行车荷载作用下路面结构动态响应敏感性分析

摘要

In order to detect the load carrying capacity of pavement structure under road load, the dynamic model of pavement structure is established by ANSYS.The influence of pavement structure parameters on pavement dynamic response is analyzed.The results of finite element analysis show that the influence of the base layer modulus and the sub-base modulus and the soil modulus is relatively small and even negligible for the dynamic strain of the road surface;the effects of the thickness of the surface layer, the thickness of the base layer and the thickness of the subbase are significant , which is the most important factor is the surface layer, when the surface layer modulus increased from 2500MPa to 4500MPa, the test area of the dynamic strain peak from 16.875με reduced to 10.863με, a decline of 35.63%.%为了在行车荷载作用下对路面结构进行承载能力检测,利用ANSYS软件建立了路面结构的三维有限元动态模型,并分析了路面结构层参数变化对路面动态响应的影响.通过大量有限元计算结果表明:对于路表动应变来说,基层模量和底基层模量以及土基模量影响比较小,甚至可以忽略;面层厚度、基层厚度和底基层厚度影响比较显著,其中影响最大的就是面层模量,当面层模量由2500MPa增加到4500MPa时,测试区的动应变峰值由16.875με减小到10.863με,降幅为35.63%.