本文在建立车辆-道路耦合系统分析模型的基础之上,编制了车路耦合系统的动力仿真程序,研究了不同路面不平顺幅值,不同车辆行驶速度,不同车辆载重以及轴数的变化等参数情况下路面结构不同节点的位移及加速度随参数的变化情况;并探讨了不同路面结构层厚度组合情况下对路面结构的动力响应的影响,研究结果表明路面不平顺幅值对于路面结构的位移与加速度响应影响巨大;车速增加虽不影响路面结构的位移响应,但是增大了路面结构的加速度响应从而增大了对于路面结构的冲击作用;载重的增大会显著增大路面结构的位移与加速度响应;不同路面结构层厚度的组合会显著影响路面结构系统的动力响应,相关的研究还有待于进一步的理论与试验验证.

Being of the simple constructing procedure and low cost,dynamic compaction method was widely used in the foundation consolidation around the world.Recently,the vibration effect due to the dynamic compaction on the adjacent structures was highlighted in the construction field.Based on 207 vibration records recorded in-situ during the construction of foundation consolidation by the way of dynamic compaction,the statistical analysis respecting to the peak ground acceleration(PGA) and peak ground velocity(PGV) was performed.Referring to the earthquake intensity classification of the China Earthquake Intensity Table(GB/T 17742-1999) and the allowable vibration velcity of the Safe Blasting Regulation(GB6722-2003),the vibration assessment for the dynamic compaction was carried out.The allowable safety distance for the different structures with the dynamic compaction under the specified energy grade was proposed as well.