The Earthquake Engineering Online Archive

Toward an Understanding of the Observed Buckling Modes of Reinforcing Bars in Concrete Columns

Falk, Wayne M.; Govindjee, Sanjay

UCB/SEMM-1999/10, Dept. of Civil and Environmental Engineering, University of California, Berkeley, 1999-09-01, 15 pages (500/C23/1999/10)

The buckling and post-buckling behavior of reinforcing bars in spirally reinforced columns is studied using finite deformation kinematics and a linear elastic constitutive law. Analytical results show the initially straight elastic system to buckle first in a single spacing mode and then make a "snap" transition to a multiple spacing mode similar to that observed in the actual system. The results are verified using a more general elastic finite element solution.

Available online: http://nisee.berkeley.edu/documents/SEMM/SEMM-99-10.pdf (1 MB)