Development of constant strain increment ratio path tests
SONG Fei 1 2, ZHANG Jianmin 1 2, ZHANG Ga 1 2, ZHENG Ruihua 1 2, FU Jingchong 3
1.Institute of Geotechnical Engineering Tsinghua University Beijing 100084 China 2.State Key Lab of Hydrosciences and Engineering Tsinghua University Beijing 100084 China 3.Tianshui Hongshan Testing Machine Company Tianshui 741001 China
Abstract：It is of vital importance to study the mechanical response of sand in strain-path controlled tests during which the ratio of lateral to axial strain increments is kept constant.By employing a transducer for measuring the volumetric strain of the sample and adjusting the lateral stress in axial strain controlled tests,a conventional triaxial test apparatus is improved to control the strain increment ratio,defined as the ratio of lateral to axial strain increments,constant in the strain path test.The device can be applied in the investigation of stress-strain behavior of sand loaded along constant strain increment ratio paths.In addition,the constant strain path tests are conducted for sand.Comparison and analysis of the test results indicate the satisfactory experimental precision of the apparatus,thus showing its effectiveness.
宋飞；张建民；张嘎；郑瑞华；付敬宠；. 等应变增量比试验控制功能的开发与实现[J]. 岩土工程学报, 2009, 31(7): 1144-1148.
SONG Fei 1 2, ZHANG Jianmin 1 2, ZHANG Ga 1 2, ZHENG Ruihua 1 2, FU Jingchong 3. Development of constant strain increment ratio path tests. Chinese J. Geot. Eng., 2009, 31(7): 1144-1148.
