冲击荷载下钢纤维混凝土材料力学性能测试  

Test of strength of materials performance of steel fiber reinforced concrete under impact load

作　　者：高秀青 葛吉宏 GAO Xiuqing;GE Jihong(Architectural Department,Lyuliang University,Lüliang 033000,China;College of Geographic Sciences,Shanxi Normal University,Taiyuan 030031,China)

机构地区：[1]吕梁学院建筑系,山西吕梁033000 [2]山西师范大学地理科学学院,山西太原030031

出　　处：《混凝土》2024年第10期185-188,共4页Concrete

摘　　要：为了充分了解钢纤维混凝土材料在受到冲击荷载时的力学性能,开展冲击荷载下钢纤维混凝土材料力学性能测试研究。选择混凝土制备的材料,并详细阐述了所使用钢纤维的各项参数。在设定混凝土制备的配合比与钢纤维的掺量后,按照流程进行钢纤维混凝土的制备。根据制备的钢纤维混凝土试件,采用分离式霍普金森压杆装置,进行钢纤维混凝土的冲击荷载测试。测试结果显示,当钢纤维掺量为1.1%时,SFRC-4试件的延性比高达15.41%;损伤度最低,仅为0.062;抗压强度最高,达到53.5 MPa;增韧系数最高,达到9.98;峰值应力最高,同时SFRC-4试件的应变最大。因此说明适当增加钢纤维的掺量,可以提高混凝土的力学性能,但是添加过量,则会导致性能的降低。通过此次研究,旨在为钢纤维混凝土的实际应用提供有效的理论指导。In order to fully understand the mechanical properties of steel fiber reinforced concrete under impact load,the strength of materials properties of steel fiber reinforced concrete under impact load were tested.The selection of materials for concrete preparation was carried out,and the various parameters of the steel fibers used were elaborated in detail.After setting the mix ratio for concrete preparation and the amount of steel fiber,the steel fiber concrete is prepared according to the process.Based on the prepared steel fiber reinforced concrete specimens,a separate Hopkinson compression rod device was used to conduct impact load tests on steel fiber reinforced concrete.The test results show that when the steel fiber content is 1.1%,the ductility ratio of SFRC-4 specimens is as high as 15.41%.The damage degree is the lowest,only 0.062.The compressive strength is the highest,reaching 53.5 MPa.The toughening coefficient is the highest,reaching 9.98.The peak stress is the highest,while the strain of the SFRC-4 specimen is the highest.Therefore,increasing the amount of steel fibers appropriately can improve the mechanical properties of concrete,but excessive addition can lead to a decrease in performance.Through this study,the aim is to provide effective theoretical guidance for the practical application of steel fiber reinforced concrete.

关 键 词：钢纤维 混凝土材料 冲击荷载试验 峰值应力 SHPB试验 

分 类 号：TU528.572[建筑科学—建筑技术科学]