一个粗粒土的非线性弹性模型  

Nonlinear elastic model for coarse-grained soils

作　　者：史江伟[1,2] 朱俊高[1,2] 王平[3] 张丹[3] 

机构地区：[1]河海大学岩土力学与堤坝工程教育部重点实验室,江苏南京210098 [2]河海大学岩土工程科学研究所,江苏南京210098 [3]中国水电顾问集团成都勘测设计研究院坝工处,四川成都610072

出　　处：《河海大学学报（自然科学版）》2011年第2期154-160,共7页Journal of Hohai University(Natural Sciences)

基　　金：水利部公益性行业科研专项(200801133);国家自然科学基金(50809023)

摘　　要：对大量的粗粒土三轴固结排水剪试验结果进行了分析,发现粗粒土的εa/(σ1-σ3)~εa,-rε/εa^-rε之间线性关系不是很好,尤其是-rε/εa^-rε的关系.进一步分析这些粗粒土试验资料后发现,分别采用双曲对数函数及抛物线函数可以很好地描述(σ1-3σ)~aε及-rε~εa之间的关系,并在此基础上建立了HLP非线性E-ν模型.采用宜兴坝堆石料、长河坝覆盖层料、双江口砾石料等的三轴固结排水剪试验结果对HLP非线性E-ν模型进行了验证,结果表明,ELP非线性E-ν模型能较好地反映粗粒土的应力应变关系.By analyzing the results of various triaxial consolidated-drained shear tests on coarse-grained soils,it was found that the linear relationships of εa/（σ1-σ3）～εa and-εr/εa～-εr were not satisfactory,especially the relationship of-εr/εa～-εr.However,the relationships of（σ1-σ3）～εa and-εr～εa could be reasonably described by the hyperbolic-logarithmic function and the parabolic function,respectively.On such a basis,a HLP nonlinear E-ν model was proposed.It was preliminarily validated by means of the results of triaxial consolidated-drained shear tests on Yixing rock-fill materials,Changheba overburden layers and Shuangjiangkou soils.The results show that the proposed model can satisfactorily depict the stress-strain relationship of coarse grained soils.

关 键 词：粗粒土 三轴固结排水剪试验 应力应变关系 HLP非线性E-v模型 

分 类 号：TU411.3[建筑科学—岩土工程]