个人信息Personal Information
副教授
硕士生导师
任职 : 辽宁省工程建设评标专家、辽宁省公路学会会员
性别:男
毕业院校:大连理工大学
学位:博士
所在单位:交通运输系
学科:道路与铁道工程. 市政工程
办公地点:大连理工大学 综合实验4号楼 534室
电子邮箱:liwo@dlut.edu.cn
Characterization of Triaxial Stress State Linear Viscoelastic Behavior of Asphalt Concrete
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论文类型:期刊论文
发表时间:2017-04-01
发表刊物:JOURNAL OF MATERIALS IN CIVIL ENGINEERING
收录刊物:SCIE、EI
卷号:29
期号:4
ISSN号:0899-1561
关键字:Complex modulus; Relaxation spectrum; Confining pressure; Master curve; Havriliak-Negami model
摘要:The present study proposed a new method for characterizing linear viscoelastic (LVE) properties of asphalt concrete (AC) under triaxial loading conditions. The presented method adopted the relaxation spectrum model derived from the Havriliak-Negami (HN) complex modulus model and an existing confining pressure-dependent equilibrium modulus model to simulate the triaxial complex modulus and relaxation modulus master curves. The confinement dependency of the triaxial master curves was considered in the relaxation spectrum and equilibrium modulus instead of the time-temperature shift factor. A confinement shift factor model was developed to incorporate the confinement dependency into the HN relaxation spectrum. The feasibility and effectiveness of the method were demonstrated by using the triaxial complex modulus test data sets of three different asphalt mixtures, and its advantages over existing methods were also discussed. The results showed that the method was able to accurately and completely characterize the triaxial LVE behavior of the mixtures in both frequency and time domains. Both the storage and loss moduli test data were simultaneously used during the determination of the model parameters. Thus, the LVE information in the experimental results was fully extracted and all the predicted triaxial master curves achieved relatively smaller deviations from the test data. (C) 2016 American Society of Civil Engineers.