岩土工程学报2025，Vol.47Issue(2)：265-274,10.DOI:10.11779/CJGE20230404
砂土应力-应变包络线的唯一性初探
Preliminary study on uniqueness of stress-strain envelope curves of sand
摘要
Abstract
The uniqueness of the stress-strain envelope curves of sand under cyclic unloading is of great importance in understanding the inherent properties of the sand.A series of monotonic triaxial compress tests and cyclic triaxial tests,considering constant amplitude,step stress amplitude as well as random stress amplitude,are conducted on the silica powder and Fujian standard sand to explore the consistency between the stress-strain envelope curves and monotonic curve by employing the full-surface digital image measurement system.The results show that the monotonic stress-strain curves of the soil samples with the same density and confining pressure are approximately consistent with the stress-strain envelope curves that undergo different cyclic stress processes,and the uniqueness of the stress-strain envelope curves of the sand is proposed.The influences of the cyclic stress history and stress level on the regression velocity of the curves and the application of the uniqueness of the stress-strain envelope curves in the establishment of the axial strain accumulation model are discussed.关键词
应力-应变外包络线/循环荷载/砂土/轴向累积应变Key words
stress-strain envelope curve/cyclic loading/sand/axial cumulative strain分类
建筑与水利引用本文复制引用
邵龙潭,高睿,夏平心,郭晓霞,孙衍朴..砂土应力-应变包络线的唯一性初探[J].岩土工程学报,2025,47(2):265-274,10.基金项目
国家自然科学基金项目(52079018,4240070651) （52079018,4240070651）
常州领军型创新人才引进培育项目(KYZ23020054) （KYZ23020054）
