Title:
Pivot Hysteresis Model for Reinforced Concrete Members
Author(s):
Robert K. Dowell, Frieder Seible, and Edward L. Wilson
Publication:
Structural Journal
Volume:
95
Issue:
5
Appears on pages(s):
607-617
Keywords:
bridges; damping; ductility; dynamic; hysteresis; nonlinear; practical
design; reinforced concrete;
DOI:
10.14359/575
Date:
9/1/1998
Abstract:
For nonlinear dynamic seismic analysis of bridge structures to be practical, only the dominant nonlinear characteristics of the structure should be included. Based on capacity design principles, the current seismic bridge design philosophy is generally to force all member nonlinearities into the ends of ductile columns. Therefore, nonlinear characteristics of the columns must be adequately defined. In this paper, a hysteresis model is presented which accurately captures the nonlinear behavior of reinforced concrete members in terms of a force-displacement, or moment-rotation, response. What makes this model attractive, when compared to other hysteresis models, is that unsymmetric sections (non-symmetric cross-section geometry and/or tension reinforcement amounts in the two loading directions), a cyclic axial load, and strength degradation may be included. The model is based on a few simple rules. Results based on the proposed hysteresis model show close agreement with various experiments on reinforced concrete members.