Development and Validation of Elastomeric Devices Supported Floating Slab Track Systems

초록

Floating slab track system is considered as a special track type for the second generation of the vibration reduction method due to its efficiency. To attenuate disturbance in stations located under railway lines, special types of track bedding have been designed, based on fixation of the rail on floating slabs, resting on rubber-spring type isolators. The KRS (Korea Rubber Spring) isolator, which was developed by KRRI (Korea Railroad Research Institute), used in this study is combining isolator consisting of spring type isolators and elastomeric bearings. They are based on the enhanced damping properties of a compound of natural rubber with addition of steel plates. Laboratory tests on rubber type isolators show the sufficient resistance against fatigue, vertical and lateral load. From the experimental results, it can be concluded that the introduction of KRS isolators can mitigate effectively dynamic vibrations. In addition, the effectiveness of KRS isolators has been verified for performances through analytical study.