移动荷载作用下柔性路面的动力响应  

Dynamic response of flexible pavement under moving load

作　　者：张洪亮[1] 胡长顺[1] 许伟清 

机构地区：[1]长安大学特殊地区公路工程教育部重点实验室,陕西西安710064 [2]无锡市安阳市政建设工程有限公司,江苏无锡214183

出　　处：《长安大学学报（自然科学版）》2005年第5期6-10,共5页Journal of Chang’an University(Natural Science Edition)

基　　金：国家西部交通建设科技项目(200131800018)

摘　　要：将车辆荷载的接地形状简化为矩形,将柔性路面视作多层粘弹性半空间体,并考虑路基材料对应变幅的依赖性,采用修正的平面应变模型,用传递矩阵配拉氏变换和傅立叶变换法,对移动的平稳荷载作用下柔性路面的动力响应进行了分析,得到了柔性路面任意深度处的应力和位移,并将理论计算结果用模型试验进行了验证。结果表明,移动荷载作用下柔性路面的动力响应分析方法结果正确,计算简单,便于应用。Simplifying the contract shape between tire and pavement as a rectangle, considering the flexible pavement as multilayered viscoelastic half space, taking into account the strong dependency on strain of the properties of soil, based on a modified plane strain model, this paper derived the explicit solution for the dynamic response in the flexible pavement under moving load. The combination of transfer matrix, Laplace transform and Fourier transform approach were used in the dynamic response analysis. The predictive capability of the model are verified by the laboratory model. The results show that the method to analyze the dynamic response in the flexible pavement under moving load presented in this paper is correct, simple and convenient for application. 1 tab, 5 figs, 6 refs.

关 键 词：道路工程 柔性路面 动力响应 移动荷载 多层粘弹体系 传递矩阵 拉氏变换 傅立叶变换 

分 类 号：U416.221[交通运输工程—道路与铁道工程]