Title:
Behavior of High-Strength Concrete Under Uniaxial and Biaxial Compression
Author(s):
Robert C. Chen, Ramon L. Carrasquillo, and David W. Fowler
Publication:
Symposium Paper
Volume:
87
Issue:
Appears on pages(s):
251-274
Keywords:
compression tests; failure mechanisms; high-strength
concretes; models; strength; stress-strain relationships; tensile
stress.
DOI:
10.14359/6533
Date:
9/1/1985
Abstract:
Experimental investigations on the behavior of high strength concrete under uniaxial and biaxial short-term compressive stresses were conducted using thin square plate specimens. Strength, stress-strain relationship, mode of failure, and failure mechanism are discussed. Results confirm that a main cause of the increase in strength, stiffness, and proportional limit of concrete under biaxial compression is the confinement of internal microcracking preventing the development of a progressive failure mechanism. In addition, it was found that as the aggregate stiffness approaches that of the mortar, both the proportional limit and the discontinuity point of the concrete increase due to the reduction of stress concentrations. The observed failure mode for high strength concrete can be explained in terms of the limiting tensile strain criterion.