岩土工程学报2026，Vol.48Issue(z2)：74-78,5.DOI:10.11779/CJGE2026S20002
循环主应力方向对饱和珊瑚砂液化特性影响试验研究
Experimental study on influence of cyclic principal stress direction on liquefaction characteristics of saturated coral sand
摘要
Abstract
To investigate the effect of the cyclic principal stress direction angle on the dynamic liquefaction characteristics of saturated coral sand,a series of undrained cyclic shear tests with 90-degree abrupt rotation of the principal stress direction are carried out using a hollow cylinder torsion shear apparatus.The test results indicate the following:The deformation behavior of the samples at liquefaction failure exhibits cyclic mobility.The contribution of each strain component to the generalized shear strain is not equal under different cyclic principal stress directions,with axial strain being predominant.Taking the principal stress direction angle α=45° as the boundary,when α<45°,the liquefaction resistance of coral sand samples is inversely proportional to α.When α>45°,the greater the α,the less likely the sample is to liquefy.The normalized relationship between the generalized shear strain amplitude and the excess pore water pressure ratio is independent of the principle direction angle,relative density and cyclic stress ratio exhibiting uniqueness.关键词
饱和珊瑚砂/循环主应力方向/广义剪应变/超静孔压/抗液化能力Key words
saturated coral sand/cyclic principal stress direction/generalized shear strain/excess pore water pressure/liquefaction resistance分类
建筑与水利引用本文复制引用
周宗飞,潘志斌,夏邦昱,黄群浩,汪宏,包伟鹏,陈军,潘晓东..循环主应力方向对饱和珊瑚砂液化特性影响试验研究[J].岩土工程学报,2026,48(z2):74-78,5.基金项目
国家自然科学基金项目(52378377) （52378377）
浙江省建设科研项目(2023K151) （2023K151）
