中外公路2026，Vol.46Issue(3)：45-55,11.DOI:10.14048/j.issn.1671-2579.2026.03.006
循环荷载作用下建筑固废混凝土的力学特性及颗粒破碎研究
Research on Mechanical Properties and Particle Breakage of Construction Solid Waste Concrete Under Cyclic Loading
摘要
Abstract
To investigate the mechanical properties and particle breakage effect of construction solid waste,a series of static and dynamic direct shear tests were carried out using a dynamic interface shear tester.Different coarse particle contents(40%,50%,and 60%),amplitudes(45 kPa,60 kPa,and 75 kPa),and frequencies(0.5 Hz,1.0 Hz,and 2.0 Hz)were used as variables,and the variation rules of shear stressshear displacement curves,shear strength parameters,and particle breakage under three normal stresses(50 kPa,100 kPa,and 150 kPa)were analyzed.The results indicate that under the same initial normal stress,with the increase of coarse particle content,the shear strength,internal friction angle,and relative breakage rate of construction solid waste increase,while the cohesion decreases.With the increase of amplitude and frequency,the shear strength,cohesion,internal friction angle,and relative breakage rate of construction solid waste all decrease.The shear stressshear displacement curves all exhibit a strain-softening type;during the shear process,fluctuation phenomena occur in the shear stressshear displacement curves.The particle size distribution curves after shearing show an overall upward shift trend,and with the increase of normal stress,the upward shift amplitude of the curves increases.关键词
建筑固废/大型直剪试验/循环荷载/颗粒破碎Key words
construction solid waste/large-scale direct shear test/cyclic load/particle breakage分类
交通工程引用本文复制引用
李雪健,宋杨,董晨曦,李胜凯,李旺远..循环荷载作用下建筑固废混凝土的力学特性及颗粒破碎研究[J].中外公路,2026,46(3):45-55,11.基金项目
国家自然科学基金资助项目(编号:51978237) （编号:51978237）
河北水利电力学院基本科研业务费重点培育项目(编号:SYKY2302) （编号:SYKY2302）
