VISCO-ELASTOPLASTIC FINITE ELEMENT ANALYSIS ON THE DEFORMATION OF ASPHALT MIXTURES
Numerical simulation for deformation of asphalt mixtures under static creep tests is carried out via visco-elastoplastic finite element method based on linear Drucker-Prager creep model with Drucker-Prager yield condition and time-hardening form of power law model. The creep model is then found as a proper description of creep properties of asphalt mixtures with lately appearing tertiary flow stage by comparing the consistency of analytical solution and finite element solution on static creep tests of AC13C unmodified and modified asphalt mixtures. Creep strain of asphalt mixtures increases with loading time. Strain increasing rate is larger at initial period and smaller at later period. If asphalt mixtures yielded, then irrecoverable and timeindependent plastic strain occurred. When asphalt mixtures do not reach yielding, then only creep strain is occurred. Permanent strain of asphalt mixtures is composed of creep strain and plastic strain. The results show that linear Drucker-Prager creep model could well predict permanent deformation of asphalt mixtures. Furthermore it can be used to study the anti-rutting performance of asphalt mixtures.
asphalt miztures deformation finite element analysis visco-elastoplastic
Li-Juan Zhang Xiao-Ning Zhang Ye-Kai Chen
School of Civil Engineering and Transportation, South China University of Technology,Guangzhou 51064 School of Civil Engineering and Transportation, South China University of Technology, Guangzhou 5106
国际会议
广州
英文
222-227
2009-11-28（万方平台首次上网日期，不代表论文的发表时间）