岩土工程学报2024，Vol.46Issue(6)：1289-1299,11.DOI:10.11779/CJGE20230167
小比尺条形基础承载力模型试验的尺寸效应研究
Size effects of small-scale model tests on bearing capacity of strip foundation
摘要
Abstract
The small-scale model test is an important method to study the bearing capacity in soil mechanics.However,the size effects of small-scale model will affect its quantitative results,so that the small-scale test can only be used for qualitative researches.In this study,20 groups of small-scale model tests on bearing capacity of strip foundation are carried out in saturated sand foundation.The change of bearing capacity is studied by changing the foundation size,buried depth and compactness of sand.Then the discrete element analysis method is introduced,and the mechanical behavior of sand particles is simulated by rolling the resistance contact model.The bearing capacity tests on the strip foundation are simulated,and the source of the size effects of small-scale model tests and their influences on macroscopic bearing capacity are revealed from a microscopic point of view.The results show that there is a size effect in the small-scale model tests on the saturated sand foundation.The larger the foundation compactness and foundation depth,the more obvious the size effects.The size effects are the result of the combined effects of change of stress level,change of failure mode and degree of progressive failure.关键词
条形基础/地基承载力/小比尺模型试验/尺寸效应/离散元模拟/微观响应Key words
strip foundation/bearing capacity of foundation/small-scale model test/size effect/DEM/microscopic behaviour分类
建筑与水利引用本文复制引用
王一伟,刘润,梁超..小比尺条形基础承载力模型试验的尺寸效应研究[J].岩土工程学报,2024,46(6):1289-1299,11.基金项目
国家重点研发计划项目(2022YFB2603000) （2022YFB2603000）
国家杰出青年科学基金项目(51825904) （51825904）
