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Title |
Evaluation of Material Properties Variations of Cementitious Composites under High Strain Rate by SHPB Test and Image Analysis
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Authors |
조현우(Hyun-Woo Cho) ; 이장화(Jang-Hwa Lee) ; 민지영(Ji-Young Min) ; 박정준(Jung-Jun Park) ; 문재흠(Jae-Heum Moon) |
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DOI |
http://dx.doi.org/10.11112/jksmi.2015.19.4.083 |
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Keywords |
Impact ; Blast ; High strain rate ; SHPB ; UHPC ; High speed camera |
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Abstract |
Under impact or blast loads, concrete behaves with different mechanical properties comparing to the static loading conditions. In other words, with high strain rate, mechanical properties of concrete vary significantly. To evaluate the compressive characteristics of concrete with high strain rate, SHPB(Split Hopkinson Pressure Bar) test is typically used. However, because SHPB test method has been developed for metallic materials, it is necessary to verify the applicability of SHPB for brittle materials such as concrete. Also, there have been little researches on the evaluations of mechanical characteristics of UHPC under high strain rate conditions. This study has been performed to evaluate and analyse the compressive characteristics of plain concrete and UHPC with SHPB test apparatus. Also, to verify the applicability of SHPB test for concrete, direct displacement image analysis with high speed camera was performed for the comparisons with analytical solutions for SHPB test.
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