机场薄层沥青道面荷载应力和位移分析

采用三维等参有限元法,分析了简易机场薄层沥青道面各层间完全连续接触时土基回弹模量、基层回弹模量和厚度等因素对荷载应力和表面弯沉的影响。分析表明,半刚性基层底面拉应力随土基回弹模量、基层回弹模量和厚度近似呈线性变化;面层底面受压,应力值变化很小,基本不受影响;表面弯沉随基层厚度呈线性变化,随土基回弹模量和基层回弹模量呈曲线变化。

An Analysis of Airfield Thin Layer Asphalt Pavement for Loading Stress and Displacement

This paper calculates the loading stress and surface deflection of flight strip thin layer asphalt pavement with the finite element of three-dimensional isoparametric element,analyzes the effects of the subgrade resilient modulus,the base resilient modulus,and thickness in the completely continuous interface condition.Results indicate that the semi-rigid base underside flexural-tensile stress almost has linear change with the subgrade resilient modulus,the base resilient modulus,and thickness.The surface underside is pressed,and the stress has very small change,which is not effected basically.The surface deflection has linear change with base thickness and curve changes with subgrade resilient modulus and base resilient modulus.