Fatigue life analysis of steel–concrete composite bridge considering road surface conditions
Tóm tắt
Road surface roughness affects the dynamic interaction between vehicle and bridge. Dynamic impact in the bridge due to vehicle is more if the road surface condition in the bridge is poor. This paper presents a detailed analysis of a composite steel–concrete bridge for its fatigue life due to road surface conditions. The analysis includes a model that takes into account the dynamic impact of vehicles on bridges and the stresses induced in the bridge girder affected by road surface conditions in the bridge deck. Finite element modeling of both vehicle and bridge is done in ANSYS APDL and vehicle bridge interaction analysis is carried out. The fatigue life is calculated using Linear Elastic Fracture Mechanics approach which considers crack size information that is measurable in field using non-destructive tests. The results are presented to show the effect of good, average and poor road surface condition on the bridge’s fatigue life. Numerical results show that the bridge with poor road surface condition has low fatigue life compared to bridge with good road surface condition.
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