不同应力路径下粗粒料力学特性试验研究
|
摘要
采用大型三轴试验机,对粗粒料进行了常规三轴、等p和等应力比等不同应力路径的试验。通过对试验结果进行对比分析,研究了粗粒料在不同应力路径下的应力-应变、变形和强度特性,并对粗粒料的卸载体缩现象进行了分析和探讨。结果表明,应力路径对粗粒料的应力-应变和变形特性影响较大,而对强度特性影响较小;卸载体缩主要是由偏应力比η的变化所引起的,与应力路径关系很大。
A series of large-scale triaxial tests under different stress paths are performed,including the conventional triaxial tests,constant p tests and constant stress ratio tests.Based on the comparison of test results,the stress-strain,deformation and strength characteristics of a coarse-grained material under different stress paths are investigated.Meanwhile,the phenomena of the volume-contraction in unloading is discussed.The test results indicate that the stress path has obvious influence on the stress-strain and deformation characteristics of the coarse-grained material,but little influence on strength characteristics.The volume-contraction in unloading of the coarse-grained material is caused by the change of deviatoric stress ratio and is related to stress path of test.
A series of large-scale triaxial tests under different stress paths are performed,including the conventional triaxial tests,constant p tests and constant stress ratio tests.Based on the comparison of test results,the stress-strain,deformation and strength characteristics of a coarse-grained material under different stress paths are investigated.Meanwhile,the phenomena of the volume-contraction in unloading is discussed.The test results indicate that the stress path has obvious influence on the stress-strain and deformation characteristics of the coarse-grained material,but little influence on strength characteristics.The volume-contraction in unloading of the coarse-grained material is caused by the change of deviatoric stress ratio and is related to stress path of test.
引文
[1]刘萌成,高玉峰,刘汉龙,等.堆石料变形与强度特性的大型三轴试验研究[J].岩石力学与工程学报,2003,22(7):1104-1111.LIU Meng-cheng,GAO Yu-feng,LIU Han-long,et al.Large-scale triaxial test study on deformation and strength characteristics of rockfill materials[J].Chinese Journal of Rock Mechanics and Engineering,2003,22(7):1104-1111.
[2]秦红玉,刘汉龙,高玉峰,等.粗粒料强度和变形特性的大型三轴试验研究[J].岩土力学,2004,25(10):1575-1580.QIN Hong-yu,LIU Han-long,GAO Yu-Feng,et al.Research on strength and deformation behavior of coarse aggregates based on large-scale triaxial tests[J].Rock and Soil Mechanics,2004,25(10):1575-1580.
[3]刘萌成,黄晓明,高玉峰,等.堆石料强度变形特性与非线性弹性本构模型研究[J].岩土力学,2004,25(5):798-802.LIU Meng-cheng,HUANG Xiao-Ming,GAO Yu-Feng,et al.Research on strength-deformation characteristics and nonlinear elastic model of rockfills[J].Rock and Soil Mechanics,2004,25(5):798-802.
[4]田堪良,张慧莉,骆亚生.堆石料的剪切强度与应力-应变特性[J].岩石力学与工程学报,2005,24(4):657-661.TIAN Kan-liang,ZHANG Hui-li,LUO Ya-sheng.Sheat strength and stress-strain properties of rockfill materials[J].Chinese Journal of Rock Mechanics andEngineering,2005,24(4):657-661.
[5]WANG Z L,DAFALIAS Y F,SHEN C K.Bounding surface hypoplasticity model for sands[J].Journal of Engineering Mechanics,ASCE,1986,112(9):966-987.
[6]陈生水,沈珠江,郦能惠.复杂应力路径下无粘性土的弹塑性数值模拟[J].岩土工程学报,1995,17(2):20-28.CHEN Sheng-shui,SHEN Zhu-jiang,LI Neng-hui.A elastoplastic model for cohesionless soils under complex stress paths[J].Chinese Journal of Geotechnical Engineering,2004,25(10):1575-1580.
[7]吴兴征,栾茂田,李相菘.复杂加载路径下堆石料动力本构模型及数值模拟[J].世界地震工程,2001,17(1):9-14.WU Xing-zheng,LUAN Mao-tian,LI Xiang-song.Bounding-surface hypoplastic model for rockfill materials under complex loading paths and its verification[J].World Information on Earthquake Engineering,2001,17(1):9-14.
