【摘要】：目前我國(guó)瀝青路面半剛性基層材料主要是水硬性結(jié)合料處治的穩(wěn)定碎礫石基層材料,由于外界因素的影響以及筑路材料本身的特性,半剛性基層極易產(chǎn)生初始裂縫。基層一旦開裂,在交通荷載、溫濕度變化以及其他因素作用下,裂縫尖端產(chǎn)生應(yīng)力集中,導(dǎo)致裂縫向面層方向擴(kuò)展,進(jìn)而加速路面結(jié)構(gòu)的破壞進(jìn)程,嚴(yán)重影響瀝青路面結(jié)構(gòu)的長(zhǎng)期使用性能及使用壽命。因此,對(duì)半剛性基層反射裂縫的擴(kuò)展研究具有重要的理論意義和工程價(jià)值。對(duì)于半剛性基層反射裂縫擴(kuò)展的問題,既有研究大多只考慮了交通荷載的影響,也有少部分研究了溫度的影響,但對(duì)于交通荷載和溫度共同作用下的研究極少;另一方面,既有研究大多采用傳統(tǒng)有限元的數(shù)值模擬方法,此方法在計(jì)算精度等方面存在嚴(yán)重的缺陷;并且,既有研究均以摩擦系數(shù)表征層間接觸狀態(tài),此方法僅能模擬靜態(tài)的接觸狀態(tài);此外,既有研究中對(duì)于瀝青混合料本構(gòu),大多采用線彈性,少部分采用靜粘彈性,極少部分采用動(dòng)態(tài)模量但沒有同時(shí)考慮加載頻率和溫度的影響。鑒于以上分析,本文著眼于擴(kuò)展有限元法在模擬裂縫擴(kuò)展類問題的優(yōu)勢(shì),利用ABAQUS軟件及其XFEM模塊,瀝青混合料采用考慮受加載頻率和溫度影響的動(dòng)態(tài)模量,并基于漸進(jìn)損傷的脫層失效理論模擬基面層之間動(dòng)態(tài)的層間接觸狀態(tài),分析了瀝青路面半剛性基層反射裂縫的擴(kuò)展,主要內(nèi)容如下:(1)利用ABAQUS軟件及其XFEM模塊,采用瀝青混合料受加載頻率和溫度影響的動(dòng)態(tài)模量本構(gòu),考慮反射裂縫擴(kuò)展至面層和未擴(kuò)展至面層兩種狀態(tài),建立了瀝青路面半剛性基層反射裂縫擴(kuò)展的三維擴(kuò)展有限元模型。(2)分析交通荷載單獨(dú)作用下半剛性基層反射裂縫的擴(kuò)展,研究了動(dòng)載作用下各種影響因素對(duì)基層反射裂縫擴(kuò)展的影響,并基于漸進(jìn)損傷的脫層理論研究了基面層間的結(jié)合狀態(tài)對(duì)反射裂縫擴(kuò)展的影響。(3)分析溫度非周期性變化和周期性變化作用下半剛性基層反射裂縫的擴(kuò)展,研究了溫度作用下各種影響因素對(duì)基層反射裂縫擴(kuò)展的影響,并基于漸進(jìn)損傷的脫層理論研究了基面層間的結(jié)合狀態(tài)對(duì)反射裂縫擴(kuò)展的影響。(4)分析交通荷載和溫度周期變化與非周期性變化共同作用下半剛性基層反射裂縫的擴(kuò)展,在交通荷載單獨(dú)作用、溫度單獨(dú)作用、交通荷載與溫度共同作用下,對(duì)比分析半剛性基層反射裂縫的擴(kuò)展情況以及基于Paris公式的疲勞擴(kuò)展壽命。
[Abstract]:At present, the semi-rigid base material of asphalt pavement in China is mainly treated by hydraulic binder. Due to the influence of external factors and the characteristics of road construction materials, the semi-rigid base is prone to produce initial cracks. Once the base is cracked, under the action of traffic load, temperature and humidity change and other factors, the crack tip produces stress concentration, which leads to the crack spreading to the surface, and then accelerates the damage process of the pavement structure. The long-term service performance and service life of asphalt pavement structure are seriously affected. Therefore, it has important theoretical significance and engineering value to study the propagation of reflection cracks in semi-rigid base. For the problem of reflection crack propagation of semi-rigid base, most of the studies only consider the influence of traffic load, but also a small part of the study of temperature, but the study of traffic load and temperature together is very rare. On the other hand, the traditional finite element numerical simulation method is mostly used in the existing research, which has serious defects in the calculation accuracy and so on. Moreover, the friction coefficient is used to characterize the contact state between the layers, and this method can only simulate the static contact state. In addition, linear elasticity, static viscoelasticity and dynamic modulus are used in most of the existing studies, but the effects of loading frequency and temperature are not considered. In view of the above analysis, this paper focuses on the advantages of the extended finite element method in simulating crack propagation problems. Using ABAQUS software and its XFEM module, the dynamic modulus of asphalt mixture considering the influence of loading frequency and temperature is adopted. Based on the delamination failure theory of progressive damage, the dynamic interlayer contact state between the base layers is simulated, and the propagation of reflection cracks in semi-rigid base course of asphalt pavement is analyzed. The main contents are as follows: (1) using ABAQUS software and its XFEM module, The dynamic modulus constitutive model of asphalt mixture affected by loading frequency and temperature is adopted, and the reflection crack is considered to extend to the surface layer and not to the surface layer. The finite element model for the reflection crack propagation of semi-rigid base course of asphalt pavement is established. (2) the propagation of reflection crack of semi-rigid base course under the action of traffic load alone is analyzed. The influence of various factors on the propagation of reflection crack in the base course under dynamic load is studied. Based on the delamination theory of progressive damage, the influence of the bonding state between the base layers on the propagation of reflective cracks is studied. (3) the propagation of reflection cracks in semi-rigid base is analyzed under the action of non-periodic and periodic temperature variations. The influence of various factors on the propagation of reflection cracks in the base course under the action of temperature is studied. Based on the delamination theory of progressive damage, the influence of the bonding state between the base layers on the propagation of reflective cracks is studied. (4) the propagation of reflective cracks in semi-rigid base is analyzed under the combined action of traffic load and temperature periodic variation and non-periodic variation. Under the combined action of traffic load, temperature, traffic load and temperature, the propagation of reflection crack in semi-rigid base and fatigue life based on Paris formula are compared and analyzed.
【學(xué)位授予單位】：北京交通大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2017
【分類號(hào)】：U416.217

