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학술연구/단체지원/교육 등 연구자 활동을 지속하도록 DBpia가 지원하고 있어요.
커뮤니티
연구자들이 자신의 연구와 전문성을 널리 알리고, 새로운 협력의 기회를 만들 수 있는 네트워킹 공간이에요.
논문 기본 정보
- 자료유형
- 학술저널
- 저자정보
- 저널정보
- 한국콘크리트학회 International Journal of Concrete Structures and Materials International Journal of Concrete Structures and Materials Vol.16 No.4
- 발행연도
- 2022.7
- 수록면
- 417 - 429 (13page)
이용수
초록· 키워드
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In general, concrete behaves differently when the load is applied at a different speed, i.e. concrete’s mechanical parameters are strain-rate sensitive. There is a need for an experimental method that should meet several criteria such as removal or accurate description of boundary conditions, simplicity, affordability and reproducibility of the experiments. The main goal of this study is the design, assembly and optimisation of the experimental apparatus and procedure to carry out the impact testing. Using this apparatus, an experimental study was conducted. The main aspect of this experimental method is the elimination of rigid supports, which could negatively affect the obtained results. Measured data are acquired using specifically designed measuring devices and analysed using a computer script. Four concrete mixtures were examined ranging from high-strength concrete to ultra high-performance concrete. Quasi-static experiments were also carried out for comparison. A clear difference in quasi-static and impact performance of the materials was observed. Different trends for different compositions of the tested concrete specimens were apparent. Higher fibre content specimens generally showed higher strain-rate sensitivity and the highest strain-rate sensitivity was observed in combination with the two strongest concrete matrices. This was most probably related to fibre anchoring, as complete fibre pullout before premature matrix failure was critical. The newly designed measuring apparatus greatly improves the speed and precision of conducting the impact experiments. It can be successfully used for a relatively quick and simple comparison of materials when designing concretes for withstanding elevated strain-rate loading.
목차
Abstract
1 Introduction
2 Design of the Experiments
3 Experimental Programme
4 Experimental Results and Discussion
References
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