【作者】 董忠红；

【导师】 吕彭民；

【作者基本信息】 长安大学 ， 机械设计及理论， 2008， 博士

【摘要】 重型车辆对路面作用的振动冲击荷载以及沥青路面结构在该荷载下的动力响应是目前研究的热点,是进行车-路友好设计和路面结构动态设计的基础,是解释和解决现有多种沥青路面破坏问题的必要手段。采用理论研究与试验研究相结合的技术路线,对重型车辆和沥青路面动力响应进行系统研究。主要研究内容如下：1、重型车辆对路面作用的振动冲击荷载研究：采用多刚体系统动力学方法,建立二分之一车辆动力学模型,研究了路面不平度、轴重、速度和胎压对车辆动荷载的影响。2、移动荷载下粘弹性层状体系动力学模型：采用三维粘弹性微分型本构关系,结合小变形连续体的平衡方程和几何方程,建立移动荷载下粘弹性层状体系动力响应模型,通过野外现场试验的试验结果验证了模型的可靠性。3、半刚性基层沥青路面动力响应理论研究：建立移动荷载下半刚性基层沥青路面的动力学模型,分析路面结构动力响应的特点,结合野外现场试验结果,提出半刚性基层沥青路面动态设计的关键控制指标,研究了轴重、车辆速度、胎压和面层厚度对路面结构动力响应的影响。4、典型沥青路面结构动力响应理论研究：建立5种典型路面结构在移动车辆荷载作用下的动力学模型,对比分析不同路面结构的动力响应特点,提出各种路面结构动态设计时的关键控制指标。倒装结构动力性能较好,结构组成与半刚性基层结构相近,是一种比较适合于我国交通现状的路面结构。深入研究了轴重、速度、胎压和面层厚度对倒装结构动力响应的影响。5、沥青路面动力响应试验研究：综合分析路面结构施工环境和动力响应特点,研制开发动应变传感器。进行多层柔性体系动力响应室内试验研究和半刚性基层沥青路面动力响应野外现场试验研究。研究轴重和车辆速度对路面结构动力响应的影响,以及不同结构层的动力响应特点。更多还原

【Abstract】 The dynamic load exerting on the pavement coming from the moving heavy vehicle and the dynamic response of the asphalt pavement under the moving vehicle load are thermal topics, which are the bases of the vehicle-road friendly design and pavement dynamic design. Especially, they are the necessary means to explain and to deal with multiple destructions of the asphalt pavement. The technical route integrating experiment and theory means was carried to study the dynamic response of the heavy vehicle and the multiple typical asphalt pavements.The main researches are listed as follows:1. Study on the dynamic wheel load:Using multiple rigid system dynamics, a half vehicle model was established. The influences of the road roughness, axle load, vehicle speed and tire pressure on the wheel load were studied.2. Dynamic response model of visco-elastic multilayer under moving load:Using the differential shape theological equation of the three dimensional and the balance equation and the geometric equation of minute deformation continuum structure, a dynamic model of the visco-elastic finite-layer system under moving load is proposed. The reliability of the model was proved with the test results in field.3. Theory study on the dynamic response of the semi-rigid base asphalt pavement: Exerting moving vibration load studied above, a visco-elastic multi-layer dynamic model of the semi-rigid base asphalt pavement was proposed, and the dynamic characteristic of the pavement was studied. With the results of the theoretical analysis and the experimental results, the key parameters of the semi-rigid base asphalt pavement ware proposed for dynamic design. And the influences of axle load and vehicle speed and tire pressure and the thickness of the surface layer on the dynamic response of the asphalt pavement were studied.4. Theory study on the dynamic response of typical asphalt pavements:Investigating asphalt pavements in common use internal and external,5 typical pavements were selected to study the dynamic performances of different pavement based on several evaluation parameters. It is concluded that the key parameters are different for different pavement. The inverse structure asphalt pavement has good dynamic performance and it’s structure is similar with the structure of the semi-rigid base asphalt pavement, so it is suited to the heavy transportation in China. And the influences of axle load and vehicle speed and tire pressure and the thickness of the surface layer on the dynamic response of the inverse structure asphalt pavement were studied. 5. Experiment study on the dynamic response of the asphalt pavement:In view of the complication of road construction and the characteristic of dynamic response of pavement, a sensor was built up which could be used to examine the dynamic response of asphalt pavement under real traffic load. And the experiment to study the dynamic response of mutilayer flexible system was done in laboratory. The experiment to study the dynamic response of the semi-rigid base asphalt pavement under typical moving vehicle load was done in field. And the influences of axle load and vehicle speed on the dynamic response of the asphalt pavement were studied, and the dynamic performance of different layer was studied also.更多还原