瀝青混合料粘彈性連續(xù)損傷疲勞特性研究
發(fā)布時間：2019-06-03 15:08
【摘要】：瀝青混合料具有粘彈性性,是道路工程中最為重要的建筑材料,由于混合料疲勞破壞是瀝青路面最為嚴(yán)重的病害之一,路面的維修和養(yǎng)護(hù)對道路管理的壓力越來越大。為提高瀝青路面的使用壽命和性能,研究其自身的粘彈特性,轉(zhuǎn)變以往路面以靜態(tài)模量為基礎(chǔ)的設(shè)計理論,對于瀝青路面結(jié)構(gòu)設(shè)計及其動態(tài)力學(xué)響應(yīng)有著重要的意義。本文利用簡單性能試驗儀(SPT)首先對AC-13、炭黑改性AC-13兩種瀝青混合料進(jìn)行了動態(tài)模量試驗,利用Origin數(shù)值分析軟件進(jìn)行非線性擬合,確定出動態(tài)模量和相位角主曲線,獲取粘彈性動態(tài)參數(shù),分析了兩種混合料的粘彈性能以及外摻炭黑對瀝青混合料粘彈性的影響。然后,對AC-13、AC-16和AC-20等三種不同級配的瀝青混合料在不同溫度、不同頻率條件下也進(jìn)行了動態(tài)模量試驗,確定主曲線,進(jìn)行了對比分析。最后,對粘彈性本構(gòu)方程模型中的基本粘彈性參數(shù)進(jìn)行分析,在其本構(gòu)方程的基礎(chǔ)上,根據(jù)彈性-粘彈性對等原理把Schapery的粘彈性理論簡單化,進(jìn)而得到線粘彈性本構(gòu)方程。在此基礎(chǔ)上,結(jié)合連續(xù)損傷理論入手,提出了一種基于粘彈性連續(xù)損傷理論的新疲勞試驗方法,構(gòu)建線粘彈性連續(xù)損傷理論模型,建立起損傷程度和有效勁度的關(guān)系,最后得出混合料疲勞壽命方程。
[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.
【學(xué)位授予單位】：長安大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2015
【分類號】：U414
本文編號：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.
【學(xué)位授予單位】：長安大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2015
【分類號】：U414
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，本文編號：2492019
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