Title:
Behavior of Interior Narrow and Wide Beams
Author(s):
Egor P. Popov, Julie Mark Cohen, Kosonike Koso-Thomas, and Kazuhiko Kasai
Publication:
Structural Journal
Volume:
89
Issue:
6
Appears on pages(s):
607-616
Keywords:
beam-column frame; beams (supports); columns (supports); bond (concrete to reinforcement); cyclic behavior; framiing systems; earthquake-resistant structures; hysteresis; interstory drift; joints (junctions); reinforced concrete; seismic design; servicea
DOI:
10.14359/4131
Date:
11/1/1992
Abstract:
Narrow as well as wide beams are used in moment-resisting reinforced concrete frames in seismic zones; typically the longitudinal beam bars in such frames are placed inside the column. Experimental investigations into the behavior of reinforced concrete beam-column slab cruciform interior joint subassemblages under simulated seismic loadings are described in this paper. The subassemblages studied include narrow and wide beams with some of the top longitudinal reinforcing bars placed outside the columns. This detailing is not permitted in U.S. seismic codes. However, test assessment indicates that placement of some of the longitudinal bars outside of the columns is permissible, leading to lesser congestion of reinforcement.