Constitutive Modelling of Joints under Cyclic Loading. Part 1. Modelling and Testing of Idealized Rock Joints
Abstract
A rather novel plasticity based constitutive model to describe the response of simulated (rock) joints under cyclic, quasi-static and static shear is developed. Development of the constitutive model includes both mathematical formalization based on the hierarchical approach and laboratory testing. The mathematical formulation is basic and general and is capable of predicting observed behavior of joints. Laboratory test results are used to determine parameters for the model and to compare with model predictions. The constitutive model is based on the theory of incremental plasticity. A generalized three- dimensional plasticity model capable of predicting the behavior of geologic solid material such as soil and rock is specialized to describe the behavior of individual rock joints. The model allows for effects of initial normal stress, states of shear and normal stress, plastic hardening, nonassociativeness, volume changes at joints, and cycles of loading, unloading and reverse loading. The test program was conducted on simulated joints. The simulated specimens were cast in concrete with a variety of surface geometries (angles of asperities). Specimens were subjected to a series of quasistatic and fast cyclic direct shear tests. Keywords: Shear loading; Reverse loading; Unloading; Engineering geology; Rock mechanics; Soil mechanics; Cyclic loading; Rock joints; Dynamic loads.
Document Details
- Document Type
- Technical Report
- Publication Date
- Jul 31, 1988
- Accession Number
- ADA200232
Entities
People
- C. S. Desai
- D. Rigdy
- K. L. Fishman
- T. Kundu
- Yong Ma
Organizations
- University of Arizona