材料科学与工程学报2025，Vol.43Issue(4)：578-588,11.DOI:10.14136/j.cnki.issn1673-2812.2025.04.009
碳纤维再生混凝土压剪力学性能及颗粒流模拟
Compression-shear Mechanical Properties and Particle Flow Simulation of Carbon Fiber Recycled Concrete
摘要
Abstract
To investigate the influence of carbon fiber on the shear performance of recycled concrete under combined compression and shear,we conducted compression-shear tests,varying fiber length,content,and normal stress.We analyzed the contribution of these factors to shear strength and examined the compression-shear failure characteristics of the specimens in conjunction with particle flow analysis.The findings indicated an initial increase and subsequent decrease in shear strength with increasing fiber length,with a peaking value at 6 mm.Enhancing fiber content and normal stress led to an increase in shear strength.As normal stress escalated,the specimen's failure mode gradually transitioned from shear failure to compression-shear composite failure and eventually to compression failure.The specimen exhibited an elevated count and angle of oblique cracks upon destruction.The introduction of carbon fiber resulted in reduced oblique crack angles and failure areas compared to the control group,displaying improved resistance and a slower failure mode.However,the overall failure pattern remained akin to that of the control group.Through the utilization of particle flow software simulation,it determined that an increase in normal stress led to a gradual rise in the total number of micro-cracks as the specimen underwent final destruction.Following the introduction of fibers,they acted as a barrier against cracks in the specimen,effectively impeding the initiation and progression of micro-cracks.The stress distribution of the specimen was improved,and the failure characteristics aligned closely with those observed during indoor testing.The findings of our research provide crucial guidance for the design of recycled concrete structures.关键词
纤维长度/再生混凝土/抗剪强度/破坏特征/颗粒流Key words
Fiber length/Recycled concrete/Shear strength/Failure characteristic/Particle flow code分类
建筑与水利引用本文复制引用
吴睿,范祥,叶建,张晋华,邱昌..碳纤维再生混凝土压剪力学性能及颗粒流模拟[J].材料科学与工程学报,2025,43(4):578-588,11.基金项目
临江复杂环境地下环路建造关键技术项目(CSCEC3Z-2021-07) （CSCEC3Z-2021-07）
