Location
St. Louis, Missouri
Presentation Date
27 Apr 1981, 2:00 pm - 5:00 pm
Abstract
A better understanding of soil/rock-structure interaction is invaluable in the seismic design of concrete and masonry structures. In an effort to understand the behavior of rock under cyclic compression, both intact and faulted specimens of Westerly granite (2.5 cm. dia. x 6.25 cm. long) were subjected to uniaxial and triaxial loading at a uniform rate of one cycle per second. The fatigue strength under uniaxial loading at 106 cycles was found to be about 70% of the static compressive strength, and confining pressure improved fatigue resistance considerably. The accumulated permanent strain at the maximum stress level was found to be independent of the stress path and bounded by the complete stress-strain curve. cyclic loading produces dilatancy and the stress at the onset of dilatancy is significantly reduced by repeated cycling. In faulted specimens (saw cut at 30 degrees to the longitudinal axis), the first loading cycle produces a large amount of sliding; subsequent cycles result in a decelerating rate of increase in the amount of sliding, with a steady-state equilibrium being reached in a few cycles. Cyclic loading increases crack porosity, and progressive microcracking causes fatigue failure.
Department(s)
Civil, Architectural and Environmental Engineering
Meeting Name
1st International Conference on Recent Advances in Geotechnical Earthquake Engineering and Soil Dynamics
Publisher
University of Missouri--Rolla
Document Version
Final Version
Rights
© 1981 University of Missouri--Rolla, All rights reserved.
Creative Commons Licensing
This work is licensed under a Creative Commons Attribution-Noncommercial-No Derivative Works 4.0 License.
Document Type
Article - Conference proceedings
File Type
text
Language
English
Recommended Citation
Rajaram, V., "Mechanical Behavior of Granite Under Cyclic Compression" (1981). International Conferences on Recent Advances in Geotechnical Earthquake Engineering and Soil Dynamics. 11.
https://scholarsmine.mst.edu/icrageesd/01icrageesd/session01b/11
Included in
Mechanical Behavior of Granite Under Cyclic Compression
St. Louis, Missouri
A better understanding of soil/rock-structure interaction is invaluable in the seismic design of concrete and masonry structures. In an effort to understand the behavior of rock under cyclic compression, both intact and faulted specimens of Westerly granite (2.5 cm. dia. x 6.25 cm. long) were subjected to uniaxial and triaxial loading at a uniform rate of one cycle per second. The fatigue strength under uniaxial loading at 106 cycles was found to be about 70% of the static compressive strength, and confining pressure improved fatigue resistance considerably. The accumulated permanent strain at the maximum stress level was found to be independent of the stress path and bounded by the complete stress-strain curve. cyclic loading produces dilatancy and the stress at the onset of dilatancy is significantly reduced by repeated cycling. In faulted specimens (saw cut at 30 degrees to the longitudinal axis), the first loading cycle produces a large amount of sliding; subsequent cycles result in a decelerating rate of increase in the amount of sliding, with a steady-state equilibrium being reached in a few cycles. Cyclic loading increases crack porosity, and progressive microcracking causes fatigue failure.
