Blast Resistant Design

Full Session with Abstracts

338132-2 - Site adaptation of explosive threats for improved blast design efficiency

Saturday, April 21
10:00 AM - 11:30 AM
Location: 202CD

Current design criteria and project specifications increasingly require blast analysis and design of buildings to use specified charge weight and site-specific standoff distance combinations, as opposed to prescribed uniform loadings. Although this approach provides a more representative estimation of the actual air blast load environment that the building may experience, standard air blast calculation methods typically do not account for site-specific phenomena that may affect the air blast wave characteristics for high explosives. For example, calculation of design air blast loads typically does not account for environmental variables, clearing effects, or alternate methods of calculation which may lend themselves to more efficient and cost-effective blast designs. Provided is a brief review of air blast characteristics for high explosives and factors that can influence blast loads applied to the structure. The authors discuss how variables and alternate methods of determining design blast loads may potentially impact design, and provide analytical comparisons of both air blast loads and structural response using parameter variation. Real-world examples from explosive testing are provided for comparison and context, and relevant key recommendations are presented for blast design professionals and researchers globally.

Kenneth Herrle

Senior Engineer
Applied Research Associates, Inc.

Kenneth Herrle, P.E., CPP, PMP, Applied Research Associates, Inc. (ARA) - A Senior Engineer and U.S. Air Force Gulf War Veteran, Ken has supported over 20 different U.S. Government organizations and agencies, holding key roles in blast and security vulnerability assessments and designs in over 35 U.S. states and 15 countries abroad. He has directly supported the U.S. Government in analyzing improvised nuclear device (IND) detonation in U.S. urban areas and corresponding structural damage to facilities and critical infrastructure throughout the impacted zones for emergency response planning efforts. Ken has conducted over 70 large-scale explosive tests of building facade and structural systems with devices ranging from shaped charge and cased fragmenting munitions, up through high-explosive charges in the thousands of pounds of TNT equivalent, and has served as national Vice-Chair of a U.S. Department of Homeland Security working group for explosive modeling, simulation and testing. He has also served as researcher, co-author, and contributor for national-level protective design criteria, standards, guides and guidelines for various organizations such as the U.S. General Services Administration, U.S. Department of State, U.S. Federal Aviation Administration, American Society of Civil Engineers, American Institute of Steel Construction, American Institute of Architects, National Institute of Building Sciences, and others. Ken is a licensed Professional Engineer in nine states and Washington DC, and holds ASIS Certified Protection Professional and PMI Project Management Professional certifications.

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