Blind Prediction of Cyclic Response of Deep Wide-Flange Columns for Special Moment Frame Applications [V1]

Deep wide-flange columns are frequently used in the seismic design of steel Special Moment Frame (SMF) because the large moment of inertia for strong-axis bending is very effective in meeting the code-specified drift limit. But current knowledge of these members under axial compression and cyclic lateral drifts lags behind that of shallow (e.g. W14) columns. A long-range experimental and analytical research project funded by the National Institute of Standards and Technology (NIST) and managed by the Applied Technology Council (ATC) addresses deep column design and modeling issues. Dr. Chia-Ming Uang at the University of California, San Diego (UCSD) was contracted by ATC to provide the testing services. The ATC-106 and ATC-106-1 projects, with Mr. James O. Malley chairing the Project Technical Committee, include cyclic testing of more than forty full-scale columns in the W18 to W30 range with varying slenderness ratios, boundary conditions, and axial load demand at UCSD, and the research results are expected to impact future editions of the AISC Seismic Provisions. This project also carried out a parallel blind prediction contest to advance knowledge on design and modelling of deep wide-flange columns. Top contest participants will discuss the modeling techniques used, challenges involved, quality assurance techniques used and engineering decisions made. The session will conclude with a panel discussion on the design and modeling of deep columns in steel SMF.

Intended Audience: Engineers
Track: Seismic

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