Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
4927338 | Soil Dynamics and Earthquake Engineering | 2017 | 11 Pages |
Abstract
This paper aims to investigate the seismic dynamic responses of soil-rock mixtures (SRM) at medium loading strain rates. A total of 130 SRM specimens with four rock block percentage (RBP) of 20%, 30%, 40% and 50% were produced to conduct the uniaxial compressive strength test, at strain rates of 1Ã10â5Â sâ1, 5Ã10â4Â sâ1, 1Ã10â3Â sâ1, 5Ã10â3Â sâ1, and 1Ã10â2Â sâ1. From the experimental results, SRM presents particular rate-dependence characteristics that are different from each soil and rock material, the peak stress and peak strain first increase and then decrease with the increase of strain rate. The inflection points of rate-dependence are different for specimens with different RBP. The rate-dependence characteristic of SRM is strongly influenced by the rock blocks in the SRM specimen. In addition, crack initiation stress level Ïci/Ïf and crack damage stress level Ïcd/Ïf do not change with the increases of strain rate. What is more, the experimental results also show that the failure pattern of SRM performs as a spitting failure, shear failure, and conical failure at various strain rates. All the test results proved the particular seismic dynamic responses of SRM, and the interactions between the rock blocks and the soil matrix are the primary factor determining the dynamic response.
Related Topics
Physical Sciences and Engineering
Earth and Planetary Sciences
Geotechnical Engineering and Engineering Geology
Authors
Y. Wang, X. Li, B. Zheng,