摘要
研究了竹纤维的掺量(0、0.1%、0.5%)和长度(0、7.5、22.5 mm)对轻骨料混凝土(Lightweight aggregate concrete,LAC)抗压强度的影响。采用离散元方法从细观层次上模拟了竹纤维增强LAC的单轴抗压性能,揭示了竹纤维的作用机制。结果表明:随着竹纤维掺量和长度的增加,LAC的抗压强度均呈先增大后减小的趋势,最佳掺量和长度分别为0.1%和7.5 mm;建立的离散元模型能够较好地模拟竹纤维增强LAC的单轴抗压性能;竹纤维增强LAC中的接触类型有基质间接触、基质-骨料界面接触、骨料间接触、基质-纤维界面接触、纤维间接触。
The influence of bamboo fiber content(0,0.1%,0.5%)and length(0,7.5,22.5 mm)on the compressive strength of lightweight aggregate concrete(LAC)was studied.The discrete element method was used to simulate the uniaxial compressive performance of bamboo fiber reinforced LAC at the microscopic level,and the action mechanism of bamboo fiber was revealed.The results show that with the increase of bamboo fiber content and length,the compressive strength of LAC shows a trend of first increasing and then decreasing.The optimal content and length are 0.1%and 7.5 mm,respectively.The established discrete element model can simulate the uniaxial compressive performance of bamboo fiber reinforced LAC well.The contact types in bamboo fiber reinforced LAC include matrix to matrix contact,matrix-aggregate interface contact,aggregate to aggregate contact,matrix-fiber interface contact,and fiber to fiber contact.
作者
朱然
ZHU Ran(Shanghai Construction Group Co.,Ltd.,Shanghai 200080,China;Shanghai Engineering Research Center for High-Performance Concrete of Tall Structures,Shanghai 201114,China)
出处
《混凝土与水泥制品》
2026年第2期27-33,共7页
China Concrete and Cement Products
基金
上海市科委科研计划项目(18DZ2282600)
上海建工集团股份有限公司资助项目(22YJKF-34、24JCYJ-04)。
关键词
竹纤维
轻骨料混凝土(LAC)
单轴抗压强度
离散元方法
数值模拟
细观机理
Bamboo fiber
Lightweight aggregate concrete(LAC)
Uniaxial compressive strength
Discrete element method
Numerical simulation
Microscopic mechanism
