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高等级公路路面结构体系的动力特性研究一直倍受工程界关注,由于动测试验实施数量有限且数据样本庞大,因此研究人员更多是采取数值仿真技术来对公路设计进行指导。采用刚性路面板与具有横观各向同性体性质的路基体构建高精度数值仿真模型,使用有限元—无限元耦合算法,编制相应的Matlab程序对实际工程中的水泥混凝土路面——层状路基结构体系进行静动力仿真计算。研究表明:通过模拟该体系在均布静载下的地基沉降数值计算,指出在利用有限元—无限元耦合方法解决板与地基构建的路面结构体系的基础上,对板与地基引入横观各向同性理论是满足计算精度要求的,并且使计算模型更接近实际情况,计算结果更具有实际指导意义;同时通过模拟车辆移动荷载对路面结构体系进行动力响应分析,对比考虑横观各向同性与否两种理论模型的计算结果,揭示了此结构体系位移、加速度最值的变化规律,为工程设计路面体系动力特性提供了一种高精度数值仿真方法。
The research on the dynamic characteristics of high-grade highway pavement structure system has been paid close attention to by engineering researchers. Because of the limited number of dynamic testing and the large data samples, researchers mostly use numerical simulation technology to guide highway design. The rigid pavement plate and the roadbed with transverse isotropy are used to construct the high-precision numerical simulation model. The finite element method (FEM) -finite element coupled algorithm is used to compile the corresponding Matlab program to simulate the concrete pavement-layered subgrade Structural system of static and dynamic simulation. The results show that: by simulating the numerical calculation of the settlement of the foundation under uniform static loading, the paper points out that on the basis of solving the pavement structure system of slab and foundation by using the finite element-finite element method, The theory of homosexuality is to meet the requirements of computational accuracy, and make the calculation model closer to the actual situation, the calculation results are more practical guidance. At the same time, by analyzing the dynamic response of pavement structure system by simulating vehicle moving loads, No The calculation results of the two theoretical models reveal the variation law of displacement and acceleration of the structural system and provide a high-precision numerical simulation method for the dynamic characteristics of the pavement system.