D., P.E., Dist.M.ASCE

Presentation #1: Speaker - Amar Chaker, Ph.D., F.AEI., F.EMI, F.ASCE; ASCE

The presentation will review the evolution over the past several decades of the approaches to the design and performance objectives of civil engineering systems such as structures, transportation or flow networks subjected to various hazards, and will provide an overview of recent advances in objective resilience of infrastructure systems. These topics are a primary concern of many convention attendees responsible for the design, construction operation and maintenance of infrastructure systems.

The steady increase in expectations is highlighted, from the evaluation of the safety and reliability of a single element exposed to a single or to multiple hazards and of the risk associated with a failure, to the requirements of safety, reliability and risks associated with failures of an entire infrastructure system. These expectations are expanded further to the case of a set of interconnected, and mutually interdependent infrastructure systems. Typical strategies for enhancing system safety and reliability will be discussed.

After introducing the concept of resilience and its implication in terms of rapid recovery of functionality, several approaches for evaluating and measuring resilience are discussed: screening and prioritization techniques; scenario-based approaches; and resilience management initiatives that chart a path to increase resilience.  Finally, possible areas for further investigation are identified.

Learning Objective(s):

Attendees will:

  • Learn the approaches to the design and performance objectives of infrastructure systems such as structures, transportation, or flow networks, including their types; and the features of various hazards, threats, disruptions, or extreme events that may affect them.
  • Learn how uncertainty on the capacity and the demand can be addressed when evaluating event probabilities and conducting risk assessments.
  • Learn that resilience is a performance objective that requires rapid recovery of functionality and how resilience differs from previous disaster risk management goals. Learn several methods for evaluating and measuring resilience, including screening and prioritization techniques; scenario-based approaches; and resilience management initiatives that chart a path to increase resilience.

The Q&A segment of the session will provide the attendees with an opportunity to expand and test their understanding of the concepts and techniques presented.

    Presentation #2: Speaker - John Cross, PE, LEED AP; American Institute of Steel Construction

    Resiliency is the ability of an object or system to absorb and recover from an external shock. The material selection for a building’s structural framing system impacts the resiliency of the structure by reducing the economic and societal cost of the risk associated with the ability of the structure to absorb and recover from the stress of an extreme event.  This presentation will explore the role of material selection with respect to building and community resilience and the dynamic of balancing resilience and sustainability requirements. The various materials used for structural framing systems will be discussed based on their varying degrees of resilient performance in terms of their inherent durability, strength, elasticity, combustibility, and resistance to decomposition, as well as the ability of the structural framing systems of which they are a part to resist extreme loads, be rapidly repaired and to adapt to changing structural requirements.  In addition, metrics for evaluating resilient performance including the use of data related to Builder’s Risk and All Risk premiums in the current insurance market for structures framed with different materials will be discussed.

    Learning Objective(s):

    • Identify the role of framing material selection in the hierarchy of material-framing system-building-community resilience
    • Provide a framework for assessing the resilient performance of a building
    • Characterize structural framing materials with respect to key material characteristics that impact the resilience of a structure
    • Assess the dynamic balancing of requirements for sustainability and resilience