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A Study on the Behavior of Deep, Slender Wide Flange Steel Beam-Column Members in Seismic Applications

Pettersson, Frida
http://rave.ohiolink.edu/etdc/view?acc_num=ucin1455209092

Abstract Details

2016, MS, University of Cincinnati, Engineering and Applied Science: Civil Engineering.
To economically control the drift limits in special moment frames (SMFs), deeper columns than the traditional W14 sections have become more common. The drift of an SMF can be reduced by increasing the bending and shear stiffness of the columns in the frame, and this would also be accomplished by using deeper sections (Shen 2002). However, deeper columns need to be checked against instability since they are more sensitive to local buckling and weak-axis failure modes than stockier columns (NEHRP 2011). The SAC project investigated the behavior of steel moment resisting frame connections after the Northridge Earthquake and some results were extrapolated to column and beam members. However, the project only produced data that led to the prequalification of RBS connections for use with W12 and W14 columns. When testing was performed with deeper column sections, stability problems occurred (FEMA 2000). This study analytically investigates the behavior of deep columns with an exterior RBS connection in a special moment frame. The 40 assemblies studied were designed according to the AISC Provisions (AISC 341, AISC 358, and AISC 360) and modeled with finite element software. A floor slab was not included and monotonic loading displaced the beam tip by 6.0 in. Column sections investigated were W14x426, W24x192, W27x194, and W30x191. The columns were subjected to varying levels of axial load and had medium or weak panel zone strength. Geometric imperfections were included in all models, and some models also included residual stresses. From this study it was concluded that the column depth does not impact the behavior of the connection and deep columns can be used in SMFs. The results show that axial loads have no effect on the column behavior until very high axial loads are applied. It was also shown the twist of the column increases with increasing column depth. Columns with a doubler plate twist more than cases without a doubler plate and the column twist decreases with an increasing axial load.
Gian Rassati, Ph.D. (Committee Chair)
Thomas M. Burns, Ph.D. (Committee Member)
James Swanson, Ph.D. (Committee Member)
147 p.
Civil Engineering
Deep columns; W-section; SMF; RBS; Axial load; Panel zone strength

Recommended Citations

Citations

  • Pettersson, F. (2016). A Study on the Behavior of Deep, Slender Wide Flange Steel Beam-Column Members in Seismic Applications [Master's thesis, University of Cincinnati]. OhioLINK Electronic Theses and Dissertations Center. http://rave.ohiolink.edu/etdc/view?acc_num=ucin1455209092

    APA Style (7th edition)

  • Pettersson, Frida. A Study on the Behavior of Deep, Slender Wide Flange Steel Beam-Column Members in Seismic Applications. 2016. University of Cincinnati, Master's thesis. OhioLINK Electronic Theses and Dissertations Center, http://rave.ohiolink.edu/etdc/view?acc_num=ucin1455209092.

    MLA Style (8th edition)

  • Pettersson, Frida. "A Study on the Behavior of Deep, Slender Wide Flange Steel Beam-Column Members in Seismic Applications." Master's thesis, University of Cincinnati, 2016. http://rave.ohiolink.edu/etdc/view?acc_num=ucin1455209092

    Chicago Manual of Style (17th edition)

ucin1455209092
568
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This open access ETD is published by University of Cincinnati and OhioLINK.