Behavior of high-strength concrete in biaxial compression

Thesis/Dissertation · Sun Jan 01 04:00:00 EST 1984

OSTI ID:6464748

Chen, R L

Numerous experimental studies on the biaxial behavior of normal strength concrete have been conducted, but no data are available for the behavior of high strength concrete under biaxial state of stress. The behavior of high strength concrete under both uniaxial and biaxial states of stress using thin square plate specimens was studied here. Both model concrete specimens and real concrete specimens were included. Strength, stress-strain characteristics, mode of failure, and failure mechanism are discussed. Results confirm that a main cause of the increase in strength, stiffness, and the proportional limit of concrete under biaxial compression is the confinement of internal microcracking that prevents the development of a progressive failure mechanism. Both the proportional limit and the discontinuity point occur at a higher stress-strength ratio for high-strength concrete than for normal strength concrete. As the aggregate stiffness approaches the mortar stiffness, the values of both the proportional limit and discontinuity point 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.

• Research Organization: Texas Univ., Austin (USA)
• OSTI ID: 6464748
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
360603* -- Materials-- Properties
BUILDING MATERIALS
COMPRESSION STRENGTH
CONCRETES
FAILURES
MATERIALS
MECHANICAL PROPERTIES
STRAINS
STRESSES
TENSILE PROPERTIES