Title:
Postpeak Strain-Stress Relationship for Concrete in Compression
Author(s):
Shane M. Palmquist and Daniel C. Jansen
Publication:
Materials Journal
Volume:
98
Issue:
3
Appears on pages(s):
213-219
Keywords:
compressive strength; ductility; strain
DOI:
10.14359/10275
Date:
5/1/2001
Abstract:
The purpose of this paper is to present a postpeak strain-stress relationship based on strain localization of concrete in compression. This relationship predicts differences in postpeak ductility of specimens with varying height-width ratios. Experimental stress-strain curves from compression tests of mortar, normal- and high-strength concrete, and fiber reinforced concrete available in the literature were used to determine the empirical constants separately for each material. Once the constants are known, the postpeak compressive behavior for any specimen with a known practical height-width ratio greater than or equal to 2 can be determined. Results show that the relationship accurately predicts an increase in postpeak ductility with a decrease in specimen height-width ratio for the mortar and concretes examined herein.