American Society of Civil Engineers


Flexural Behavior of Concentrically-Braced Frame Beam-Column Connections


by Christopher D. Stoakes, (Graduate Research Assistant, Civil and Environmental Engineering, University of Illinois at Urbana-Champaign; E-mail: stoakes2@illinois.edu) and Larry A. Fahnestock, (Assistant Professor, Civil and Environmental Engineering, University of Illinois at Urbana-Champaign; E-mail: fhnstck@illinois.edu)
Section: Buildings—Seismic, pp. 1350-1360, (doi:  http://dx.doi.org/10.1061/41130(369)123)

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Document type: Conference Proceeding Paper
Part of: Structures Congress 2010
Abstract: Recent research has demonstrated the importance of reserve capacity for collapse prevention of low-ductility steel concentrically-braced frames (CBFs) commonly used in moderate seismic regions. The beam-column connections within CBFs may be a viable means of providing this reserve capacity, but the cyclic flexural response of these connections is largely unstudied. This research investigates cyclic flexural behavior and performance of various beam-column connection configurations for use in CBFs. A typical connection using double angles provides the baseline and alternate details using end plates, thicker double angles, and supplementary seat angles are studied using full-scale tests. The local behavior of the connection region is characterized by observations related to beam-gusset plate weld failure and principal strain distribution in the gusset plate and beam web.


ASCE Subject Headings:
Flexural strength
Frames
Bracing
Columns
Beams
Connections