Axial stress-strain curves from tri-axial compression tests on concrete cylinders (1)
Richart, 19282
History
1) F.E. Richart, A
Brandtzaeg, and R.L. Brown, A Study of the Failure of Concrete Under
Combined Compressive Stresses, University of Illinois Engineering
Experimental Station, Bulletin No.185, 1928, 104 pp.
2) For each curve the fluid
pressure was held constant while the axial compressive stress was increased
to failure and the axial strains measured.The tests were carried out over short-term periods.It is evident that an increase in
lateral pressure brings very significant increase in the ductility as well as
strength. This effect is due to the lateral pressure that confines the
concrete and receives the tendency for internal cracking and volume increase
just prior to failure.