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

by Dawn Lehman, Ph.D.

May 16, 2023; CANCELLED 11:00 AM - 1:00 PM Pacific Time

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ICC Preferred Provider Course Number: 35609

Seminar Description

Concrete filled steel tubes (CFSTs) provide enhanced structural performance and damage mitigation as columns and piles in building and bridge structures. In particular, well designed connections can result in structural systems that can resist large lateral loading including landslides, earthquakes, tsunamis and storm surge. Relative to reinforced concrete members, they provide resist structural damage such as spalling, bar buckling and core crushing. Relative to structural steel members, they provide enhanced strength and stiffness. However, in comparison with these more common structural components, CFSTs are rarely used. This is likely because their design equations are in many different codes (e.g., ANSI/AISC 360, AISC 341, ACI 318, and AASHTO) but these equations are not consistent and in many cases underestimate the strength of these robust members. An extensive, decade-long research effort was undertaken at the University of Washington to enhance the understand, design and engineering methods for CFSTs. This webinar will provide the research results, design and analysis expressions for design of CFST columns and piles as well as new, resilient connections. The first part will review research and resulting engineering tools for the design of CFST for flexure, combined loading, and shear loading. The second part will review new connections for CFST members damage-mitigated response, including RC slab-column, column to beam/footing and direct column to pile connections.

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

	1 Connection	2 Connections	3 Connections	4 Connections	5 Connections	> 5 Connections
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 May 14, 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).