【參考文獻(xiàn)】

相關(guān)期刊論文 前10條

1 樊向陽(yáng);羅蓉;馮光樂;劉涵奇;;瀝青混合料動(dòng)態(tài)模量預(yù)測(cè)模型的驗(yàn)證與分析研究[J];武漢理工大學(xué)學(xué)報(bào)(交通科學(xué)與工程版);2017年02期

2 曹丹丹;趙延慶;付國(guó)志;;層間接觸狀態(tài)對(duì)路表動(dòng)態(tài)黏彈彎沉的影響[J];北京工業(yè)大學(xué)學(xué)報(bào);2017年04期

3 黃志義;陳雅雯;顏可珍;;非均布移動(dòng)荷載作用下黏彈性瀝青路面動(dòng)力響應(yīng)分析[J];重慶交通大學(xué)學(xué)報(bào)(自然科學(xué)版);2017年03期

4 王志臣;郭乃勝;趙穎華;陳忠達(dá);;瀝青混合料黏彈性主曲線模擬及換算[J];工程力學(xué);2017年02期

5 陳輝;羅蓉;劉涵奇;呂慧杰;馮光樂;;基于廣義西格摩德模型研究瀝青混合料動(dòng)態(tài)模量和相位角主曲線[J];武漢理工大學(xué)學(xué)報(bào)(交通科學(xué)與工程版);2017年01期

6 吳磊;彭妙娟;;機(jī)場(chǎng)復(fù)合道面反射裂縫的力學(xué)分析[J];公路;2017年01期

7 葛輝;王宏暢;;動(dòng)荷載作用下瀝青路面基層底裂縫擴(kuò)展研究[J];林業(yè)工程學(xué)報(bào);2016年04期

8 李勝利;孫攀旭;張通;聶丹;王東煒;;基于隱含裂縫三維尺度變化的半剛性基層路面疲勞壽命分析[J];公路;2014年07期

9 黎曉;梁乃興;陳玲;;瀝青混凝土動(dòng)態(tài)模量及時(shí)-溫等效方程[J];長(zhǎng)安大學(xué)學(xué)報(bào)(自然科學(xué)版);2014年03期

10 李彥偉;穆柯;石鑫;王選倉(cāng);;基面層間接觸狀態(tài)對(duì)瀝青路面力學(xué)響應(yīng)影響[J];長(zhǎng)安大學(xué)學(xué)報(bào)(自然科學(xué)版);2014年02期

相關(guān)博士學(xué)位論文 前1條

1 金光來(lái);基于擴(kuò)展有限元的瀝青路面疲勞開裂行為的數(shù)值研究[D];東南大學(xué);2015年

相關(guān)碩士學(xué)位論文 前5條

1 程剛;瀝青混合料斷裂參數(shù)A和n的取值研究[D];武漢工程大學(xué);2015年

2 涂義鵬;考慮溫度場(chǎng)的瀝青路面車轍變化特征分析研究[D];長(zhǎng)沙理工大學(xué);2014年

3 閆正;季凍區(qū)柔性基層瀝青路面Top-Down裂縫開裂機(jī)理及防治措施研究[D];長(zhǎng)安大學(xué);2013年

4 甄西剛;瀝青面層溫度裂縫的擴(kuò)展有限元分析[D];鄭州大學(xué);2012年

5 廖丹;半剛性基層瀝青路面反射裂縫防治技術(shù)研究[D];北京工業(yè)大學(xué);2009年

，

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