岩土工程学报2026，Vol.48Issue(z2)：90-94,5.DOI:10.11779/CJGE2026S20031
小应变至中应变条件下舟山黏土的动力剪切特性
Dynamic shear characteristics of Zhoushan clay under small-to-medium strain levels
摘要
Abstract
Foundation soils of offshore-island transportation infrastructures are continuously subjected to various dynamic loads.The dynamic shear characteristics of the foundation soil under the small-to-medium strain range are important to the evaluation of the infrastructure serviceability.A series of resonant column tests are conducted on clay samples taken from a land reclamation site in the Zhoushan sea area,to investigate the effects of soil state and shear strain amplitude on the shear modulus.The test results indicate that the small-strain shear modulus is positively correlated with effective stress and negatively correlated with void ratio.As the shear strain enters the medium-strain range,the shear modulus gradually reduces with increasing strain amplitude in a nonlinear trend.The effective stress level has certain impacts on the strain-dependent shear modulus degradation,but the void ratio does not affect the pattern.Based on the test results,empirical formulas are proposed to characterize the small-strain shear modulus and the strain-dependent behavior of shear modulus.The experimental data from this study not only enrich the database for the dynamic properties of clay but also provide a basis for the serviceability evaluation of offshore-island transportation infrastructure in the Zhoushan sea area.关键词
剪切模量/黏土/共振柱/动力剪切特性/小应变/模量衰减Key words
shear modulus/clay/resonant column/dynamic shearing characteristics/small strain/modulus degradation分类
建筑与水利引用本文复制引用
於诗萌,魏骁,杨仲轩..小应变至中应变条件下舟山黏土的动力剪切特性[J].岩土工程学报,2026,48(z2):90-94,5.基金项目
国家重点研发计划项目(2023YFB2604200) （2023YFB2604200）
国家自然科学基金项目(52578438) （52578438）
