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http://dx.doi.org/10.7782/JKSR.2014.17.1.43

Dynamic Properties for Geomaterials of Railway as Determined by Large-scale Cyclic Triaxial Test  

Lee, Sung Jin (High-speed Railroad Systems Research Center, Korea Railroad Research Institute)
Hwang, Su Beom (High-speed Railroad Systems Research Center, Korea Railroad Research Institute)
Lee, Su Hyung (Metropolitan Transportation Research Center, Korea Railroad Research Institute)
Lee, Seong Hyeok (High-speed Railroad Systems Research Center, Korea Railroad Research Institute)
Kim, Ki Jae (High-speed Railroad Systems Research Center, Korea Railroad Research Institute)
Publication Information
Journal of the Korean Society for Railway / v.17, no.1, 2014 , pp. 43-51 More about this Journal
Abstract
In the earth structures of railways, large coarse granular materials are widely used as fill materials. However, experimental studies that consider the dynamic properties of these coarse granular materials have rarely been carried out in Korea due to the lack of a large scale test apparatus in this country. In this study, large scale cyclic triaxial tests were carried out for materials such as reinforced roadbed (subballast, graded crushed stone), transition zone gravel, and the upper subgrade of a railway. These specimens were prepared according to certain conditions (dry unit weight, grain size distribution, and so on) specified in the Korea railroad design standard. Based on these large triaxial test results, normalized shear modulus and damping ratio curves according to small strain level are suggested. A model and coefficients for each material are also proposed.
Keywords
Coarse granular material; Roadbed; Shear modulus; Damping ratio; Large triaxial test;
Citations & Related Records
Times Cited By KSCI : 5  (Citation Analysis)
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