您的位置：首页 > 论文页面
钢纤维混凝土准静态和冲击三轴劈拉强度实验研究
发表时间：2014-08-15 浏览量：2131 下载量：811
| 全部作者： | 曲嘉，邹广平，夏培秀 |
| 作者单位： | 哈尔滨工程大学航天与建筑工程学院 |
| 摘 要： | 为研究混凝土材料的拉-拉-压三轴强度，建立混凝土球型试样主应力比值为σ1∶σ2∶σ3=0.24∶0.24∶-1.00的劈拉实验方法，并分别采用万能材料试验机和分离式霍普金森压杆(split Hopkinson pressure bar, SHPB)对钢纤维掺量为1%的混凝土球型试样进行准静态劈拉实验和动态劈拉实验。准静态实验中，钢纤维混凝土试样的平均应变率为8.3×10-5 s-1，劈拉强度为0.77 MPa，与已有研究结果相符。高应变率实验中，试样平均应变率为170 s-1，劈拉强度为1.01 MPa，与准静态实验结果对比表明：钢纤维混凝土劈拉强度随应变率增加而增加。 |
| 关 键 词： | 实验固体力学；三轴劈拉强度；分离式霍普金森压杆；钢纤维混凝土；主应力比；应变率 |
| Title： | Experimental study of steel fiber reinforced concrete tri-axial split strength under quasi-static and impact loading |
| Author： | QU Jia, ZOU Guangping, XIA Peixiu |
| Organization： | College of Aerospace and Civil Engineering, Harbin Engineering University |
| Abstract： | Splitting tensile test methodology has been established for the concrete spheriform specimens with the principal stress ratio σ1∶σ2∶σ3=0.24∶0.24∶-1.00 in order to study the tensile-tensile-compressive tri-axial strength. With the application of universal material testing machine and split Hopkinson pressure bar (SHPB), the quasi-static and dynamic splitting tensile tests have been exerted for the concrete spheriform specimens with 1% steel fiber dosage. In the quasi-static test, the average strain rate of the steel fiber reinforced concrete specimens is 8.3×10-5 s-1 and the splitting tensile strength is 0.77 MPa, which is consistent with the existing papers. In high strain rate tests, the average strain rate is 170 s-1 and the splitting tensile strength is 1.01 MPa. Compared with the quasi-static testing results, it is shown that the splitting tensile strength of steel fiber reinforced concrete increases with the rise of strain rate. |
| Key words： | experimental solid mechanics; tri-axial split strength; split Hopkinson pressure bar; steel fiber reinforced concrete; principal stress ratio; strain rate |
| 发表期数： | 2014年8月第15期 |
| 引用格式： | 曲嘉，邹广平，夏培秀. 钢纤维混凝土准静态和冲击三轴劈拉强度实验研究[J]. 中国科技论文在线精品论文，2014，7（15）：1501-1507. |
0
评论数 0请您登录
暂无评论
下载全文
多维论文