沥青混合料粘弹性连续损伤疲劳特性研究
发布时间：2019-06-03 15:08
【摘要】：沥青混合料具有粘弹性性,是道路工程中最为重要的建筑材料,由于混合料疲劳破坏是沥青路面最为严重的病害之一,路面的维修和养护对道路管理的压力越来越大。为提高沥青路面的使用寿命和性能,研究其自身的粘弹特性,转变以往路面以静态模量为基础的设计理论,对于沥青路面结构设计及其动态力学响应有着重要的意义。本文利用简单性能试验仪(SPT)首先对AC-13、炭黑改性AC-13两种沥青混合料进行了动态模量试验,利用Origin数值分析软件进行非线性拟合,确定出动态模量和相位角主曲线,获取粘弹性动态参数,分析了两种混合料的粘弹性能以及外掺炭黑对沥青混合料粘弹性的影响。然后,对AC-13、AC-16和AC-20等三种不同级配的沥青混合料在不同温度、不同频率条件下也进行了动态模量试验,确定主曲线,进行了对比分析。最后,对粘弹性本构方程模型中的基本粘弹性参数进行分析,在其本构方程的基础上,根据弹性-粘弹性对等原理把Schapery的粘弹性理论简单化,进而得到线粘弹性本构方程。在此基础上,结合连续损伤理论入手,提出了一种基于粘弹性连续损伤理论的新疲劳试验方法,构建线粘弹性连续损伤理论模型,建立起损伤程度和有效劲度的关系,最后得出混合料疲劳寿命方程。
[Abstract]:Asphalt mixture is the most important building material in road engineering because of its viscous elasticity. Because the fatigue failure of asphalt pavement is one of the most serious diseases, the pressure of pavement maintenance and maintenance on road management is increasing. In order to improve the service life and performance of asphalt pavement, study its own Viscoelastic characteristics, and change the previous design theory based on static modulus, it is of great significance for the structural design and dynamic mechanical response of asphalt pavement. In this paper, the dynamic modulus test of AC-13, carbon black modified AC-13 asphalt mixture is carried out by using the simple performance tester (SPT). The nonlinear fitting is carried out by using Origin numerical analysis software, and the main curves of dynamic modulus and phase angle are determined. The Viscoelastic properties of the two mixtures and the effect of carbon black on the viscosity of asphalt mixture are analyzed by obtaining the dynamic parameters of elasticity. Then, the dynamic modulus tests of three different gradation asphalt mixtures, such as AC-13,AC-16 and AC-20, under different temperature and frequency conditions, are carried out, the main curve is determined, and the comparative analysis is carried out. Finally, the basic Viscoelastic parameters in the Viscoelastic Constitutive equation Model are analyzed. On the basis of its Constitutive equation, the Viscoelastic Theory of Schapery is simplified according to the elastic-Viscoelastic equivalence principle, and then the linear Viscoelastic Constitutive equation is obtained. On this basis, combined with the continuous damage theory, a new fatigue test method based on the Viscoelastic continuous damage theory is proposed. The linear Viscoelastic continuous damage theoretical model is constructed, and the relationship between the damage degree and the effective stiffness is established. Finally, the fatigue life equation of the mixture is obtained.
【学位授予单位】：长安大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：U414
本文编号：2492019
[Abstract]:Asphalt mixture is the most important building material in road engineering because of its viscous elasticity. Because the fatigue failure of asphalt pavement is one of the most serious diseases, the pressure of pavement maintenance and maintenance on road management is increasing. In order to improve the service life and performance of asphalt pavement, study its own Viscoelastic characteristics, and change the previous design theory based on static modulus, it is of great significance for the structural design and dynamic mechanical response of asphalt pavement. In this paper, the dynamic modulus test of AC-13, carbon black modified AC-13 asphalt mixture is carried out by using the simple performance tester (SPT). The nonlinear fitting is carried out by using Origin numerical analysis software, and the main curves of dynamic modulus and phase angle are determined. The Viscoelastic properties of the two mixtures and the effect of carbon black on the viscosity of asphalt mixture are analyzed by obtaining the dynamic parameters of elasticity. Then, the dynamic modulus tests of three different gradation asphalt mixtures, such as AC-13,AC-16 and AC-20, under different temperature and frequency conditions, are carried out, the main curve is determined, and the comparative analysis is carried out. Finally, the basic Viscoelastic parameters in the Viscoelastic Constitutive equation Model are analyzed. On the basis of its Constitutive equation, the Viscoelastic Theory of Schapery is simplified according to the elastic-Viscoelastic equivalence principle, and then the linear Viscoelastic Constitutive equation is obtained. On this basis, combined with the continuous damage theory, a new fatigue test method based on the Viscoelastic continuous damage theory is proposed. The linear Viscoelastic continuous damage theoretical model is constructed, and the relationship between the damage degree and the effective stiffness is established. Finally, the fatigue life equation of the mixture is obtained.
【学位授予单位】：长安大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：U414
【参考文献】
相关期刊论文 前3条
1 葛折圣,黄晓明;运用损伤力学理论预测沥青混合料的疲劳性能[J];交通运输工程学报;2003年01期
2 耿立涛;杨新龙;任瑞波;王立志;;稳定型橡胶改性沥青混合料动态模量预估[J];建筑材料学报;2013年04期
3 吴旷怀;杨国良;张肖宁;;考虑松弛的沥青混合料疲劳损伤累计模型研究[J];深圳大学学报(理工版);2008年04期
相关博士学位论文 前1条
1 关宏信;沥青混合料粘弹性疲劳损伤模型研究[D];中南大学;2005年
，本文编号：2492019
本文链接：https://www.wllwen.com/kejilunwen/daoluqiaoliang/2492019.html
