岩土工程学报2024，Vol.46Issue(8)：1783-1790,8.DOI:10.11779/CJGE20230390
颗粒表面粗糙度对材料小应变动力特性的影响
Effects of surface roughness of particles on small-strain dynamic properties of granular materials
摘要
Abstract
The small-strain shear modulus and damping ratio are the important dynamic properties of granular soils,which are influenced by the packing density and stress states of the soil element as well as the particle characteristics including gradation,shape of particles,etc.As one of the important particle characteristics,however,the surface roughness of particles is often ignored by the previous investigations regarding the small-strain dynamic properties of granular soils.In this study,the small-strain dynamic properties of specimens of glass beads with different surface roughnesses are measured using the energy injecting virtual mass resonant column system.The surface roughness of the glass beads is quantified with the assistance of the three-dimensional interference microscope.The experimental results show that the small-strain shear modulus decreases with the increasing surface roughness of particles,while there is no obvious effects of surface roughness on the small-strain damping ratio.Clearly,the effects of surface roughness on the small-strain dynamic properties cannot be ignored particularly when other influencing factors,such as particle shape and gradation,are similar.关键词
表面粗糙度/颗粒材料/小应变/剪切模量/阻尼比Key words
surface roughness/granular material/small strain/shear modulus/damping ratio分类
建筑与水利引用本文复制引用
张涛,吴健,魏骁,杨仲轩..颗粒表面粗糙度对材料小应变动力特性的影响[J].岩土工程学报,2024,46(8):1783-1790,8.基金项目
浙江省"尖兵""领雁"研发攻关计划项目(2022C03180) （2022C03180）
国家自然科学基金青年科学基金项目(52108351) （52108351）
浙江省建设厅项目(2022K073) （2022K073）
浙江交工协同创新联合研究中心项目(ZDJG2021001) （ZDJG2021001）
