摘要
通过贯入力学试验研究特性材料拦阻系统(EMAS)泡沫混凝土在破碎碾压过程中的力学性能,并分析了冻融作用对其压溃强度及吸能效果的影响.在初步建立泡沫混凝土离散元模型的基础上,提出“虚拟试验法”,以获得泡沫混凝土离散元模型的最佳参数组合.通过模拟抗压强度试验证明了模型仿真精度可达97.7%.在此模型的基础上,研究了混凝土子颗粒及孔隙颗粒的半径和力学参数对材料贯入力学性能的影响.所提出的EMAS泡沫混凝土材料离散元模型可为EMAS拦阻过程仿真提供更为精确的研究方法.
Penetration tests were conducted to study the mechanical properties of engineered materials arresting system(EMAS) foam concrete in crushing process. The effects of freeze-thaw cycles on its compressive strength and energy absorption were analyzed. A discrete element model of foam concrete was established, and the virtual test method was proposed to calibrate parameters of the model. The simulation results of compressive strength prove that the accuracy of the model can reach 97.7%. With this model, the influences of particle size and mechanical parameters on penetration mechanical properties of foam concrete were studied. The discrete element model of EMAS foam concrete proposed in this work provides a more accurate research method for EMAS arresting simulation.
作者
朱兴一
张启帆
于越
石小培
ZHU Xingyi;ZHANG Qifan;YU Yue;SHI Xiaopei(Key Laboratory of Road and Traffic Engineering of Ministry of Education,Tongji University,Shanghai 201804,China;China State Construction Silkroad Construction Investment Group Co.,Ltd.,Xi’an 710075,China;China Highway&Transportation Society,Beijing 100011,China)
出处
《建筑材料学报》
EI
CAS
CSCD
北大核心
2023年第2期122-128,共7页
Journal of Building Materials
基金
国家自然科学基金资助项目(51922079,61911530160)
上海市教育发展基金会和上海市教委“曙光计划”(21SG24)
上海市“科技创新行动计划”国际科技合作项目(22210710700)。
关键词
泡沫混凝土
特性材料拦阻系统
离散元
贯入力学性能
破碎仿真
foam concrete
engineered materials arresting system(EMAS)
discrete element method
penetration mechanical property
crushing simulation
