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STRUCTURES GUEST SPEAKERS

THE FUTURE OF DISASTER RECONNAISSANCE AIDED BY MACHINE LEARNING

Date: May 27th, 2021
Time: 10:30am – 11:30am (EST)

Reconnaissance teams collect perishable data after each disaster to learn about building performance. These data are intended to support vital research focused on identifying gaps in construction and design practices, and advancing improvements in building codes. The investment in gathering reconnaissance data after natural disasters is growing exponentially. In 2016, the U.S. National Science Foundation established a shared-use large facility known as the Natural Hazards Engineering Research Infrastructure that is dedicated to research in hazards and resilience. This presentation will focus on the use of machine learning and computer vision for automating and supporting these engineers in the field. Our aim is to develop meaningful methods to perform specific domain-oriented tasks by minimizing tedious and time-consuming tasks, and introducing automated image classification and object detection techniques to streamline typical procedures in the field. Teaching a computer to extract unbiased and task-driven information from such images requires significant amounts of data/images. Using our curated database with >100,000 images from past field reconnaissance missions around the world, we have developed the ability to automate key steps in the damage detection and data classification process. This presentation will discuss the methods developed and share important lessons from these investigations on the power of artificial intelligence to aid the work of the engineer in performing these tasks.

SPEAKER

shirley_dyke

Shirley Dyke – Professor Departments of Mechanical Engineering and Civil Engineering
Director of Purdue’s Intelligent Infrastructure Systems Lab
Director of the NASA funded Resilient ExtraTerrestrial Habitat Institute
Purdue University, USA

Professor Shirley Dyke holds a joint appointment in Mechanical Engineering and Civil Engineering at Purdue University. She is the Director of Purdue’s Intelligent Infrastructure Systems Lab and the Director of the NASA funded Resilient ExtraTerrestrial Habitat Institute. Dyke is the Editor-in-Chief of the journal Engineering Structures. Her research focuses on “intelligent” structures, and her innovations encompass structural health monitoring and machine learning for structural damage assessment and reconnaissance support. She holds a B.S. in Aeronautical and Astronautical Engineering from the University of Illinois, Champaign-Urbana in 1991 and a Ph.D. in Civil Engineering from the University of Notre Dame in 1996. She was awarded the Presidential Early Career Award for Scientists and Engineers from NSF (1998), the International Association on Structural Safety and Reliability Junior Research Award (2001) and the ANCRiSST Young Investigator Award (2006).

RESILIENT WOOD BUILDINGS FOR COMMUNITY RESILIENCE TO NATURAL HAZARDS

Date: May 27th, 2021
Time: 3:00pm – 4:00pm (EST)

Natural hazards such as earthquakes and tornadoes result in extraordinary loading to buildings and other physical infrastructure. Over the last 15 years wood and wood products have evolved to take these hazards head-on and enable better performing buildings. As buildings are designed to be taller and more versatile they continue to be expected to perform better and maintain functionality following events such as a design level earthquake or even a small tornado. This presentation will begin with past light-frame wood whole-building shake table tests around the world, focusing on challenges of height and the logical move for North America to mass timber. Moving from performance-based engineering to concepts and the practice of resilience where engineering merges with social, economic, and information science. Resilient buildings and physical infrastructure are a necessary component to achieve urban resilience to earthquakes and other natural hazards thereby supporting social and economic institutions within a community. This concept will be illustrated using a retrofit example for tornado loading across a community for light-frame wood residential buildings. Finally, coming full circle to earthquake engineering, the concept of tall post-tension rocking wall buildings where the shear forces are decoupled from vertical floor motion will be presented as a means to achieve resilient tall wood buildings in high seismic regions of the world.

