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[VI-916] A Basic Study on Acoustic Characteristics in Hammering Test for Track Slab by Acoustic-Structural Coupled Analysis

〇Kohko Inaba¹, Takatada Takahashi¹, Yoshitsugu Momoya¹ (1.Railway Technical Research Institute)

Keywords:slab track, filling layer, Cement-Asphalt mortar, hammering test, Acoustic-structural coupled analysis, frost damage

It has been reported that frost damage of filling layer for slab track used in shinkansen et al causes wedge-shaped defect (gap) between filling layer and track slab. In previous studies, hammering test has examined in order to detect such defects. However, relationship between hammering characteristics (frequency and damping characteristics) and defective condition has not been explained. Therefore, we considered this relationship using acoustic-structural coupled alanysis.