[8]谢婉丽,王家鼎,张林洪.土石粗粒料的强度和变形特性的试验研究[J].岩石力学与工程学报,2005,24(3):430-437.XIE Wan-li,WANG Jia-ding,ZHANG Lin-hong.Testing study on characteristics of strength and deformation for coarse materials[J].Chinese Journal of Rock Mechanics and Engineering,2005,24(3):430-437.
[9]张丙印,吕明治,高莲士.粗粒料大型三轴试验中橡皮膜嵌入量对体变的影响及校正[J].水利水电技术,2003,34(2):30-33.ZHANG Bin-yin,LüMin-zhi,GAO Lian-shi.Correction of membrane penetration in large-scale triaxial tests for granular materials[J].Water Resources and Hydropower Engineering,2003,34(2):30-33.
[10]李广信,郭瑞平.土的卸载体缩与可恢复剪胀[J].岩土工程学报,2000,22(2):158-161.LI Guang-xin,GUO Rui-pin.Volume-contraction in unloading of shear test and reversible dilatation of soils[J].Chinese Journal of Geotechnical Engineering,2000,22(2):158-161.
[2]秦红玉,刘汉龙,高玉峰,等.粗粒料强度和变形特性的大型三轴试验研究[J].岩土力学,2004,25(10):1575-1580.QIN Hong-yu,LIU Han-long,GAO Yu-Feng,et al.Research on strength and deformation behavior of coarse aggregates based on large-scale triaxial tests[J].Rock and Soil Mechanics,2004,25(10):1575-1580.
[3]刘萌成,黄晓明,高玉峰,等.堆石料强度变形特性与非线性弹性本构模型研究[J].岩土力学,2004,25(5):798-802.LIU Meng-cheng,HUANG Xiao-Ming,GAO Yu-Feng,et al.Research on strength-deformation characteristics and nonlinear elastic model of rockfills[J].Rock and Soil Mechanics,2004,25(5):798-802.
[4]田堪良,张慧莉,骆亚生.堆石料的剪切强度与应力-应变特性[J].岩石力学与工程学报,2005,24(4):657-661.TIAN Kan-liang,ZHANG Hui-li,LUO Ya-sheng.Sheat strength and stress-strain properties of rockfill materials[J].Chinese Journal of Rock Mechanics andEngineering,2005,24(4):657-661.
[5]WANG Z L,DAFALIAS Y F,SHEN C K.Bounding surface hypoplasticity model for sands[J].Journal of Engineering Mechanics,ASCE,1986,112(9):966-987.
[6]陈生水,沈珠江,郦能惠.复杂应力路径下无粘性土的弹塑性数值模拟[J].岩土工程学报,1995,17(2):20-28.CHEN Sheng-shui,SHEN Zhu-jiang,LI Neng-hui.A elastoplastic model for cohesionless soils under complex stress paths[J].Chinese Journal of Geotechnical Engineering,2004,25(10):1575-1580.
[7]吴兴征,栾茂田,李相菘.复杂加载路径下堆石料动力本构模型及数值模拟[J].世界地震工程,2001,17(1):9-14.WU Xing-zheng,LUAN Mao-tian,LI Xiang-song.Bounding-surface hypoplastic model for rockfill materials under complex loading paths and its verification[J].World Information on Earthquake Engineering,2001,17(1):9-14.
[8]谢婉丽,王家鼎,张林洪.土石粗粒料的强度和变形特性的试验研究[J].岩石力学与工程学报,2005,24(3):430-437.XIE Wan-li,WANG Jia-ding,ZHANG Lin-hong.Testing study on characteristics of strength and deformation for coarse materials[J].Chinese Journal of Rock Mechanics and Engineering,2005,24(3):430-437.
[9]张丙印,吕明治,高莲士.粗粒料大型三轴试验中橡皮膜嵌入量对体变的影响及校正[J].水利水电技术,2003,34(2):30-33.ZHANG Bin-yin,LüMin-zhi,GAO Lian-shi.Correction of membrane penetration in large-scale triaxial tests for granular materials[J].Water Resources and Hydropower Engineering,2003,34(2):30-33.
[10]李广信,郭瑞平.土的卸载体缩与可恢复剪胀[J].岩土工程学报,2000,22(2):158-161.LI Guang-xin,GUO Rui-pin.Volume-contraction in unloading of shear test and reversible dilatation of soils[J].Chinese Journal of Geotechnical Engineering,2000,22(2):158-161.
版权所有：© 2023 中国地质图书馆 中国地质调查局地学文献中心