| 摘要 |
PROBLEM TO BE SOLVED: To provide a damage detection method for a floor slab of a bridge capable of performing a detecting operation with less labor and reducing both time and cost required for the detecting operation. SOLUTION: An infrared thermomotive image on the surface of a pavement 3 on a steel floor slab 1 is acquired from a road surface measuring vehicle running on the pavement 3 using an infrared thermal image camera. Based on the infrared thermomotive image, the structure of the steel floor slab 1 is obtained by detecting the trough 4 of the steel floor slab 1. From the low temperature zone of the infrared thermomotive image among the zone thereof corresponding to the trough 4, and the rectangular low temperature zone thereof surrounding that zone, the bearing of water is detected on the inside of a predetermined trough member and an enclosed diaphragm 42. A penetrating crack is detected in a deck plate 2 corresponding to the trough 4 in which the bearing of water is detected. COPYRIGHT: (C)2011,JPO&INPIT
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