钢管钢纤维高强混凝土抗冲击压缩性能的试验研究与数值模拟<sup>*</sup>

doi:10.11896/j.issn.1005-023X.2017.023.018

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Abstract The construction and optimization of bursting layer plays a significant role in the development of defensive fortifications. The honeycomb bursting layer made of steel fiber reinforced high strength concrete-filled steel tube is a new type of bursting layer with high impact resistance. In this paper, a dynamic mechanical test and a numerical simulation for a lab-prepared steel fiber reinforced high strength concrete-filled steel tube were conducted by using a split Hopkinson pressure bar (SHPB) set-up and the kinetic finite element analysis software LS-DYNA, respectively. The steel fiber content and tube thickness of the high strength concrete filled steel tubes for impact compression test were set at 0%, 0.5%, 1.0%, 1.5% and 2 mm, 3 mm, respectively. The results showed that steel fiber reinforced high strength concrete-filled steel tube exhibits strain rate strengthening effect, as higher strain rates corresponded to greater dynamic compressive strengths. When the air pressure was 1.0 MPa, the specimen with 3 mm tube thickness and 1.5% steel fiber content achieved a dynamic compressive strength of 258.3 MPa. Compared with steel fiber reinforced high strength concrete, the steel fiber reinforced high strength concrete filled-steel tube possesses better impact compression perfor-mance, as the maximum relative increase of dynamic compressive strength reached 35.4%, also the ability to withstand repeated impact compressions. The numerical simulation coincided well with the experimental results, which confirmed the feasibility of the numerical simulation method.

Key words： steel fiber reinforced high strength concrete-filled steel tube impact compression stress wave

Published: 08 May 2018

CLC number:

TQ325.1+2

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	Articles by authors
	LI Ji
	SHI Shaoqing
	HE Qiulin
	WANG Qifan

Cite this article:

LI Ji,SHI Shaoqing,HE Qiulin, et al. Experimental Study and Numerical Simulation on the Impact Compression Performance of Steel Fiber Reinforced High Strength Concrete-filled Steel Tube[J]. Materials Reports, 2017, 31(23): 125-131.

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http://www.mater-rep.com/EN/10.11896/j.issn.1005-023X.2017.023.018 OR http://www.mater-rep.com/EN/Y2017/V31/I23/125

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