Research of Method for Solving Relaxation Modulus Based on Three-Point Bending Creep Test

被引：7
|
作者：
Sun, Yazhen [1 ]
Gu, Zhangyi [2 ]
Wang, Jinchang [3 ]
Yuan, Xuezhong [4 ]
机构：
[1] Shenyang Jianzhu Univ, Sch Transportat Engn, Shenyang 110168, Liaoning, Peoples R China
[2] Zhejiang Univ, Coll Civil Engn & Architecture, Hangzhou 310058, Zhejiang, Peoples R China
[3] Zhejiang Univ, Inst Transportat Engn, Hangzhou 310058, Zhejiang, Peoples R China
[4] Shenyang Jianzhu Univ, Sch Sci, Shenyang 110168, Liaoning, Peoples R China
来源：
MATERIALS | 2019年 / 12卷 / 12期
关键词：
HVAS; transcendental equation; relaxation modulus; creep compliance; convolution; Newton's method; Boltzmann superposition principle; ASPHALT MIXTURES; TEMPERATURE; MODEL;
D O I：
10.3390/ma12122021
中图分类号：
O64 [物理化学（理论化学）、化学物理学];
学科分类号：
070304 ; 081704 ;
摘要：
A method was developed for solving the relaxation modulus of high viscosity asphalt sand (HVAS) based on the three-point bending creep test, and was verified by comparison with experimental results. In this method, firstly, a transcendental equation was obtained by the convolution, and then equations were obtained by Taylor's formula, which were solved by Mathmatica to obtain the relaxation modulus by Newton's method. Subsequently, the laboratory investigations of the viscoelastic parameters of the Burgers model for the HVAS by three-point bending creep tests were carried out. In addition, the method was verified by comparing the relaxation moduli with the indoor relaxation experiments. Results showed that the numerical calculation and the test data were in good agreement, and the relaxation characteristics of the HVAS were reflected more accurately. The method can be used to study the relaxation characteristics of the asphalt mixtures effectively. In addition, this study provides a research basis for road crack prevention.
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页数：14
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