Akademik Veri Yönetim Sistemi
6th International Conference on Bridge Maintenance, Safety and Management (IABMAS), Stresa, İtalya, 8 - 12 Temmuz 2012, ss.2128-2135, (Tam Metin Bildiri)
A Structural Health Monitoring (SHM) system was installed on the Bosphorus Bridge in Istanbul in 2009. This Paper discusses the practical applications of strain gauge data from the orthotropic steel deck and how this data can be used to assess the residual fatigue life on the deck. The complex geometry of many fatigue sensitive details and uncertainties regarding the actual application of loading (a problem that is compounded by the cube rule relationship of fatigue stresses) means that there is still considerable difficultly in analytically predicting the fatigue life of new and existing structures. It is likely that the in-service performance of major bridge crossings will continue to be significantly hampered by the onset of fatigue damage; therefore it is critically important to understand the reduction in fatigue life in a structure and whether the predicted effects match the actual effects. Furthermore, knowledge of the likely occurrence of damage will influence inspection requirements - favourably if the predictions are higher than the actual stresses. For existing structures, where the fatigue design may be based on wholly inappropriate standards, knowledge of the actual performance is extremely useful in planning the future maintenance requirements of the structure.