水和温度作用下城市沥青路面损害机理研究
发布时间:2018-05-22 07:53
本文选题:沥青路面 + 高温多雨 ; 参考:《湖南科技大学》2014年硕士论文
【摘要】:夏季高温多雨是我国东南湿热地区典型的气候特征,也是路面病害形成的环境,其中高温和行车荷载是导致路面车辙的重要因素,路表水渗入到沥青路面结构层内,会降低沥青膜对集料的粘附性,造成沥青膜从集料表面剥落,导致路面水损害。因此沥青路面在高温多雨条件下损害成为各国沥青路面设计和养护中急需解决的问题。 本文主要以东南湿热地区城市道路水损害及防控技术研究为依托,结合国内外已有文献对于湿热地区沥青路面损害情况的研究,对泉州市地区沥青路面结构高温多雨条件下沥青路面损害机理进行分析。首先,总结归纳了泉州市自然环境、降水量、以及气候特点,调查了泉州市区1981~2011近30年降雨量、平均气温和高温极大值、极小值。调查研究了泉州市城市道路路面损害状况,总结了泉州市沥青路面损害特征及产生机理。然后,通过试验研究在水和温度的影响下沥青混合料的材料性能改变,给出沥青混合料弹性模量随温度和水环境的变化关系。然后采用试验数据关系,基于弹性层状理论建立有限元模型,分析在静水作用机理下,沥青路面结构行车荷载作用下的力学响应规律。然后采用泉州市夏季最高气温时的天气情况,,利用公式计算了沥青路表的近地空气温度变化情况;采用有限元数值模拟,计算了沥青路面结构的温度场,分析沥青路面温度沿深度以及随时间变化情况。然后在沥青路面结构温度场分析的基础上,基于热弹性层状理论体系,采用ANSYS有限元顺序耦合的方法分析了沥青路面结构在温度和荷载耦合作用下的力学响应规律。最后分析在夏季高温暴雨温度骤降时,水和温度共同作用下沥青路面结构力学响应规律的变化。
[Abstract]:High temperature and heavy rain in summer is a typical climate feature of wet and hot areas in southeast China, and it is also the environment where pavement diseases are formed. Among them, high temperature and driving load are important factors leading to rutting of pavement, and surface water seeps into asphalt pavement structure layer. The adhesion of asphalt film to aggregate will be reduced, which will result in the spalling of asphalt film from aggregate surface and water damage of road surface. Therefore, the damage of asphalt pavement under the condition of high temperature and heavy rain has become an urgent problem in the design and maintenance of asphalt pavement in various countries. This paper is mainly based on the study of water damage and prevention and control technology of urban roads in southeastern humid and hot areas, combined with the research on asphalt pavement damage in humid and hot areas in domestic and foreign literature. The damage mechanism of asphalt pavement in Quanzhou area is analyzed under the condition of high temperature and much rain. Firstly, the natural environment, precipitation and climatic characteristics of Quanzhou are summarized, and the rainfall, mean temperature and high temperature maximum, minimum value of nearly 30 years rainfall, mean temperature and high temperature in Quanzhou urban area are investigated in 1981 and 2011. This paper investigates and studies the damage of urban road surface in Quanzhou city and summarizes the damage characteristics and producing mechanism of asphalt pavement in Quanzhou city. Then, the change of material performance of asphalt mixture under the influence of water and temperature is studied, and the relationship between elastic modulus of asphalt mixture and temperature and water environment is given. Then the finite element model based on elastic layer theory is established by using the experimental data relationship and the mechanical response of asphalt pavement structure under driving load is analyzed under the mechanism of hydrostatic action. Then, using the weather condition of the highest temperature in summer in Quanzhou City, using the formula to calculate the change of the near earth air temperature of asphalt pavement table, the temperature field of asphalt pavement structure is calculated by using finite element numerical simulation. The variation of asphalt pavement temperature along depth and with time is analyzed. Then, based on the analysis of temperature field of asphalt pavement structure and the thermoelastic layered theory system, the mechanical response of asphalt pavement structure under the coupling of temperature and load is analyzed by ANSYS finite element sequential coupling method. Finally, the change of mechanical response law of asphalt pavement structure under the action of water and temperature is analyzed when the temperature of high temperature rainstorm drops sharply in summer.
【学位授予单位】:湖南科技大学
【学位级别】:硕士
【学位授予年份】:2014
【分类号】:U416.217;U418.6
【参考文献】
相关期刊论文 前6条
1 郑健龙,周志刚,应荣华;沥青路面温度应力数值分析[J];长沙交通学院学报;2001年01期
2 罗志刚,周志刚,郑健龙;沥青路面水损害问题研究现状[J];长沙交通学院学报;2003年03期
3 李志刚;邓小勇;;动载作用下沥青路面内部孔隙水压力的轴对称弹性解[J];东南大学学报(自然科学版);2008年05期
4 许涛,黄晓明;沥青混合料水损害性评价方法研究[J];公路;2003年S1期
5 李剑,郝培文;消石灰改善沥青混合料抗剥离性能研究[J];公路;2004年05期
6 冯俊领;郭忠印;陈崇驹;李德章;;高温多雨条件下沥青混合料水损害模拟研究[J];建筑材料学报;2007年05期
相关博士学位论文 前1条
1 耿立涛;沥青路面温度应力及超孔隙水压力计算[D];大连理工大学;2009年
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