期刊论文

中文

Dizhen Xuekan

1003-868X

2016

36

2

225-230

10.13409/j.cnki.jdpme.2016.02.009

国家自然科学基金项目（51204098） 南华大学“十二五”科技创新团队项目（2012NHCXTD12）资助

本校为第一机构

基于统一强度理论与扰动状态概念（DSC）,考虑洛德参数影响,建立了同时考虑中间主应力（IPS）和扰动影响的粗粒土IPS-DSC应力—应变模型。根据某坝基粗粒料三轴剪切试验结果,采用拟合方法对IPS-DSC模型参数进行反演和优化,模拟曲线和试验曲线对比显示两者基本吻合,说明该模型能较好地描述粗粒土应力应变特性。进一步研究表明,其洛德参数、中间主应力系数及扰动影响参数对粗粒料应力应变曲线影响较大,粗粒土应力应变曲线先随洛德参数增大上升至临界值,后随洛德参数增大而下降,软化现象先减弱后增强;随中间主应力系数的增大,呈上升趋势,峰值增加明显,软化现象更加突出;随扰动影响参数增加而上升且...

This paper establishes a coarse grain soil stress-strain model based on unified strength theory and disturbed state concept(DSC)and considers the influence of Lode parameter.The model can reflect the influence of intermediate principal stress(IPS)and disturbance.According to the results of a dam coarse grain soil triaxial shear test resuits to make inversion and parameter optimization of the IPS-DSC model by using the fitting method.The simulation curve and test curve are consistent.This shows that the model can better describe the stress-strain characteristics of coarse grain soil.Further stu...