【摘要】：隨著我國(guó)科學(xué)技術(shù)和經(jīng)濟(jì)的快速發(fā)展,高速公路的發(fā)展已經(jīng)進(jìn)入了一個(gè)新的時(shí)代,瀝青路面的使用越來(lái)越廣泛,瀝青路面已成為中國(guó)公路路面結(jié)構(gòu)的主要形式。但交通量的增加,車輛在行駛中由于路面不平度對(duì)路面產(chǎn)生的振動(dòng)等對(duì)瀝青路面的損害和路面質(zhì)量及壽命的影響也越來(lái)越嚴(yán)重,因此有必要研究交通荷載作用下瀝青路面的力學(xué)性能。針對(duì)以上的問(wèn)題,本文首先對(duì)交通荷載進(jìn)行數(shù)據(jù)處理然后建立瀝青路面三維模型,應(yīng)用三維動(dòng)力有限元方法,采用ANSYS有限元軟件分析了瀝青路面在交通荷載作用下的動(dòng)力響應(yīng),并對(duì)數(shù)據(jù)進(jìn)行了分析。本文所做的主要工作如下:1)車輛動(dòng)荷載理論計(jì)算。基于路面不平整條件下車路相互作用動(dòng)力分析,建立車輛路面系統(tǒng)動(dòng)力平衡方程,利用數(shù)學(xué)軟件Matlab編程模擬不同等級(jí)路面不平整度值,編寫中心差分法程序?qū)ζ胶夥匠踢M(jìn)行計(jì)算,得到不同路面等級(jí)下隨機(jī)行車動(dòng)荷載;2)將所研究的瀝青路面結(jié)構(gòu)使用路面路基三維模型進(jìn)行建模,交通荷載簡(jiǎn)化為由計(jì)算得到的移動(dòng)荷載的最大動(dòng)荷載作用在不平整路面上,利用ANSYS軟件對(duì)路面和道路基層的動(dòng)力響應(yīng)進(jìn)行分析;3)考慮半剛性路基材料(水泥穩(wěn)定砂)性能劣化瀝青路面力學(xué)性能研究,水泥穩(wěn)定砂在疲勞損傷后的力學(xué)性能變化。由于水泥穩(wěn)定砂礫基層的力學(xué)性能劣化,瀝青路面的應(yīng)力應(yīng)變會(huì)受到很大的影響。針對(duì)這種情況,采用ANSYS有限元分析軟件,分析了在水泥穩(wěn)定砂基層力學(xué)性能劣化的影響下,荷載對(duì)層狀瀝青路面應(yīng)力和變形的影響,并對(duì)行車荷載對(duì)瀝青路面的影響作了深入分析。
[Abstract]:With the rapid development of science and technology and economy of our country, the development of expressway has entered a new era, the use of asphalt pavement is more and more extensive, asphalt pavement has become the main form of highway pavement structure in China. However, with the increase of traffic volume, the damage to asphalt pavement and the influence of pavement quality and service life due to the vibration caused by the road surface unevenness are becoming more and more serious. Therefore, it is necessary to study the mechanical properties of asphalt pavement under traffic load. In order to solve the above problems, this paper firstly processes the traffic load and then establishes the three-dimensional model of asphalt pavement. The dynamic response of asphalt pavement under traffic load is analyzed by using three-dimensional dynamic finite element method and ANSYS finite element software. The data are analyzed. The main work of this paper is as follows: 1) theoretical calculation of vehicle dynamic load. Based on the dynamic analysis of the road interaction on the condition of road roughness, the dynamic equilibrium equation of vehicle pavement system is established, and the values of road roughness of different grades are simulated by using the mathematical software Matlab. The central difference method program is compiled to calculate the equilibrium equation, and the random driving dynamic loads under different pavement grades are obtained. 2) the study of asphalt pavement structure is modeled with the three-dimensional model of pavement subgrade. The traffic load is simplified as the maximum dynamic load of the calculated moving load acting on an uneven road surface. The dynamic response of pavement and road base is analyzed by ANSYS software. 3) considering the degradation of semi-rigid subgrade material (cement stabilized sand), the mechanical properties of cement stabilized sand after fatigue damage are studied. Due to the deterioration of mechanical properties of cement stabilized gravel base, the stress and strain of asphalt pavement will be greatly affected. In view of this situation, the influence of load on the stress and deformation of layered asphalt pavement under the influence of deterioration of mechanical properties of cement stabilized sand base is analyzed by using ANSYS finite element analysis software. The influence of driving load on asphalt pavement is analyzed.
【學(xué)位授予單位】：西安建筑科技大學(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 王強(qiáng);趙又群;付宏勛;張彬彬;;載荷與徑向剛度對(duì)機(jī)械彈性車輪包容特性的影響[J];農(nóng)業(yè)工程學(xué)報(bào);2016年13期

2 俞仁怡;楊s，

本文編號(hào)：2269778