Title: Inelastic Behavior in Tests of Eccentrically Loaded Short Reinforced Concrete Columns

Author(s): Eivind Hognestad

Publication: Journal Proceedings

Volume: 49

Issue: 10

Appears on pages(s): 117-139

Keywords: no keywords

DOI: 10.14359/11808

Date: 10/1/1952

Abstract:
Presents methods and results of an experimental and analytical investigation undertaken to throw new light on the behavior of reinforced concrete members subject to combined bending and axial load. Describes observations of basic behavior of such members and indicates mathematical expressions for ultimate loads. A total of 120 column specimens were tested, of which 90 were 10-in. square tied columns with 1.46 to 4.8 percent reinforcement, and 30 were 12-in. cylin-drical spiral columns with 4.25 percent longitudinal reinforcement. The con-crete quality was varied from 1500 to 5500 psi, and the eccentricity of loading varied from 0 to 1.25 times the lateral dimension of the columns. An inelastic flexural theory was developed, by means of which the behavior of the test columns may be explained, and the measured ultimate loads may be predicted with satisfactory accuracy.