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铁道科学与工程学报

JOURNAL OF RAILWAY SCIENCE AND ENGINEERING

第12卷    第5期    总第68期    2015年10月

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文章编号:1672-7029(2015)05-1083-05
水泥乳化沥青砂浆蠕变试验数据处理及其数值仿真
魏贤奎1,刘浩2,徐浩3,王平2

(1.川南城际铁路有限责任公司,四川自贡 643000;
2.西南交通大学高速铁路线路工程教育部重点实验室,四川成都 610031;
3.中铁二院工程集团有限责任公司,四川成都 610031
)

摘 要: 为获得水泥乳化沥青砂浆(CA砂浆)黏弹性本构关系,并利用这种本构关系进行各种数值计算,结合CA砂浆单轴静载压缩蠕变试验数据,对蠕变变形进行拟合,得到了由Burgers模型表示的黏弹性参数。针对ANSYS有限元软件的计算要求,推导了将Burgers模型参数转化为Prony级数的计算公式,并采用ANSYS软件进行数值计算。计算结果表明:Burgers模型的拟合相对误差小于1.7%,能较好地反映CA砂浆的蠕变特性;利用Prony级数方法得到的计算结果与试验结果的误差在2.5%以下;Prony级数的转化公式方法简单,计算准确。

 

关键字: CA砂浆;蠕变试验;黏弹性;Burgers模型;Prony级数

Data processing and numerical simulation for creep testof cement emulsified asphalt mortar
WEI Xiankui1, LIU Hao2, XU Hao3,WANG Ping2

1. South of Sichuan Inter-city Railway Co., LTD, Chengdu 610031, China;
2. MOE Key Laboratory of High-Speed Railway Engineering, Southwest Jiaotong University, Chengdu 610031, China;
3. China Railway Eryuan Engineering Group Co. Ltd, Chengdu 610031, China

Abstract:The viscoelastic constitutive relation of cement asphalt mortar (CA mortar) is obtained and then appied easily into numerical simulations. Creep deformation is fitted through analyzing creep data acquired in uniaxial static compressive creep test of CA mortar. Thus viscoelastic parameters of Burgers model are obtained.Based on the requirement of ANSYS finite element software, an algorithm is deduced to transform the constitutive equations of Burgers model parameters into Prony series, and the numerical calculation is carried out by ANSYS software. The calculation results show that the relative error of Burgers model is less than 1.7%, which can reflect the creep performance of CA mortar well. The solution error of Prony series is no more than 2.5% compared with the test result. The transformation formula to Prony series is simple and efficient.

 

Key words: cement asphalt mortar; creep test; viscoelasticity; Burgers model; Prony series

ISSN 1672-7029
CN 43-1423/U

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