ABSTRACT
The uncertainties of the design, execution and maintenance are clearly revealed in the increase of the dynamic impact on the structures. In the maintenance of the bridges we can observe that each factors are relevance on the total value impact dynamic projected or expected. Knowing each percentage of importance, facilitates the process of maintenance of each responsible area, this was initially done intuitively to be able to locate where the trigger of the problem was. Theoretically we lack parameters to obtain the variables that allow us to use an adequate analysis of reliability. However, it was necessary to approach the problem experimentally, by assembling a known vehicle, on a bridge, track and instrumented vehicle, isolating known defect patterns, to be able to measure the relevance of each variable within the dynamic amplification. This global instrumentation project is certainly the first instrumentation in Brazil, isolating defects of the vehicle, track and bridge, more interestingly, the whole company managed to work together with a common purpose that was the efficient maintenance of bridges. We obtained the importance of each parameter, final coefficient of experimental dynamic impact measured for each bridge, with the transmissibility levels of each transition zone of the system. It was also obtained the reduction that each parameter is responsibility in the total residual life of the structure, being able to convert this into monetary numbers and a more real decision making.
