沥青路面模量反演方法研究

Study on the back-calculation method of asphalt pavement layer moduli

在路面管理系统中,对路面的强度评价是一个非常重要的组成部分,路面结构模量作为一个重要的设计参数,在路面管理,养护,维修,改建等决策中发挥重要的作用。本文通过对现有路面模量反演方法进行分析,将比例边界有限元方法引入路面弯沉的求解中来,与传统有限元法相结合,解决了传统有限元方法由于人工边界的引入而存在的问题。并结合系统识别方法,实现路面模量的反演。计算结果表明,该方法对实际工程问题适用、有效。

In the management system of road surface, it is a very important ingredient of intensity appraising, as a important design parameter, the modulus act as important effect. The scaled boundary finite element （SBFE） method is introduced to solve the surface deflection of the road. The deficiencis of the methods that used to backcalculate the pavement layer＇s modulus are analyzed. By combining with the traditional finite element method, the error problems brought of manual-boundary in the finite element method were well solved. And the modului are back calculated by using the system identification method.