Chapter 27
Evaluation of Fatigue Damage in RC
Slabs Considering Water Infiltration
by Means of 3D AE and Elastic Wave
Tomography
H. Asaue, T. Shiotani, S. Fukumoto, and T. Maeshima
Abstract To maintain civil engineering infrastructures reasonably, proper maintenance programs shall be implemented before remarkable damage/deterioration. As
for RC slabs of road bridges, an evolutional process of fatigue damage shall be
studied to establish the proper maintenance program. The authors have enthusiastically studied the mechanism of fatigue failure of the RC slabs; however, there is still
space to clarify internal fatigue damage progress in consideration of water infiltration.
In the study, to know the fatigue failure mechanism of RC decks in consideration of
water infiltration, a wheel loading test of the RC slab filled with water on the surface
is conducted systematically. Numerous numbers of repetition of the wheel load are
conducted by several loads’ step and after each designated cycle e.g., 100, 200 and
250 k cycles, the specimen is subject to static load with monitoring AE activity. With
using AE activity namely AE sources located, 3D AE tomography is implemented
to identify the damage with elastic wave velocity distributions (tomogram). Based
on the tomograms obtained each loads’ step, failure mechanisms in consideration
of water infiltration is discussed in comparison with the cases without infiltration.
Through the study, very unique failure progress, being different from dry condition,
which expands from first-introduced cracks comes to light.
H. Asaue (B) · T. Shiotani
Graduate School of Engineering, Kyoto University, C3-b4S15, Katsura Campus, Nishikyo-Ku,
Kyoto 615-8540, Japan
e-mail: asaue.hisafumi.7a@kyoto-u.ac.jp
S. Fukumoto
IHI Inspection and Instrumentation Co., Ltd., 2-6-17, Fukuura kanazawa-ku, Yokohama,
Kanagawa, Japan
T. Maeshima
College of Engineering, Nihon University, 1, Nakagawara Tokusada Tamuramachi, Koriyama,
Fukushima, Japan
© The Author(s), under exclusive license to Springer Nature Singapore Pte Ltd. 2021
G. Shen et al. (eds.), Advances in Acoustic Emission Technology, Springer Proceedings
in Physics 259, https://doi.org/10.1007/978-981-15-9837-1_27
325
Evaluation of Fatigue Damage in RC
Slabs Considering Water Infiltration
by Means of 3D AE and Elastic Wave
Tomography
H. Asaue, T. Shiotani, S. Fukumoto, and T. Maeshima
Abstract To maintain civil engineering infrastructures reasonably, proper maintenance programs shall be implemented before remarkable damage/deterioration. As
for RC slabs of road bridges, an evolutional process of fatigue damage shall be
studied to establish the proper maintenance program. The authors have enthusiastically studied the mechanism of fatigue failure of the RC slabs; however, there is still
space to clarify internal fatigue damage progress in consideration of water infiltration.
In the study, to know the fatigue failure mechanism of RC decks in consideration of
water infiltration, a wheel loading test of the RC slab filled with water on the surface
is conducted systematically. Numerous numbers of repetition of the wheel load are
conducted by several loads’ step and after each designated cycle e.g., 100, 200 and
250 k cycles, the specimen is subject to static load with monitoring AE activity. With
using AE activity namely AE sources located, 3D AE tomography is implemented
to identify the damage with elastic wave velocity distributions (tomogram). Based
on the tomograms obtained each loads’ step, failure mechanisms in consideration
of water infiltration is discussed in comparison with the cases without infiltration.
Through the study, very unique failure progress, being different from dry condition,
which expands from first-introduced cracks comes to light.
H. Asaue (B) · T. Shiotani
Graduate School of Engineering, Kyoto University, C3-b4S15, Katsura Campus, Nishikyo-Ku,
Kyoto 615-8540, Japan
e-mail: asaue.hisafumi.7a@kyoto-u.ac.jp
S. Fukumoto
IHI Inspection and Instrumentation Co., Ltd., 2-6-17, Fukuura kanazawa-ku, Yokohama,
Kanagawa, Japan
T. Maeshima
College of Engineering, Nihon University, 1, Nakagawara Tokusada Tamuramachi, Koriyama,
Fukushima, Japan
© The Author(s), under exclusive license to Springer Nature Singapore Pte Ltd. 2021
G. Shen et al. (eds.), Advances in Acoustic Emission Technology, Springer Proceedings
in Physics 259, https://doi.org/10.1007/978-981-15-9837-1_27
325