关键词: 裂缝, 应力强度因子, 有限元, 桥面铺装

Abstract: Based on fracture mechanics, the crack propagation model was established with the finite element method. When bridge deck pavement repaving was conducted, the effect of pavement cracks on the over lay was analyzed in terms of stress intensity factor. The influence of cracks of different widths and different overlay thickness on the over lay crack propagation under the load and temperature stress was studied. Through the study, it was indicated that low temperaturew as the majo r factor for crack propagation. The thicker the overlay, the smaller the stress intensity factor of crack tip. A higher crack re??sistance was in need for ultra-thin bridge deck pavements

Key words: crack, stress intensity factor, finite element, bridge deck pavement