Place & Date: Berlin, Germany , September 2004
Conference: 26th European Conference on Acoustic Emission Testing
Title: Damage assessment in railway sub-structures deteriorated using AE technique
Authors: Tomoki Shiotani*, Yasuhiro Nakanishi*, Xiu Luo** and Hiroshi Haya**
*Research Institute of Technology, Tobishima Corporation, Japan
**Railway Technical Research Institute, Japan
ABSTRACT
Due to earthquakes, differential settlement and long-term weathering, civil structures have sustained deterioration. In super-structures located above ground, except for seriously damaged structures, evaluation of moderately or intermediately damaged structures is difficult. In sub-structures the damage would not be readily assessed even for severely damaged structures. AE testing has a potential to evaluate thus damages not only for super-structures but sub-structures since it is a monitoring technique to detect fracture-associated elastic waves. In the present paper, damage indices using AE activity is discussed with actually damaged concrete piers. Railway traffic is utilized to induce AE activity. Through in-situ monitoring, it can be concluded that AE monitoring is a promising technique to quantify the damages in the railway structures.

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