车辆动载实测及动载对路面响应影响的研究
发布时间：2019-07-10 11:50
【摘要】：随着我国经济建设的蓬勃兴起,公路建设得到迅猛发展。然而,由于交通量的不断增加,现有沥青路面却无法达到本来的设计使用年限,致使路面的实际使用寿命低于设计使用寿命,许多地区的道路在投入使用不久就发生了早期损坏,需要小修甚至大修,一方面严重影响了交通的正常运行,另一方面也在经济上造成极大的损失。 为探究这一现象的成因,研究人员利用AASHTO2002中轴载谱的方法对辽宁省部分地区的交通荷载数据进行调查,调查结果显示各处计重站点均存在严重的超重现象,绝大部分类型的载重货车其超载比例超过50%。除此之外,有一定比例的车辆总重并没有超载,然而其承重轴却超出了标准轴重。 严重的超载造成沥青路面使用寿命的减少,这对于沥青路面设计方法的改进提出了新的要求。传统的路面结构设计以静荷载为基础,难以描述路面在车辆行驶过程中车辆动荷载对路面的实际力学响应。 在我国,车辆对路面动荷载的研究有着一定的发展,然而这一方面的研究多通过数值计算或有限元模拟,缺乏动载试验的实测数据支持。本文设计出一种新的动载试验,通过试验结果可以分析出道路状况、车速以及载重对车辆实际动载的影响,并为进一步的研究提供数据支持。 在车辆动载试验的基础上,研究人员利用3D-Move Analysis软件建立三维路面模型,在模拟出来的路面结构上施加动态荷载,以此分析车辆在不同道路状况、不同行驶速度下对路面结构的力学响应,探究动荷载条件下沥青路面结构的实际行为特性。
文内图片：
图片说明：各类车典型车型示例
[Abstract]:With the vigorous rise of economic construction in our country, highway construction has been developed rapidly. However, due to the continuous increase of traffic volume, the existing asphalt pavement can not reach the original design service life, resulting in the actual service life of the pavement is lower than the designed service life. The roads in many areas have been damaged in the early stage and need minor repair or even overhaul. On the one hand, it has seriously affected the normal operation of traffic, on the other hand, it has also caused great losses in the economy. In order to explore the cause of this phenomenon, the researchers investigated the traffic load data in some areas of Liaoning Province by using the method of AASHTO2002 axle load spectrum. The results show that there is a serious overweight phenomenon in various weighing stations, and the overload proportion of most types of load trucks is more than 50%. In addition, a certain proportion of the total vehicle weight is not overloaded, but its load-bearing shaft exceeds the standard axle load. Serious overload results in the reduction of service life of asphalt pavement, which puts forward new requirements for the improvement of asphalt pavement design method. The traditional pavement structure design is based on static load, so it is difficult to describe the actual mechanical response of vehicle dynamic load to pavement during vehicle driving. In our country, the research on dynamic load of pavement has been developed to a certain extent. However, most of the research in this field is supported by numerical calculation or finite element simulation, which is lack of measured data of dynamic load test. In this paper, a new dynamic load test is designed, through which the effects of road condition, speed and load on the actual dynamic load of the vehicle can be analyzed, and the data support can be provided for further research. On the basis of vehicle dynamic load test, the researchers use 3D-Move Analysis software to establish a three-dimensional pavement model and apply dynamic load to the simulated pavement structure, so as to analyze the mechanical response of vehicles to pavement structure under different road conditions and different driving speeds, and to explore the actual behavior characteristics of asphalt pavement structure under dynamic load.
【学位授予单位】：大连理工大学
【学位级别】：硕士
【学位授予年份】：2014
【分类号】：U416.217;U461.5
本文编号：2512583
文内图片：
图片说明：各类车典型车型示例
[Abstract]:With the vigorous rise of economic construction in our country, highway construction has been developed rapidly. However, due to the continuous increase of traffic volume, the existing asphalt pavement can not reach the original design service life, resulting in the actual service life of the pavement is lower than the designed service life. The roads in many areas have been damaged in the early stage and need minor repair or even overhaul. On the one hand, it has seriously affected the normal operation of traffic, on the other hand, it has also caused great losses in the economy. In order to explore the cause of this phenomenon, the researchers investigated the traffic load data in some areas of Liaoning Province by using the method of AASHTO2002 axle load spectrum. The results show that there is a serious overweight phenomenon in various weighing stations, and the overload proportion of most types of load trucks is more than 50%. In addition, a certain proportion of the total vehicle weight is not overloaded, but its load-bearing shaft exceeds the standard axle load. Serious overload results in the reduction of service life of asphalt pavement, which puts forward new requirements for the improvement of asphalt pavement design method. The traditional pavement structure design is based on static load, so it is difficult to describe the actual mechanical response of vehicle dynamic load to pavement during vehicle driving. In our country, the research on dynamic load of pavement has been developed to a certain extent. However, most of the research in this field is supported by numerical calculation or finite element simulation, which is lack of measured data of dynamic load test. In this paper, a new dynamic load test is designed, through which the effects of road condition, speed and load on the actual dynamic load of the vehicle can be analyzed, and the data support can be provided for further research. On the basis of vehicle dynamic load test, the researchers use 3D-Move Analysis software to establish a three-dimensional pavement model and apply dynamic load to the simulated pavement structure, so as to analyze the mechanical response of vehicles to pavement structure under different road conditions and different driving speeds, and to explore the actual behavior characteristics of asphalt pavement structure under dynamic load.
【学位授予单位】：大连理工大学
【学位级别】：硕士
【学位授予年份】：2014
【分类号】：U416.217;U461.5
【参考文献】
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