Design of Concrete-Filled Steel Tubes for Use as Columns or Piles in Buildings with Seismic Design Considerations

by Dawn Lehman, Ph.D.

March 23, 2023; To be rescheduled 11:00 AM - 1:00 PM Pacific Time

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ICC Preferred Provider Course Number: 35609

Seminar Description

This presentation will describe testing and design of concrete filled steel tubes and their connections. These components are stronger and stiffer than conventional reinforced concrete and structural steel columns and piles. In addition, they do not require formwork or internal reinforcement so they can reduce construction time. This presentation provides large scale experimental testing results and new design equations for combined loading as well as high shear demands from large lateral forces including lateral spreading, liquefaction and high seismic demands. The presentation will also provide new connection designs that both mitigate damage and fully transfer the forces to adjacent reinforced concrete components such as a footing, reinforced concrete beam, pile cap, or a direct pile to column connection. New design of concentrically braced frames using A1085 braces as well as new design equations for beams in chevron configured CBFs. This will address new equations in AISC 341.

Speaker Bio

Dawn Lehman is a Professor of Civil and Environmental Engineering at the University of Washington. She received her BS from Tufts University in 1989 and her PhD from U.C. Berkeley in 1989. She worked as a structural engineer in Boston MA between these degrees. She has been a faculty member at the University of Washington since 1999. Her research expertise lies in seismic engineering of structural systems. She has conducted research on a range of systems including reinforced concrete walls and frames, steel braced frames, as well as concrete-filled-tube, precast and reinforced-concrete bridge systems. Her research results have been implemented in codes, design manuals and provisional structural engineering recommendations, including AASHTO, AISC, WSDOT BDM, Caltrans SDM, and ASCE 41. She has authored over 90 peer-reviewed research articles. She led the technical investigation of the CTS collapse as a consultant to the Miami Herald.

Registration Information

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Early Registration Discounted Fee*	$260	$460	$585	$640	$725	$130 per connection
Regular Fee	$275	$490	$630	$700	$800	$145 per connection
* Registration on or before March 21, 2023

Please note a single registration allows you to have one connection. However, a number of people can view and listen to the seminar using one connection by using an LCD projector (or a large computer monitor) and good computer speakers or a speaker phone.

All attendees, irrespective of the number of registered connections, can earn 0.2 Continuing Education Units (CEUs) or 2.0 professional development hours (PDHs). CEU/PDH certificates are provided free of charge.

FAQ

• A connection is defined as a single web connection plus a single telephone connection (if necessary). If you want to sign up for more than one connection for this seminar, you will have the opportunity to do so after placing the seminar in your cart.
• A $15 fee will apply if the seminar registrant wishes to revise the web seminar registration (e.g. switch from one web seminar to another).
• Refunds are limited to 80 percent of fee and must be applied for in writing WITHIN THIRTY DAYS after the scheduled seminar.
• We are a registered provider for continuing education in the State of Florida (Provider # 4732), the State of New York (Provider # 99), the State of New Jersey (Provider # 24GP00014200), the State of Maryland, and for the Structural Engineers Certification Board (SECB) of the National Council of Structural Engineers Associations (NCSEA).