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Title: Gravity Load Effect on Seismic Behavior of Exterior Slab-Column Connections

Author(s): Ian N. Robertson and Ahmad J. Durrani

Publication: Structural Journal

Volume: 88

Issue: 3

Appears on pages(s): 255-267

Keywords: columns (supports); concrete slabs; connections; cyclic loads; ductility; earthquake-resistant structures; flexural strength; stiffness; lateral pressure; punching shear; reinforced concrete; shear strength; structural design; Design

DOI: 10.14359/3090

Date: 5/1/1991

Abstract:
The effect of superimposed slab loading on the behavior of exterior slab-column connections was studied by testing two-bay slab-column subassemblies. Each subassembly consisted of one interior and two exterior connections. Three identical slab-column subassemblies were subjected to the same cyclic lateral-displacement history, while each supported a different superimposed slab load. The tests show that increasing slab load substantially reduces the lateral drift capacity of the connections. A limiting shear stress is suggested to insure adequate drift capacity for xterior slab-column connections. A rational method to calculate the moment capacity of exterior connections is developed. The test results are compared with present ACI 318-83 Building Code provisions and ACI Committee 352's recommendations for design of slab-column connections.


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