Title:
Effects of Shape, Size, and Casting Direction of Specimens on Stress-Strain Curves of High-Strength Concrete
Author(s):
M. S. Chin, M. A. Mansur, and T. H. Wee
Publication:
Materials Journal
Volume:
94
Issue:
3
Appears on pages(s):
209-219
Keywords:
casting direction; high-strength concrete; size; specimen shape;
stress-strain curves; structural design; tests;
DOI:
10.14359/301
Date:
5/1/1997
Abstract:
An experimental investigation conducted to study the effects of the shape, size, and casting direction of specimens on the complete stress-strain relationship of high-strength concrete in compression is reported in this paper. Both cylindrical and prismatic specimens were used for this purpose, and the concrete grade was varied from 50 to 120 MPa. Test results reveal that the effect of specimen size vanishes below a certain size and that the effects of the shape and casting direction of specimens are significant, particularly for the descending branch of the stress-strain curve. Based on test data, a simple model is proposed to generate the complete stress-strain relationship of high-strength concrete in compression that is applicable to horizontally cast prisms. The proposed model has been found to give a good representation of the actual stress-strain response, and a comparison with a similar model proposed earlier for cylindrical specimens shows that the horizontally cast prisms are more ductile than corresponding cylinders.