The Effects of High Strain Rate and High Frequency Loading on Soil Behavior in Centrifuge Model Tests
Abstract
A review of available data regarding the influence of time effects on the stress-strain behavior of soils is presented. During simulated earthquake loading, centrifuge models are expected to deform at strain rates on the order of 100 to 1000% per second, and at frequencies between 20 Hz and 1000 Hz. Since these strain rates and frequencies are outside the realm of conventional laboratory tests, it is difficult to accurately determine the strain rate effects during dynamic centrifuge tests. To supplement laboratory test data, data from centrifuge tests employing modeling of models are also cited. It is found that strain rate and high frequency effects are small for sands. For clays there is a significant trend of increasing strength and stiffness as the rate increases. Sample nonuniformity is a serious problem for tests conducted at very high frequencies and high strain rates. Some data show that the strain rate effect becomes more important at about 100% per second. This increase of rate effects may be related to errors associated with sample uniformity. Review of centrifuge tests results did not indicate that strain and high frequency effects were a serious problem. Keywords: Geotechnical centrifuge, Soil dynamics; Soil constitutive models; Soil mechanics models.
Document Details
- Document Type
- Technical Report
- Publication Date
- Jul 01, 1989
- Accession Number
- ADA212089
Entities
People
- B. L. Kutter
- N. Sathialingam
Organizations
- University of California