Citation

Sasani M. ACI Struct. J. 2007; 104(1): 30-38.

Copyright

(Copyright © 2007, American Concrete Institute)

DOI

unavailable

PMID

unavailable

Abstract

In seismic assessment of existing reinforced concrete (RC) structures, it is important to reliably predict potential column shear failure. Shear strength and deformation capacities can be used to evaluate this failure. This paper evaluates the reliability of three available strength models for estimating the shear strength of RC columns using existing experimental test results. Deformation capacity models are developed for life-safety and near-collapse performance levels. The models account for the difference between the deformation of double-curvature and double-ended columns, in which damage can concentrate on one end of the specimen, and that of cantilever columns. The models include the effects of the transverse reinforcement, axial load, and the aspect ratio of columns on their deformation capacities. Using shear force transfer mechanics, a shear strength capacity model is also developed for RC columns that can estimate column shear strength significantly better than the currently available models. In addition to the section and material characteristics, the shear strength capacity model accounts for the effects of the aspect ratio, compressive load, and displacement ductility on the column strength.