防灾减灾工程学报2012，Vol.32Issue(5)：535-538,551,5.
粗粒料湿化变形数值模拟研究
Numerical Simulation Study on Wetting Deformation of Coarse Aggregate Materials
摘要
Abstract
Wetting deformation, which has significant effect on the stability of rock-filling dams, has been studied mainly by triaxial tests and direct shear tests. The indoor test is widely used to study the wetting deformation of dry samples and saturated sample, but few researches focus on unsaturated materials. Based on the test results of coarse aggregate materials under different confining pressures, the wetting deformation was studied by numerical simulations. The results indicate that the influence of the wetting deformation can be obtained by changing the micro shear modulus and friction coefficient. Particle breakage of coarse aggregate is increased with the increase of saturability and confining pressure. The shear strength and cohesion of the coarse aggregate materials decrease after wetting deformation, and the friction angle basically remains unchanged.关键词
粗粒料/颗粒流/湿化变形/抗剪强度Key words
coarse aggregate material/ particle flow/ wetting deformation/ shear strength分类
建筑与水利引用本文复制引用
杨贵,刘汉龙,朱俊高..粗粒料湿化变形数值模拟研究[J].防灾减灾工程学报,2012,32(5):535-538,551,5.基金项目
国家杰出青年科学基金项目(50825901)、国家自然科学基金项目(51109068)资助 （50825901）
