The Earthquake Engineering Online Archive

A simple model for reinforcing bar anchorages under cyclic excitations

Filippou, Filip C.

UCB/EERC-85/05, Earthquake Engineering Research Center, University of California, Berkeley, 1985-03, 61 pages (530/F55/1985)

A simple and computationally efficient model of the hysteretic response of reinforcing bar anchorages subjected to severe cyclic excitations is presented. The model is based on a piecewise linear approximation of the bond stress distribution function along the bar anchorage length. Only three intermediate points located between the ends of the bar are needed to yield results matching the finite element solution of the problem. The bond stress value at these intermediate points is established by iteratively satisfying the equilibrium and compatibility equations of the bond problem. The proposed model is used to calculate (1) the response of the bottom reinforcing bars of an interior beam-column joint subjected to deformation reversals of increasing magnitude and (2) the response of a single reinforcing bar subjected to cyclic push-pull. Results are compared with the finite element solution of the studied cases.

Available online: http://nisee.berkeley.edu/documents/EERC/EERC-85-05.pdf (2 MB)