This study presents a practical approach for imaging concrete pavement and bridge deck slabs for the presence of delamination defects. Air-coupled impact resonance (i.e. impact-echo) test data are presented as a fused image using stacked spectral C-scans of the tested deck surface. The low frequency (less than 6 kHz) dynamic vibrational response of delamination defects, principally caused by the behavior of flexural vibration modes, clearly and accurately reveals the presence of internal shallow delamination defects. Images are constructed with data from air-coupled impact resonance tests carried out on laboratory and field concrete deck samples and an in-service concrete bridge deck.

• 이동률(인천대학교 안전공학과 석사과정) | Lee, Dong Ryul
• 한대희(인천대학교 안전공학과 석사과정) | Han, Dae Hee
• 존 포포빅스(University of Illinois, 토목공학과, 부교수) | John. S. Popovics
• 오태근(인천대학교 안전공학과 교수, 공학박사) | Oh, Tae Keun 교신저자