Experimental Study on Split Hopkinson Pressure Bar Pulse-Shaping Techniques for Concrete

被引：27
作者：
Chen, Xudong [1 ]
Ge, Limei [1 ]
Zhou, Jikai [1 ]
Wu, Shengxing [1 ]
机构：
[1] Hohai Univ, Coll Civil & Transportat Engn, Nanjing 210098, Jiangsu, Peoples R China
来源：
JOURNAL OF MATERIALS IN CIVIL ENGINEERING | 2016年 / 28卷 / 05期
关键词：
Split Hopkinson pressure bar; Strain rate; Concrete; Testing; HIGH-STRAIN RATE; COMPRESSIVE STRENGTH ENHANCEMENT; FIBER-REINFORCED CONCRETE; DYNAMIC STRENGTH; APPARATUS; CERAMICS; FAILURE; MORTAR; TESTS;
D O I：
10.1061/(ASCE)MT.1943-5533.0001494
中图分类号：
TU [建筑科学];
学科分类号：
0813 ;
摘要：
The dynamic compressive behavior of concrete is investigated using a phi 74-mm variable cross section straight taper split Hopkinson pressure bar (SHPB) apparatus in this study. In order to reduce and eliminate the waveform dispersion effect, two pulse shaping techniques are adopted to improve the incident wave shape. The two techniques include changing the striker (length, shape) and copper pulse shapers (diameter, thickness, shape). Experimental results show that the pulse shaping effect with the small diameter of copper shaper is better than that of the tapered striker and annular pulse shaper, all of which could reach dynamic stress equilibrium, and reduce the high-frequency oscillation, and achieve constant strain-rate deformation approximately.
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页数：10
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