期刊
TRANSPORTATION GEOTECHNICS
卷 32, 期 -, 页码 -出版社
ELSEVIER
DOI: 10.1016/j.trgeo.2021.100683
关键词
Sand; Normal compression line; Undrained shear behaviour; Characteristic state line; Initial state
资金
- National Key Research and Devel-opment Program of China [2018YFE0207100]
- National Natural Science Foundation of China [51979001]
- Na-tional Basic Research Program of China [2014CB047006]
A new line, called the normal compression line (NCL), is introduced to characterize the initial state of sand in the e-lnp plane. Four characteristic zones, including the liquefaction zone, strain softening zone, quasi-steady state zone, and strain hardening zone, are established based on the existing state lines. Experimental results show that the proposed zones effectively capture the initial state of sand.
A new line for characterising the initial state of sand in the e-lnp plane is firstly introduced in this note, which is defined as the normal compression line (NCL) for sand. Together with a series of existing characteristic state lines, four characteristic zones are subsequently established in the e-lnp plane, namely, liquefaction zone; strain softening zone; quasi-steady state zone and strain hardening zone. Under undrained shearing, saturated sands with the initial state located at the same zone can exhibit similar type of stress-strain relation denoted by the name of zone. A good agreement has been found between the proposed zones and existing experimental results, revealing the ability of proposed zones in characterising the initial state of sand. Finally, the significance of the proposed characteristic zones is demonstrated in the applications associated with sand.
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