The Earthquake Engineering Online Archive

Nonlinear analysis of reinforced concrete frames under cyclic load reversals

Filippou, Filip C.; Issa, Ahmad M.

UCB/EERC-88/12, Earthquake Engineering Research Center, University of California, Berkeley, 1988-09-01, 120 pages (530/F55/1988)

This report develops improved analytical methods for predicting the nonlinear static response of multistory frames. A new approach is presented to describe the nonlinear hysteretic behavior of reinforced concrete frame elements. The basic mechanisms controlling the hysteretic behavior of girders and columns are isolated into individual subelements that are connected in series to form the girder or column superelement. Two particular subelement models are developed. One describes the inelastic behavior along the girder accounting for the gradual spread of inelastic deformations at the girder ends, while the other models the fixed-end rotations that arise at the beam-column interface due to bond deterioration and slippage of reinforcing bars in the beam-column joint region. To establish the validity of the proposed models, correlation studies are made, comparing analytical predictions and experimental evidence of the load-displacement response of beam-column subassemblages under static load reversals. The predictions of the proposed models are also compared with those of the widely used one-component model.

Available online: http://nisee.berkeley.edu/documents/EERC/EERC-88-12.pdf (11 MB)