Abstract
To observe the behaviour and resistance of steel bridges with the orthotropic plate decks, the nonlinear finite probabilistic model in the ANSYS software environment was developed using software support module PDS. Random variables were described by means of parameters of probability density function according to data determined experimentally. The model takes also into account the geometrical and material nonlinearities of the structure. The major aim of the paper is to obtain the corrosion effects influence on the resistance of this structural system. Therefore the time variant loss of member resistance was computed based on selected corrosion models.
Highlights
Stiffened plated structural elements are the main and very important parts of the box girder bridge structures or the bridge structures with ballast bed
An adequate probabilistic model of the ultimate strength is necessary to develop for structural reliability assessment of those types of structures due to significant uncertainties of the initial performance, effects of deterioration and because of the stochastic nature of all factors affecting the resistance
The effort was focused on the determination of stress state of compression orthotropic decks creating the upper flanges of bridges with ballast beds
Summary
Stiffened plated structural elements are the main and very important parts of the box girder bridge structures or the bridge structures with ballast bed. Their structural integrity has direct implications on the safety and reliability. Limited available resources, incorrect maintenance decisions and many quality corrosion protection systems are available at present, phenomena of corrosion as the basic and most important degradation effect is significant all the time. Effects of this degradation cause material loss leading to the reduction of structural resistance. The parametric study of simulation of corrosion effect was realized to observe the variation of the bridge ultimate strength within the bridge service lifetime resulting from the generalized corrosion of the bridge stiffened deck plate
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