DYNAMIC RESPONSE OF LONGITUDINAL CRACK IN PAVEMENT ON THE ORTHOTROPIC STEEL DECK

摘要

In this paper, propagation of the longitudinal crack in the steel deck pavement was studied with the theory of dynamic mechanics and linear elastic fracture mechanics, using the 3d FEM method. The dynamic loadings was simplified as half-sine distributed function, meanwhile the paper also discussed the influences of different factors on the stress intensity factor(SIF), such as different loading cycles, elastic modulus, crack length and hydraulic pressure in the crack. The results show that SIF increases first and then decreases with the increment of loading cycle and crack length, while decreases monotonously with the increase of pavement modulus.