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考虑路面板和地基的相互作用,将路面板作为三维弹性体,建立路面板-层状多相弹性地基动力响应的三维多相层状弹性半空间体模型,分析了移动荷载作用下路面板-多相弹性地基系统的动力响应.将移动单元法引入到两相饱和弹性介质的半解析方法中,构造了随荷载按照相同速度运动的移动层单元,基于移动坐标下两相饱和弹性介质的动力控制方程和边界条件,应用加权残数法建立了两相弹性介质移动层单元动力方程,该方程可退化为单相弹性介质移动层单元动力方程,基于此,建立了移动荷载下多相弹性地基与路面板系统的三维动态响应的统一的半解析方程.并以两相饱和弹性半空间地基-单相弹性地基-路面板所形成的路面结构为例,数值分析了荷载速度、饱和层渗透系数、弹性层厚度等参数对路面板位移和土体孔压响应的影响.研究结果表明移动单元法是研究移动荷载下路面结构动态响应的一种有效的方法.
Considering the interaction between pavement slab and ground, the three-dimensional multiphase layered elastic half-space body model of pavement-layered multi-phase elastic foundation dynamic response is established by using pavement slab as 3D elastic body. The influence of moving load on pavement- Dynamic response of multi-phase elastic foundation system The moving element method is introduced into the semi-analytical method of two-phase saturated elastic media. The moving layer elements moving at the same speed with load are constructed. Based on the dynamic of the two-phase saturated elastic medium Control equations and boundary conditions, the dynamic equation of moving layer in two-phase elastic medium is established by using the weighted residual method. This equation can be degenerated into the dynamic equation of single-layer elastic medium moving layer. Based on this, the multi-phase elastic foundation under moving load And the three-dimensional dynamic response of the pavement slab system, and the pavement structure formed by the two-phase saturated elastic half-space foundation-single-phase elastic foundation-pavement slab is taken as an example to analyze the relationship between the load velocity, , Elastic layer thickness and other parameters on the displacement of pavement slab and soil pore pressure response.The results show that the mobile unit method is to study An effective method of dynamic loads under dynamic response of the pavement structure.