劣化した港湾コンクリート構造物の非破壊検査法としてのAE計測の適用性に関する基礎的研究

抄録

The history of Japanese port and harbor construction by the use of concrete materials has more than five decades, and such a lot of concrete structures have been constructed and are in service. In order to keep these concrete structures in good service condition, a rational maintenance system is necessary. As a part of maintenance procedures, nondestructive testing of existing structures play very important roles. Considering such social and technical background, an experimental study on the application of AE (Acoustic Emission) technique as a nondestructive testing to deteriorated port and harbor concrete structures are carried out. From this experimental work, the following conclusions are derived.
1) Acoustic emission behaviors of concrete under uniaxial compression are strongly related to the pore structure of the concrete.
2) Acoustic emission behaviors of reinforced concrete beams under bending are related to the crack condition of concrete, even under low level bending moment.