NEHRP Clearinghouse

Title
Effects of Transverse Reinforcement on Seismic Performance of Columns: A Partial Parametric Investigation.
File
PB89148068.pdf
Author(s)
Azizinamini, A.; Johal, L. S.; Hanson, N. W.; Musser, D. W.; Corley, W. G.
Source
National Science Foundation, Washington, DC. Directorate for Engineering., September 1988, 403 p.
Abstract
Twelve full-scale square and circular test columns, which represented a portion of a frame subjected to simulated seismic loading, were tested. Controlled test variables included the level of axial load, the amount and type of transverse reinforcement, and details of transverse reinforcement. The columns were subjected to constant axial load and slow moment reversals at increasing inelastic deformations. Several new types of lateral reinforcement detail were identified and tested. Test results indicate that for columns with area of provided lateral reinforcement equal to ACI-318-83 requirements, the resulting available displacement ductility ratios should exceed those generally implied by codes. Test results indicate that the current requirements of ACI-318-83 regarding details of transverse reinforcement including hook bends and hook extensions can be further simplified.
Keywords
; Dynamic response; Ductility; Earthquake resistant structures; Reinforcement (Structures); Loads (Forces); Axial strain; Graphs (Charts); Mechanical properties; Columns (Supports); Seismic prospecting; Dynamic structural analysis