【摘要】 通过建立道面结构的有限元模型,仿真模拟土基存在软弱层的各类工况,并得出地震作用下软弱层宽度、厚度、所处深度及弹性模量对刚性道面基频的影响规律,结果表明:基频随软弱层宽度、厚度及所处深度的增大呈减小趋势,随弹性模量的降低逐渐减小,为场道的抗震设计以及土基中软弱层的评价提供了参考依据,具有重要的意义。更多还原

【Abstract】 This paper builds a finite element model of pavement structure and simulates all kinds of working conditions of pavement existing weak layer,and then find the law of fundamental frequency of rigid pavement affecting by weak layer width,thickness,depth and elastic modulus.The results show that: the fundamental frequency decreases with the increases of the weak layer width,thickness and depth and the decreases of elastic modulus. The conclusions provide a reference basis for seismic design of airport pavement and evaluation of weak layer in the subgrade and have important significance.更多还原