Senior Research Engineer.
Hysteretic models that incorporate strength and stiffness deterioration
Article first published online: 13 JUN 2005
Copyright © 2005 John Wiley & Sons, Ltd.
Earthquake Engineering & Structural Dynamics
Volume 34, Issue 12, pages 1489–1511, October 2005
How to Cite
Ibarra, L. F., Medina, R. A. and Krawinkler, H. (2005), Hysteretic models that incorporate strength and stiffness deterioration. Earthquake Engng. Struct. Dyn., 34: 1489–1511. doi: 10.1002/eqe.495
- Issue published online: 19 SEP 2005
- Article first published online: 13 JUN 2005
- Manuscript Accepted: 1 MAR 2005
- Manuscript Revised: 12 JAN 2005
- Manuscript Received: 19 JUN 2004
- Pacific Earthquake Engineering Research (PEER) Center
- hysteretic behaviour;
- strength deterioration;
- cyclic deterioration;
This paper presents the description, calibration and application of relatively simple hysteretic models that include strength and stiffness deterioration properties, features that are critical for demand predictions as a structural system approaches collapse. Three of the basic hysteretic models used in seismic demand evaluation are modified to include deterioration properties: bilinear, peak-oriented, and pinching. The modified models include most of the sources of deterioration: i.e. various modes of cyclic deterioration and softening of the post-yielding stiffness, and also account for a residual strength after deterioration. The models incorporate an energy-based deterioration parameter that controls four cyclic deterioration modes: basic strength, post-capping strength, unloading stiffness, and accelerated reloading stiffness deterioration. Calibration of the hysteretic models on steel, plywood, and reinforced-concrete components demonstrates that the proposed models are capable of simulating the main characteristics that influence deterioration. An application of a peak-oriented deterioration model in the seismic evaluation of single-degree-of-freedom (SDOF) systems is illustrated. The advantages of using deteriorating hysteretic models for obtaining the response of highly inelastic systems are discussed. Copyright © 2005 John Wiley & Sons, Ltd.