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纤维沥青混凝土FRA黏弹性预测模型
Viscoelastic prediction model of fiber reinforced asphalt concrete- FRA
投稿时间:2017-08-31  修订日期:2017-10-09
DOI:
中文关键词:  纤维增强沥青混凝土(FRA)  黏弹性行为  三参数固体模型  松弛模量  蠕变柔量
英文关键词:Fiber reinforced asphalt concrete  Viscoelastic behaviour  Three parameter solid model  Relaxation modulus  Creep compliance
基金项目:国家重点研发计划重点专项(2016YFB0303103),江苏省基础研究计划项目(BK20171254),南通市应用基础研究项目(GY12016049),江苏省大学生创新训练计划项目(201710304037Z)
作者单位E-mail
徐勋倩 南通大学 xunqian_xu@163.com 
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中文摘要:
      纤维沥青混凝土 (Fiber reinforced asphalt concrete- FRA)的力学行为取决于沥青混合料和纤维的物理属性及几何特征。通过三参数固体模型,考虑纤维的几何特性,构造了一种预测FRA黏弹性行为模型,推导出该模型的本构方程与蠕变柔量和松弛模量表达式。采用该模型,研究了纤维体积分、比半径和弹性模量等对FRA松弛模量和蠕变柔量的影响。研究认为,纤维掺入量、比半径对FRA的松弛模量和蠕变柔量影响较大,而弹性模量影响较小。通过试验,验证了FRA预测模型具有较高的精度。在研究试验范围内,SMA-13沥青混凝土的聚丙烯晴纤维(PAN)最佳掺入量、长径比分别为0.3-0.4%、600-900。
英文摘要:
      The mechanical behavior of fiber reinforced asphalt concrete- (FRA) depends on the physical and geometrical characteristics of the asphalt mixture and fiber. Considering the geometric characteristics of the fiber, a model for predicting the viscoelastic behavior of FRA was constructed through the three parameter solid model. Using this model, the effects of fiber volume integral, specific radius and elastic modulus on FRA relaxation modulus and creep compliance were investigated. The results shew that the fiber’s content and specific radius have great influence on the relaxation modulus and creep compliance of FRA. While, the fiber’s elasticity modulus has less affected on them. Through experiments, it was proved that the FRA prediction model had higher precision. In the range of test and research, the optimum blending ratio and length diameter ratio of polypropylene fiber (PAN) for SMA-13 asphalt concrete were 0.3-0.4% and 600-900 respectively.
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