Experimental Study of Stress-stain Relationships of Frozen Sand

2018 International Conference on Civil, Architecture and Disaster Prevention

土木建筑工程

He, Junlin^1^2 ; Yao, Lan^1^2 ; Huang, Qiuyang^1^2 ; Luo, Fei^1^2

College of Civil Engineering, Sichuan Agricultural University, Dujiangyan Sichuan, 611830, China^1

Sichuan Higher Educ. Eng. Res. Center for Disaster Prevention and Mitigation of Village Construction, Dujiangyan, Sichuan

611830, China^2

关键词: Confining pressures;    Constitutive relations;    Conventional triaxial test;    Duncan Chang model;    Fitting precision;    Fitting results;    Low temperatures;    Strain-softening;   

Others  :  https://iopscience.iop.org/article/10.1088/1755-1315/218/1/012011/pdf
DOI  :  10.1088/1755-1315/218/1/012011

学科分类：土木及结构工程学

来源: IOP

【 摘 要 】

The MTS-Landmark 370.10 test system is used to carry out low temperature conventional triaxial tests on frozen sand at a temperature of-7 ° C and the confining pressures of 0.1, 0.5, 1, 4, and 8 MPa. The test results show that the deviation stress-Axial strain relationship curves of frozen sand are strain softening type, which can be divided into three stages: linear, nonlinear and strain softening. The modified Duncan-Chang model proposed by Lai et al. is used to describe the constitutive relation of frozen sand. The fitting results show that the model has good applicability and high fitting precision.