Title:
Evaluation of Seismic Damage Indices for Concrete Elements Loaded in Combined Shear and Flexure
Author(s):
Martin S. Williams, Isabelle Villemure, and Robert G. Sexsmith
Publication:
Structural Journal
Volume:
94
Issue:
3
Appears on pages(s):
315-322
Keywords:
damage index; ductility; hysteresis; reinforced concrete;
seismic behavior;
DOI:
10.14359/483
Date:
5/1/1997
Abstract:
Damage indices have the potential to play a vital role in retrofit decisionmaking and disaster planning in earthquake regions. However, a major limitation of existing indices is that they have been formulated and validated almost exclusively on the basis of flexural response, neglecting the importance of shear as a cause of seismic damage. In this paper, eight damage indices are evaluated by comparison with a series of singlecomponent tests using a variety of moment to shear ratios and stirrup spacings. On the basis of these comparisons, it appears that the more sophisticated indices which attempt to take account of the damage caused by repeated cycling give no more reliable an indication of damage than simple measures such as ductility and stiffness degradation.