Location
University of Leeds
Keywords
wheel-tracking test, fatigue, RC slab, ultrasonic tomography, micro cracks
Abstract
There have been reports of road bridges that deteriorated after their RC slabs had been repaired. The insufficient removal of damaged materials is said to be the cause of such post-repair deterioration. Consequently, there is a call for a survey method that can detect deteriorated materials of bridges with high accuracy. Towards the development of such a method, this report focuses on ultrasonic tomography, because it can detect damage to the RC slabs of road bridges over relatively large areas. We examined the applicability of ultrasonic tomography to a method of assessing the RC slab damage by a test that uses a full-scale RC slab specimen that had been deteriorated by repeated loading on a wheel-tracking test machine. The results show that ultrasonic tomography is well able to detect areas of punching shear damage but not areas of horizontal cracking whose causes include both punching shear and compressive stress.
Included in
Damage Evaluation of Full-Scale RC Slab by Ultrasonic Tomography
University of Leeds
There have been reports of road bridges that deteriorated after their RC slabs had been repaired. The insufficient removal of damaged materials is said to be the cause of such post-repair deterioration. Consequently, there is a call for a survey method that can detect deteriorated materials of bridges with high accuracy. Towards the development of such a method, this report focuses on ultrasonic tomography, because it can detect damage to the RC slabs of road bridges over relatively large areas. We examined the applicability of ultrasonic tomography to a method of assessing the RC slab damage by a test that uses a full-scale RC slab specimen that had been deteriorated by repeated loading on a wheel-tracking test machine. The results show that ultrasonic tomography is well able to detect areas of punching shear damage but not areas of horizontal cracking whose causes include both punching shear and compressive stress.
