摘要
在胶凝堆石料的抗压强度、抗折强度和大三轴试验基础上,通过试验数据回归分析,得出胶凝堆石料的强度与围压之间满足相关关系,结合初始切线弹模的表达式和Et/Ei?S曲线可导出该材料在压缩状态和拉伸状态下的本构关系模型;根据所得出的本构关系模型对抗折强度试验和大三轴试验过程进行数值模拟,计算结果与试验结果非常接近,说明通过试验得出的胶凝堆石料应力应变本构关系模型是合理有效的,可为胶凝堆石坝的计算分析设计提供参考依据。
Based on the compression strength tests,bending tests and large scale triaxial tests on cemented sand and gravel（CSG） materials,the correlativity between the strength of CSG materials and the ambient pressure is deduced,and a constitutive equation for the materials during the phases of compression and tension is established combining with the expression of the original tangent modulus and the curve of Et/ Ei？ S.According to this constitutive equation,the processes of the bending tests and large scale triaxial tests are simulated.Comparing the test results with those of FEM analysis,we find that they are very similar.It means that the proposed constitutive equation for the CSG material is accurate and reasonable,and it can provide reference for the design and analysis of dams with CSG materials.
出处
《岩土工程学报》
EI
CAS
CSCD
北大核心
2010年第9期1340-1344,共5页
Chinese Journal of Geotechnical Engineering
关键词
本构方程
大三轴试验
胶凝堆石料
constitutive equation
the large scale triaxial tests
CSG material
