Fusion of NDE Scanning and Photogrammetric Data for Concrete Bridge Decks and Girders Condition Assessment

The first case history presents 3-D results of Impact Echo (IES) and Ground Penetrating Radar (GPR) scanning plus Spectral Analyses of Surface Waves (SASW) tests of post-tensioned concrete bridge girders. The NDE results were overlaid on photogrammetric images of visible corrosion/cracking damage to the concrete bridge girders of an aging bridge due to de-icing salts and a marine environment. Cart-based scanning results from GPR and Impact Echo are presented next for a bare concrete deck to map both top and bottom delaminations and depth of concrete cover. The nondestructive evaluation (NDE) results are overlaid on photogrammetric images of the bare concrete deck to visibly compare areas of spalling, delamination and deck patching for improved interpretation, visualization and mapping of internal deck delaminations and other concrete damage. The NDE and photogrammetric data fusion approach combine to provide more accurate surface and full-depth images of bridge deck conditions for repair designs. © 2022 The Authors.