摘要
根据高速公路路基的实际情况,建立了三维分层地基模型,分别考虑了刚性路面和柔性路面的情况,利用传递矩阵法获得了置于刚性基岩上的层状地基和分层半无限地基的刚度矩阵,将车辆荷载简化为矩形均布移动荷载,利用Fourier变换方法得到了层状地基系统在交通荷载作用下的三维振动解,并用快速傅立叶逆变换方法得到了数值结果,与模型试验结果进行了比较,显示出了较好的一致性,同时分析了荷载大小、土层性状对响应结果的影响,得出了一些有意义的结论。研究结果可为路面施工设计及路基动力响应分析提供参考。
The three-dimensional layered ground model is established based on the construction of expressway. Dynamic responses of rigid pavement and flexible pavement resting on layered ground are studied respectively. By employing transfer matrix method, the integrated rigid matrix of layered ground is obtained. Vehicle loads are considered as rectangular harmonic moving loads; and the analytical solution of the pavement and layered ground interaction is deduced with Fourier transform. Numerical results are derived through the inverse fast Fourier transform method （FFT） and used to analyze the influence of different loads and different ground media properties on dynamic responses. The calculation results are consistent with ones of laboratory model tests. Reference is made to analyze of the pavement design and dynamic response of expressways.
出处
《岩土力学》
EI
CAS
CSCD
北大核心
2009年第10期2965-2970,共6页
Rock and Soil Mechanics
基金
岩土力学与工程国家重点实验室前沿探索性项目(No.SKLQ016)
中科院知识创新工程重要方向项目(No.kzcx2-yw-150)
中科院知识创新工程青年人才领域前沿项目(No.0724041Q01)
