15. Supplementary Notes Supported by a grant from the U.S. Department of Transportation, University Transportation Centers Program 16. Abstract Inspections of bridge substructures in Texas identified surface deterioration of reinforced concrete columns on bridges continuously exposed water. Initial hypothesis were that the surface deterioration was a result of the acidity of the water in which ...

One of the main causes of a limited use of nondestructive evaluation (NDE) technologies in bridge deck assessment is the speed of data collection and analysis. The paper describes development and implementation of the RABIT (Robotics Assisted Bridge Inspection Tool) for data collection using multiple NDE technologies. The system is designed to characterize three most common deterioration types ...

Delamination is probably the most serious form of deterioration I which is commonly found in britlge decks. It ultimately results in large scale spalling necessitating costly repairs. This type of failure is believed to be caused chiefly from salt induced corrosion of the reinforcing steel. An instrument designed to detect delamination, and tests conducted to val:iAate its perf'ormance, are .br...

This paper aims to develop a deteriorated bridge maintenance strategy that ensures the safe operation of steel structures and minimizes total risk. Five common failure modes are considered for bridge: flexure, shear, deflection, fatigue girder, chloride attack concrete deck. Time-dependent system reliability analyses carried out find probability under these modes. Risk-cost optimization is then...

This paper introduces the outline of a bridge management strategy based on the prediction of future bridge reliability using a semi-Markov deterioration model. This approach applies equally well to single bridges and to a whole network, and is expected to be implemented in the Bridge Management System (BMS) of the Autonomous Province of Trento (APT). More in detail, the model assumes the lifesp...