Title:
Seismic Resistance of Frames with Vertically Distributed Longitudinal Reinforcement in Beams
Author(s):
Philip K. C. Wong, M. J. N. Priestley and R. Park
Publication:
Structural Journal
Volume:
87
Issue:
4
Appears on pages(s):
488-498
Keywords:
beams (supports); columns (supports); deformation; failure; earthquake-resistant structures; flexural strength; frames; shear strength; tests; joints (junctions); reinforcing steels; structural design; Design
DOI:
10.14359/3110
Date:
7/1/1990
Abstract:
The use of vertically distributed longitudinal reinforcement in the beams of moment-resisting frames designed for earthquake resistance is considered. In terms of flexural strength, it is demonstrated that beam sections with vertically distributed longitudinal reinforcement are as efficient as conventional beams with longitudinal reinforcement concentrated near the top and bottom of the section. The effect of vertically distributed beam reinforcement on the shear forces induced in beam-column joint cores is also considered. Experimental results from two near full-scale beam-column joint assemblages with vertically distributed longitudinal beam reinforcement, tested under simulated seismic loading, are presented. These joint assemblages contained very little joint core reinforcement. Although the results indicated that vertically distributed longitudinal beam reinforcement could not be used as a complete replacement for horizontal joint core reinforcement, it is clear that partial replacement by such reinforcement is possible.