堆石料残余变形特性研究
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摘要
应用自行研制的高精度中型动三轴仪,对某筑坝堆石料的动力残余变形特性进行了试验研究。在充分考虑应力水平对残余动剪应变影响的基础上,对沈珠江提出的模型进行了改进,并利用试验求得的参数对理想面板堆石坝进行了残余变形有限元分析。研究表明:低坝时,改进模型与沈珠江模型计算的结果差别不大;随着坝高的增加、地震烈度的增大,两者计算的结果差别增大。
The residual deformation behaviors of rock-fill materials were experimentally studied by use of a triaxial apparatus with the medium diameter.The major attention was focused on the influence of the stress level.Based on the test results,the residual deformation model presented by Shen Zhujiang was modified.By use of the modified model,the deformation behaviors of concrete faced rock-fill dams were numerically analyzed.It was shown that the deformation predicted by the modified model was close to that by Shen Zhujiang model for low dams,but with the increase of the dam height and earthquake magnitude,the difference between the two models became larger.
The residual deformation behaviors of rock-fill materials were experimentally studied by use of a triaxial apparatus with the medium diameter.The major attention was focused on the influence of the stress level.Based on the test results,the residual deformation model presented by Shen Zhujiang was modified.By use of the modified model,the deformation behaviors of concrete faced rock-fill dams were numerically analyzed.It was shown that the deformation predicted by the modified model was close to that by Shen Zhujiang model for low dams,but with the increase of the dam height and earthquake magnitude,the difference between the two models became larger.
引文
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[7]SL237—006土工试验规程[S].(Sl237—006 Standards of geotechnical experimentation[S].(in Chinese))
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[9]迟世春,林皋,孔宪京.堆石料残余体应变对计算面板堆石坝永久变形的影响[J].水力发电学报,1998,60(1):59–67.(CHI Shi-chun,LIN GAO,KONG Xian-jing.Influence of residual volumetric strain of rock fill material on calculated permanent deformation of concrete faced rock fill Dams[J].Journal of Hydroelectric Engineering,1998,60(1):59–67.(in Chinese))
[2]王昆耀,常亚屏,陈宁.往返荷载下粗粒土的残余变形特性[J].土木工程学报,2000,33(3):48–53.(WANG Kun-yao,CHANG Ya-ping,CHEN Ning.Residual deformation characteristics of coarse-grained soils under cyclic loading[J].China Civil Engineering Journal,2000,33(3):48–53.(in Chinese))
[3]孔宪京,韩国成,等.粗粒料动应力–应变关系试验研究[R].大连:大连理工大学,1994.(KONG Xian-jing,HAN Guo-cheng,et al.Experimentally investigate on the relationship between dynamic stress and strain[R].Dalian:Dalian University of Technology,1994.(in Chinese))
[4]贾革续,孔宪京.粗粒土动残余变形特性的试验研究[J].岩土工程学报,2004,26(1):26–30.(JIA Ge-xu,KONG Xian-jing.Study on residual deformation characteristics of coarse-grained soils[J].Chinese Journal of Geotechnical Engineering.2004,26(1):26–30.(in Chinese))
[5]沈珠江,徐刚.堆石料的动力变形特性[J].水利水运科学研究,1996,6(2):143–150.(SHEN Zhu-jiang,XU Gang.Deformation behavior of rock material under cyclic loading[J].Hydro-Science and Engineering,1996,6(2):143–150.(in Chinese))
[6]孔宪京,张涛,邹德高,等.中型动三轴仪的研制及微小应变测试技术的应用[J].大连理工大学学报,2005,45(1):79–84.(KONG Xian-jing,ZHANG Tao,ZOU De-gao,et al.Design of medium scale dynamic triaxial test apparatus and its application at small strains[J].Journal of Dalian University of Technology,2005,45(1):79–84.(in Chinese))
[7]SL237—006土工试验规程[S].(Sl237—006 Standards of geotechnical experimentation[S].(in Chinese))
[8]邹德高,孔宪京.Geotechnical dynamic nonlinear analysis-GEODYNA使用说明[R].大连:大连理工大学土木水利学院工程抗震研究所,2003.(ZOU De-gao,KONG Xian-jing.Geotechnical dynamic nonlinear analysis-GEODYNA user manual[R].Dalian:Earthquake Engineering Research Institute,Dalian University of Technology,2003.(in Chinese))
[9]迟世春,林皋,孔宪京.堆石料残余体应变对计算面板堆石坝永久变形的影响[J].水力发电学报,1998,60(1):59–67.(CHI Shi-chun,LIN GAO,KONG Xian-jing.Influence of residual volumetric strain of rock fill material on calculated permanent deformation of concrete faced rock fill Dams[J].Journal of Hydroelectric Engineering,1998,60(1):59–67.(in Chinese))
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