SPEAKER

john-vdl

Dr. John W. van de Lindt –Department of Civil and Environmental Engineering at Colorado State University

Dr. John W. van de Lindt is the Harold H. Short Endowed Chair Professor in the Department of Civil and Environmental Engineering at Colorado State University. He has conducted nearly 50 research projects related to buildings and other systems related to earthquakes, hurricanes, tsunamis, tornadoes and floods. Van de Lindt led both the NEESWood and NEES-Soft project teams between 2005-2013 which consisted of two-story, four-story, and six-story shake table tests on the world’s largest shake tables, serves on ASCE’s Executive Committee for the Infrastructure Resilience Division and SEI. Recently, he led the effort to develop seismic performance factors (R-factor) for U.S. building codes. Van de Lindt serves as the Co-director for the National Institute of Standards and Technology-funded Center of Excellence (COE) for Risk-Based Community Resilience Planning headquartered at Colorado State University. The NIST COE is a 14-university collaboration developing the computational resilience environment IN-CORE and engaging partner communities. He has published more than 400 technical articles and reports including more than 200 journal papers, served on a number of editorial boards, and serves as the Editor-in-Chief for the Journal of Structural Engineering.

RECENT CANADIAN DEVELOPMENTS RELATED TO FRP REINFORCEMENT FOR CONCRETE STRUCTURES, DESIGN CODES, AND APPLICATIONS IN BUILDINGS AND BRIDGES

Date: May 28th, 2021
Time: 10:00am – 11:00am (EST)

The design principle of fiber-reinforced polymer (FRP) reinforcing bars for concrete structures has been well established through extensive research and field practices. Provisions governing certification testing and evaluation as well as quality control/assessment and FRP design provisions, are now in place to regulate materials specifications and design aspects and guide FRP manufacturers and end-users. The Canadian Standards Association (CSA) group addressing the state-of-the-art FRP material specifications and design requirement recently issued two updated provisions. The new edition of CSA S807 includes several additions and modifications in terms of quality and qualification requirements, material properties, testing procedures, and material mechanical and durability limitations. Additionally, the updated Section 16 of CSA S6 for the design of fiber-reinforced structures and highway bridges aimed at providing more rational design algorithms and allowing practitioners to take full advantage of the efficiency and economic appeal of FRP bars. A summary of these recent modifications in Canadian codes and standards, introducing the underlying rationale is presented. Additionally, the presentation highlights the recent Canadian developments and properties of new FRP bars and the recent field applications of FRP bars in buildings and bridges.

SPEAKER

brahim-benmokrane

Brahim Benmokrane, PhD, PEng, FRSC, FACI, FCSCE, FIIFC, FCAE, FEIC, FBEI – University of Sherbrooke

Professor Brahim Benmokrane is one of the world’s top in the field of structural concrete internally reinforced with fiber-reinforced polymer (FRP) reinforcement. He holds the Tier–1 Canada Research Chair in Advanced Composite Materials for Civil Structures and the NSERC Industrial Research Chair in Innovative FRP Reinforcement for Sustainable Concrete Infrastructures at the Department of Civil and Building Engineering at the University of Sherbrooke (Sherbrooke, QC, Canada). His research has significantly influenced the development of concrete structures reinforced with FRP bars, building codes, design specifications, and their practical use in North America and beyond. He is a Fellow of the Royal Society of Canada (Academy of Science), CSCE, ACI, CAE, IIFC, EIC, BEI. He received the NSERC Synergy Award for Innovation, CSA Medal of Merit, Conmat’15 Lifetime Achievements Award, CSCS’s P.L. Pratley Award, Grand Prix d’Excellence of the Order of Professional Engineers of Quebec, Julian C. Smith Medal of the Engineering Institute of Canada for Achievement in the Development of Canada, and the IIFC Medal of the International Institute in FRP for Construction. Professor Benmokrane has published over 650 papers, books, and book chapters and delivered over 250 lectures worldwide. As one of the world’s most cited scientists in the field (13500+ citations, h-index = 63, i10 index = 230 by Google Scholar), he leads a research group of 32 and has trained 168 researchers. More than 30 of his former students and postdoctoral researchers now hold faculty positions in Canada and abroad. Over the last 25 years, Professor Benmokrane has worked with Canadian and international companies and governments. Many world firsts go to his credit in terms of bridges, parking facilities, water-treatment plants, and tunnels (e.g., FRP use in the Nipigon Cable Stayed Bridge, Highway 40 & Champlain Bridge (Montreal), TTC Subway North Tunnels (Highway 407) (Toronto), Port of Miami Tunnel (US), and Port of Tanger Med II (Morocco).

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