PROJECT

GRANTEE

PROJECT AREA

GRANT #

AWARD AMOUNT

GRANT PERIOD

GRANT STATUS

PRINCIPAL INVESTIGATORS

INDUSTRY CHAMPIONS

CPF ALLIES

RESEARCH PURPOSE

RESEARCH DELIVERABLES

Comprehensive Revision of Design Considerations for Column Base Connections in Steel Moment Frames

University of California, Davis

Structural Engineering

07-18

$250,000

December 2018 - April 2021

In Progress

Amit M. Kanvinde, Professor, University of California, Davis

Thomas J. Schlafly, American Institute of Steel Construction
Tom Sabol, Engelkirk
Rick Drake, Fluor Corporation
Joe Zona, Simpson Gumpertz & Heger
Subhash Goel, University of Michigan
Chia Ming Uang, University of California, San Diego
Tim Fraser, Steel Structures Detailing
Jim Malley, Degenkolb
Tom Kuznik, Herrick Corporation
Mason Walters, Forell/Elsesser
Geoff Bomba, Forell/Elsesser

American Institute of Steel Construction

Column base connections are arguably the most critical connections in Steel Moment Frames (SMFs), transferring forces from the entire structure into the foundation. The role of these connections is even more critical in the seismic response of SMFs because their strength, rotational stiffness and hysteretic characteristics interact with the frame, influencing force/moment distribution in the frame. This study will expand upon the available data on SMF column base connections and force transfer mechanisms including exposed with base plate and anchor rods, embedded and slab over-topped connections. The results will provide validated way to design and model these connections.

Specific objectives of the proposed research are:
To develop and disseminate fundamental understanding of the force transfer mechanisms of commonly used and previously untested embedded base connections (including those with an overtopping slab) under monotonic and cyclic loading.
To develop design methods/procedures and criteria for these connections that result in economical and reliable column base connections.
To develop and investigate repairable base connections, and their viability within seismically designed moment resisting frames.
To integrate connection response (developed in this and previous studies) with building response to develop strategies that fully leverage interactions between base and frame to obtain economical and safe designs.
To develop design aids, examples, software and other tools to facilitate the adoption of these new design insights and methods by the engineering practice.
To attain building code changes that adopt the products of this research in an effective and timely manner.
This study is follow-on to the previous study and findings reported in the Embedded Column Base Connections Subjected to Flexure and Axial Load: Tests and Strength Models (CPF Grant #03-11).

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