Research Paper
Abstract
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The Free-Free Resonant Test (FFRT) has been conducted to analyze the dynamic properties of each specimen with variation of material properties, such as particle size or joint pattern. Three types of mortar specimens have been made with different particle size, the artificial joint specimens have been made with different joint number, and the anhydrite specimens have been made with different joint thickness. From the results, it is shown that dynamic Young\\\'s modulus and dynamic shear modulus increase with particle size of sand in mortar specimen. These dynamic moduli show decreasing, however, with number of joint in artificial joint specimen. And also it is revealed that the dynamic moduli and joint thickness are inversely related.
본 연구에서는 공진주파수를 이용하여 시험편 매질의 특성에 따른 동적물성 값의 상관관계를 알아보고자 모르타르 시험편과 인공절리 시험편을 제작하고, 양단자유 공진주 시험을 수행하였다. 이를 통해 모래입자의 크기를 고려한 모르타르 시험편과 절리의 개수와 각도, 충전물의 두께를 고려한 시험편의 동탄성계수와 동전단계수 그리고 감쇠비와 동포아송비 등을 산정하고 각각의 동적물성 특성을 비교 분석하였다. 분석결과 모르타르 시험편의 입자크기가 작을수록, 인공절리의 개수 및 충전물질의 양이 많아질수록 동탄성계수와 동전단계수는 감소하는 것으로 나타났다.
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- Publisher :The Korean Society of Mineral and Energy Resources Engineers
- Publisher(Ko) :한국자원공학회
- Journal Title :Journal of the Korean Society of Mineral and Energy Resources Engineers
- Journal Title(Ko) :한국자원공학회지
- Volume : 50
- No :1
- Pages :98-112
- DOI :https://doi.org/10.12972/ksmer.2013.50.1.098
Journal of the Korean Society of Mineral and Energy Resources Engineers
