Journal
JOURNAL OF EARTHQUAKE ENGINEERING
Volume 23, Issue 8, Pages 1407-1440Publisher
TAYLOR & FRANCIS LTD
DOI: 10.1080/13632469.2017.1387200
Keywords
Small Strain Modulus; Shear Modulus Reduction; Damping Ratio; Sand-Gravel Mixtures; Consolidation Condition; Particle Characteristics
Funding
- National Key Basic Research Program of China [2014CB047005]
- Project of the National Natural Science Foundation of China [41172258, 51438004]
- National Science and Technology Major Project of China [2013ZX06002001-9]
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A total of 153 cyclic triaxial tests were performed on 19 sand-gravel mixtures over the strain range of 10(-5)-10(-2), which shows that the particle characteristics have significant influence on the small-strain shear-modulus G(0), shear modulus reduction G/G(0,) and damping ratio lambda. An improved Hardin's equation for the G(0) was proposed to consider the effects of particle characteristics and consolidation state. Furthermore, the KZM model correlation was improved to characterize the G/G(0) curve. A four-parameter equation of lambda with parent rock type, particle gradation, and consolidation condition was also introduced to characterize the lambda curve.
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