Title:
Numerical Investigation of Eccentrically Loaded
High-Strength Concrete Tied Columns
Author(s):
J. Xie, James G. MacGregor, and A. E. Elwi
Publication:
Structural Journal
Volume:
93
Issue:
4
Appears on pages(s):
449-461
Keywords:
confined concrete; cover; ductility; finite element method; high-strength
concretes; reinforced concrete; strains; tied columns; triaxial stresses.
DOI:
10.14359/9704
Date:
7/1/1996
Abstract:
High-strength concrete tied columns are becoming increasingly popular in engineering practice. Little is known, however about the ductility and post-peak behavior of tied columns with concrete strength higher than 60 MPa. This paper presents a numerical simulation of four high-strength concrete tied columns. The columns, with compressive strengths of 59 to 124 MPa, had rectangular cross sections with various layouts of transverse reinforce-ment. The columns were subjected to eccentric longitudinal loads. The full load-deformation response is verified against the experimental observa-tion. The stress distribution pattern in the tied columns and the stress in the ties are determined numerically. The failure mechanism, involving the strain softening of cover; yielding of the ties, and the formation of a triaxial stress state in column cores, is investigated and studied.