Open AccessRelationship between pore water pressure and dissipated energy of fiber-reinforced sand
Author(s) -
Mingming Liu,
Yingjie Chen,
Jinli Zhang,
Jia Liu,
Zhiyong Yang
Publication year - 2021
Publication title -
iop conference series. earth and environmental science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.179
H-Index - 26
eISSN - 1755-1307
pISSN - 1755-1315
DOI - 10.1088/1755-1315/768/1/012105
Subject(s) - liquefaction , pore water pressure , dissipation , geotechnical engineering , fiber , materials science , relative density , stage (stratigraphy) , environmental science , composite material , geology , microstructure , paleontology , physics , thermodynamics
Under the loading of earthquake, sandy soil is prone to liquefaction and resulting in the superstructure damage. Therefore, the liquefaction identification of sandy soil is the primary task of liquefaction disaster prevention. Based on the energy dissipation method, the relationship between pore water pressure (u) and dissipated energy density ( W ) of fiber-reinforced sand (FRS) is established, and the effects of fiber length ( FL ), fiber content ( FC ), cyclic stress ratio ( CSR ), and relative density ( Dr ) on the accumulation of u are analyzed. The results showed that fiber addition can effectively slow down the liquefaction of FRS, and the curve of u and W can be divided into rapid growth stage, stable ascend stage and slow growth stage. When the u keep constant, the W increases with the increasing of FL and FC . Whereas, the u decreases with the increasing of FL and FC when the W keep constant. The u and W are less affect by CSR , and the dense sand of FRS is less prone to liquefaction than loose sand.