January 26, 2021
Storm Shelter Design: Overview of IBC and ICC-500 Requirements
Speaker: Marc L. Levitan, PhD, National Institute of Standards and Technology (NIST)
Moderator: Jon Wacker
The Minnesota State Building Code requires tornado storm shelters to be incorporated in the design of schools, first response centers, manufactured home communities, and other facilities. This seminar will present an overview of storm shelter design requirements in the IBC and ICC-500 standard and the engineering principles supporting them. Attendees will gain an understanding of the loads on shelters, typical construction materials/details, and pertinent planning decisions to successfully implement storm shelter projects
February 2, 2021
Case Studies in Structural Engineering: Bridge Failures of the Past and Present
Speakers: Robert Accetta, National Transportation Safety Board/Office of Highway Safety; Steve Prouty, PE, National Transportation Safety Board/Office of Highway Safety; Dan Walsh, PE, National Transportation Safety Board/Office of Highway Safety; Henry Petroski, PhD, Duke University
Moderator: Arielle Ehrlich
Henry Petroski Presentation Handouts
The session will include a presentation of the NTSB investigation into the Pedestrian Bridge Collapse on March 15, 2018, in Miami, FL, and a historical perspective on failure and how it has influenced design, with examples drawn from the history of bridges.
February 9, 2021
Engineered Wood Products and Mass Timber Use in Wood Buildings
Speaker: Daniel P. Hindman, PE, PhD, Department of Sustainable Biomaterials at Virginia Tech
Moderator: Jon Wacker
The seminar will include the following: definition of EWPs with a discussion of proprietary vs. nonproprietary materials and where to find design values; use of SCL and I-joists in taller wood construction along with detailing and connections; an introduction to mass timber (Glulam & CLT) and how to design mass timber along with special considerations with CLT; and frame and lateral systems with mass timber.
February 16, 2021
Millennium Tower Foundation Repair/Failure Literacy: The Landmark Structural Failures You Should Know About
Speakers: Ronald O. Hamburger, SE, Simpson Gumpertz & Heger, Inc.; Norb Delatte, PE, PhD, FACI, FASCE, School of Civil and Environmental Engineering Oklahoma State University
Moderator: Steve Clark
Hamburger-Wagner Handout
Norb Delatte Handout
This presentation will be in two parts. First half: The 58-story Millennium Tower, constructed 2005−2009, was intended to be San Francisco’s premier residential address; however, within ten years of completion, it had settled 18 inches and tilted 17 inches to the northwest. Repairs consisting of underpinning the structure along two sides using 52 piles extending to rock are presently under construction. Second Half: It is imperative that engineers learn not only about the history of failures but also their contexts as well as their repercussions. Careful study of failures provides valuable lessons for engineering students and practicing engineers. This presentation reviews some key failures that have shaped the profession.
February 23, 2021
Wind Engineering Considerations for Bridge Design
Speakers: Jason Munn, P. Eng., RWDI; Pierre-Olivier Dallaire, P. Eng., RWDI
Moderator: Ken Walerius
The seminar will provide an understanding of the aerodynamic performance of bridges. The common effects of wind-induced vibrations and the associated impact on the design will be summarized, including the various mitigation/optimization strategies that can be adopted. The seminar will include project examples that highlight how the aerodynamic evaluation of a bridge can assist the design team for innovative and cost effective solutions on new designs and rehabilitation projects.
March 2, 2021
Case Studies in Seismic Repair and Retrofit
Speaker: Jeffrey Rautenberg, PE, SE, PhD, Kelsey Sheridan, PE, Wiss, Janney, Elstner Associates
Moderator: Scott Snelling
Jeffrey Rautenberg Presentation Slides
Kelsey Sheridan Presentation Slides
Following the 1989 Loma Prieta earthquake, the City of San Francisco enacted an ordinance requiring the seismic upgrade (or demolition) of all unreinforced masonry buildings, including the historic Temple Sherith Israel. In 2011, Washington DC experienced an earthquake that caused significant damage to many unreinforced masonry structures, including the Washington National Cathedral. This session consists of two case studies which will each review the unique structural engineering challenges associated with the seismic retrofit of these iconic masonry structures.