不同钢纤维类型对高性能混凝土抗折性能影响模拟分析  

Simulation analysis of influence of flat and circular steel fibers on flexural performance of high performance concrete

作　　者：李妍[1,2] 郭远哲 LI Yan;GUO Yuan-zhe(School of civil engineering,Jilin Jianzhu university,Changchun 130118,China;Green building technology engineering research center in cold region of Jilin province,Changchun 130118,China)

机构地区：[1]吉林建筑大学土木工程学院,长春130118 [2]吉林省寒地绿色建筑技术工程研究中心,长春130118

出　　处：《吉林建筑大学学报》2024年第1期17-22,共6页Journal of Jilin Jianzhu University

基　　金：吉林省科技厅国际科技合作项目(20210402073GH).

摘　　要：本文以钢纤维混凝土抗折强度计算理论为基础,分析混凝土在分别添加平直形和圆环形钢纤维的情况下抗折强度的变化。运用有限元模拟分析软件ABAQUS进行数值模拟,不同掺量的平直形和圆环形钢纤维掺入混凝土梁,得到梁受压损伤云图和荷载位移曲线的变化,分析平直形和圆环形钢纤维对高性能混凝土抗折性能的影响,验证了有限元模拟的合理性。通过对有限元数值模拟结果的分析,相比较钢纤维体积掺量为0.5%,当钢纤维体积掺量为1.0%和1.5%时,平直形钢纤维混凝土的抗折强度分别增加了20.02%和26.62%,圆环形钢纤维混凝土的抗折强度分别增加了9.64%和46.98%。而对比两种形状的钢纤维掺入,体积含量为1.5%的圆环形钢纤维对混凝土的抗折强度,延性性能的增强效果更优。Based on the theory of calculating the flexural strength of steel fiber reinforced concrete,this paper analyzes the flexural strength of concrete under the condition of adding flat and circular steel fiber respectively.The finite element simulation analysis software ABAQUS was used for numerical simulation,and different amounts of flat straight and circular steel fibers were mixed into the concrete beam,the beam compression damage cloud map and load displacement curve changes were obtained,the influence of flat straight and circular steel fibers on the flexural performance of high performance concrete was analyzed,and the rationality of the finite element simulation was verified.Through the analysis of finite element numerical simulation results,compared with the volume content of steel fiber is 0.5%,when the volume content of steel fiber is 1.0% and 1.5%,the flexural strength of flat steel fiber concrete increases by 20.02% and 26.62% respectively,and the flexural strength of circular steel fiber concrete increases by 9.64% and 46.98% respectively.Compared with the two kinds of steel fiber,the annular steel fiber with a volume content of 1.5%has a better enhancement effect on the flexural strength and ductility of concrete.

关 键 词：圆环形钢纤维 高性能混凝土 抗折性能 延性性能 有限元模拟 

分 类 号：TU398.7[建筑科学—结构工程]