1. School of Science, Xi'an University of Architecture and Technology, Xi'an Shaanxi 710055, China;
2. School of Civil Engineering, Xi'an University of Architecture and Technology, Xi'an Shaanxi 710055, China
New Statistical Damage Theory-based Creep Model for Asphalt Mixture
LIU Jun-qing1, LI Qian2, LI Hong-xiao1
1. School of Science, Xi'an University of Architecture and Technology, Xi'an Shaanxi 710055, China;
2. School of Civil Engineering, Xi'an University of Architecture and Technology, Xi'an Shaanxi 710055, China
摘要The modified Burgers model was considered as the series connection between a Van Der Pool model and a nonlinear dashpot to draw a conclusion that the process of damage evolution only results in a decrease in dashpot viscosity, whereas the other three elements are undamaged. A damage evolution equation was established from a statistical perspective with the distribution of the inner flaw of asphalt described by the Weibull function. The equation was then incorporated into the modified Burgers model to obtain a new viscoelastic damage model of the asphalt mixture. The creep strain, rate, and acceleration were obtained. These parameters exhibited good agreement with the three-phase creep character of the asphalt mixture. Finally, the proposed model was verified through two experimental examples. Results showed that the model considering the dashpot damage was not only simpler than the previous models, but also exhibited good agreement with the experimental result. Moreover, this method was based on a reasonable theory.
Abstract：The modified Burgers model was considered as the series connection between a Van Der Pool model and a nonlinear dashpot to draw a conclusion that the process of damage evolution only results in a decrease in dashpot viscosity, whereas the other three elements are undamaged. A damage evolution equation was established from a statistical perspective with the distribution of the inner flaw of asphalt described by the Weibull function. The equation was then incorporated into the modified Burgers model to obtain a new viscoelastic damage model of the asphalt mixture. The creep strain, rate, and acceleration were obtained. These parameters exhibited good agreement with the three-phase creep character of the asphalt mixture. Finally, the proposed model was verified through two experimental examples. Results showed that the model considering the dashpot damage was not only simpler than the previous models, but also exhibited good agreement with the experimental result. Moreover, this method was based on a reasonable theory.
基金资助:Supported by the National Natural Science Foundation of China (No.51178387)
通讯作者:
LIU Jun-qing, E-mail:liujunqingjd@126.com
E-mail: liujunqingjd@126.com
引用本文:
刘俊卿, 李倩, 李红孝. 基于统计损伤理论的沥青混合料的蠕变模型[J]. Journal of Highway and Transportation Research and Development, 2015, 9(1): 8-13.
LIU Jun-qing, LI Qian, LI Hong-xiao. New Statistical Damage Theory-based Creep Model for Asphalt Mixture. Journal of Highway and Transportation Research and Development, 2015, 9(1): 8-13.
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2015, Vol. 9 
