Role of Spandrel Beams on Response of Slab-Beam-Column Connections
Publication: Journal of Structural Engineering
Volume 121, Issue 3
Abstract
Full-scale exterior beam-column-slab subassemblages were tested under reversed cyclic loading to investigate the role of the spandrel beam in the overall response. Results from specimens having different spandrel beam sizes and different amounts of torsional reinforcement in the spandrel beams provided a better understanding of their behavior. Detailed strain measurements together with the crack patterns indicate that the effective width of the slab contributing to the negative bending of the main beam is affected by the torsional yielding of the spandrel beam. However, after this yielding, a different force mechanism, involving concrete compressive struts and tension ties in the slab and spandrel beam bars, provides means of transferring additional forces from the slab bars to the joint region. It is important to consider the effect of these forces, since they increase the negative moment capacity of the beams, and, hence, they may affect the hierarchy of yielding between the columns and the beams. Design proposals, accounting for the flow of forces through the spandrel beam, are presented and illustrated by a number of examples.
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Information & Authors
Information
Published In
Journal of Structural Engineering
Volume 121 • Issue 3 • March 1995
Pages: 408 - 419
Copyright
Copyright © 1995 American Society of Civil Engineers.
History
Published online: Mar 1, 1995
Published in print: Mar 1995
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