沥青路面结构响应的试验分析

分析落锤式弯沉仪的弯沉数据得到的路面层模量与实测的沥青层芯样劲度模量,然后利用理论的模型计算路面响应,比较测量和理论计算的值。采用多层弹性理论反算模量。正算时采用了三种不同的理论模型,三种模型分别为多层弹性理论;当量厚度的线弹性方法及考虑沥青层粘弹性的有限元方法。结果表明,利用有限元方法计算的结构响应更加接近实际测量结果。

Experimental Analysis on Structural Response of Asphalt Pavement

Analysis of the pavement layer moduli is determined from a back-calculation of falling weight deflectometer(FWD) data and the measured stiffness moduli of asphalt layer cores,then the pavement response is calculated using a theoretical model,measured response compared to theoretical values.Layered elastic theory was used to firstly back-calculate the layer moduli and then three different models were used to forward calculate the strain and deflection.The models were layered elastic theory(LET) ,the method of equivalent thicknesses(MET) with linear elastic and the finite element method(FEM) where asphalt layer may be viscoelastic.The results showed that the calculation structure response from FEM is most consistent with measured results.