Journal
JOURNAL OF EARTHQUAKE ENGINEERING
Volume 26, Issue 8, Pages 4302-4324Publisher
TAYLOR & FRANCIS LTD
DOI: 10.1080/13632469.2020.1826373
Keywords
Centrifuge shaking table test; seismic histories; liquefaction resistance; sand fabric anisotropy; mesoscopic mechanism
Funding
- Program of Shanghai Academic/Technology Research Leader [17XD1403700]
- National Natural Science Foundation of China [41977225]
- State Key Laboratory of Geo-Hazard Prevention and Geo-Environment Protection [SKLGP2016K019]
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Centrifuge shaking table tests were conducted to reveal the intrinsic mechanisms of the effects caused by complicated seismic histories on the liquefaction resistance of a saturated sand deposit. Experimental results demonstrated that seismic histories had positive or negative effects on sand liquefaction resistance though sand was densified after previous shakings; these effects were well indicated by the changes in anisotropy characteristics of sand fabric caused by the previous shakings.
Centrifuge shaking table tests were conducted to reveal the intrinsic mechanisms of the effects caused by complicated seismic histories on the liquefaction resistance of a saturated sand deposit. The centrifuge model was shaken by a well-designed seismic sequence including 16 shakings in a certain order. Macroscopic and mesoscopic dynamic responses of the sand deposit were measured and analyzed. Experimental results demonstrated that seismic histories had positive or negative effects on sand liquefaction resistance though sand was densified after previous shakings; these effects were well indicated by the changes in anisotropy characteristics of sand fabric caused by the previous shakings.
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