Correlations between the stress paths of a monotonic test and a cyclic test under the same initial conditions. Issue 101 (October 2017)

• Record Type: Journal Article
• Authors: Li, Yao; Yang, Yunming; Yu, Hai-Sui; Roberts, Gethin
• Is Part Of: Soil dynamics and earthquake engineering. Issue 101(2017)
• Page Start: 153
• Page End: 156
• Publication Date: 2017-10
• Subjects: Soil dynamics -- Periodicals; Earthquake engineering -- Periodicals; Sols -- Dynamique -- Périodiques; Génie parasismique -- Périodiques; 624.176205
• DOI: 10.1016/j.soildyn.2017.07.023
• Languages: English
• ISSNs: 0267-7261

Abstract

Abstract: In most experimental studies on liquefaction, cyclic loadings are applied on specimens with various initial conditions. However, few studies compared cyclic test results with monotonic results under the same initial conditions. The relation between monotonic tests and cyclic tests is crucial for understanding liquefaction mechanics and liquefaction resistance. This work compares the stress paths of a monotonic test with those of a cyclic test under the same initial conditions, and concluded that the stress path of monotonic tests envelops the stress path of cyclic tests under the same initial conditions. In addition, a new parameter, Level of Liquefaction Index (LI) is proposed to evaluate the liquefaction resistance of specimens under various initial conditions, and a linear relationship between LI and number of cycles at failure is found. Highlights: ● This note shows the stress path of a monotonic test envelopes that of its corresponding cyclic test. ● A new parameter, Liquefaction index, is proposed for evaluating the liquefaction possibility of solis under complex stress conditions, such as soils with induced anisotropy. ● A linear relationship between Liquefaction index and the number of cycles is found in tests with consolidation shear stresses in different magnitudes and directions.