Along with the popularization and application of the steel bridge in China,due to the high modulus of asphalt concrete with good waterproof,anti-fatigue,anti-aging and good performance,asphalt concrete with high modul...Along with the popularization and application of the steel bridge in China,due to the high modulus of asphalt concrete with good waterproof,anti-fatigue,anti-aging and good performance,asphalt concrete with high modulus was widely used in steel bridge deck pavement,the test and comparative study of high modulus asphalt concrete were carried out based on two types of common high modulus asphalt concrete which include the casting type asphalt concrete and epoxy resin modified asphalt concrete,aims to further explore the performance features of the steel bridge deck with high modulus asphalt concrete,and provide help on the application of this asphalt concrete on the steel bridge deck.展开更多
In order to investigate the fatigue performance of French high modulus asphalt concrete and the correlation between Burger's parameters and fatigue life, the virtual model of asphalt mixture trapezoidal specimen i...In order to investigate the fatigue performance of French high modulus asphalt concrete and the correlation between Burger's parameters and fatigue life, the virtual model of asphalt mixture trapezoidal specimen in the two-point bending fatigue test was constructed in discrement element software PFC3D. The initial stiffness and the maximum stress when the specimen reached fatigue were calculated. Through the comparison between virtual and single field fatigue test curves, the credibility of simulation in DEMwas verified.Then, the impacts of top controlled displacement and Burger's parameters( E_1,E_2,η_1,η_2) on the fatigue life of the specimen were explored. The simulation results indicate that the maximum stress increases with the increase in the top controlled displacement. With the increase of E_1 and the decrease of E_2 in Burger's model, the modulus of the asphalt binder increases, and the fatigue performance of the asphalt mixture enhances. η_1 and η_2 have limited influence on fatigue life compared with E_1 and E_2.展开更多
文摘Along with the popularization and application of the steel bridge in China,due to the high modulus of asphalt concrete with good waterproof,anti-fatigue,anti-aging and good performance,asphalt concrete with high modulus was widely used in steel bridge deck pavement,the test and comparative study of high modulus asphalt concrete were carried out based on two types of common high modulus asphalt concrete which include the casting type asphalt concrete and epoxy resin modified asphalt concrete,aims to further explore the performance features of the steel bridge deck with high modulus asphalt concrete,and provide help on the application of this asphalt concrete on the steel bridge deck.
基金The National Natural Science Foundation of China(No.51378121)
文摘In order to investigate the fatigue performance of French high modulus asphalt concrete and the correlation between Burger's parameters and fatigue life, the virtual model of asphalt mixture trapezoidal specimen in the two-point bending fatigue test was constructed in discrement element software PFC3D. The initial stiffness and the maximum stress when the specimen reached fatigue were calculated. Through the comparison between virtual and single field fatigue test curves, the credibility of simulation in DEMwas verified.Then, the impacts of top controlled displacement and Burger's parameters( E_1,E_2,η_1,η_2) on the fatigue life of the specimen were explored. The simulation results indicate that the maximum stress increases with the increase in the top controlled displacement. With the increase of E_1 and the decrease of E_2 in Burger's model, the modulus of the asphalt binder increases, and the fatigue performance of the asphalt mixture enhances. η_1 and η_2 have limited influence on fatigue life compared with E_1 and E_2.
