Viscoelastic Parameters of Asphalt Concrete with a Modified Burgers Model
Viscoelasticity is an important characteristic of gussasphalt mixtures.The aim of this study is to find the correct viscoelastic material parameters of the novel gussasphalt applied in the 4th Yangtze River Bridge based on the modified Burgers model.This study firstly derives the explicit Prony series form of the shear relaxation modulus of viscoelastic material by Laplace transformation, to fulfill the parameter inputting requirements of commonly used finite element software suites.Secondly, a kind of uniaxial penetration creep experiments on the gussasphalt mixtures is conducted.By fitting the creep compliance, the viscoelastic parameters characterized by the modified Burgers model are obtained.And thirdly, based on the viscoelastic test data of asphalt mixtures, the Prony series formula derived in this study is verified through the finite element simulation.The comparison results of the relative errors between the finite element simulation and the theoretical calculation confirm the reliability of the Prony series formulas deduced in this research.And finally, the method is appied to calcualte the real rutting of the pavement and the comparision of the results reveals that the proposed method is reliable.
Asphalt mixture Viscoelasticity Prony series Modified Burgers model Experiment simulation
Faxiang Xie Gao Xiang Ao Zhou
College of Civil and Transportation Engineering, Hohai University, Nanjing 210098, China
国际会议
福州
英文
297-305
2018-11-04（万方平台首次上网日期，不代表论文的发表时间）