柔性基层模量及厚度对倒装式路面结构受力影响分析  

Mechanical Analysis on Influence of Flexible Base Modulus and Thickness on Inverted Pavement Structure

作　　者：王为义[1] 陈景雅[1] 吴菲[1] 王健[1] 

机构地区：[1]河海大学土木与交通学院,江苏南京210098

出　　处：《华东交通大学学报》2016年第3期23-28,共6页Journal of East China Jiaotong University

摘　　要：为研究柔性基层参数对倒装式路面结构的受力影响,利用ABAQUS有限元软件建立倒装式路面结构模型,分析在不同柔性基层模量及厚度下倒装式沥青路面结构的各项力学性质。计算结果表明：增加柔性基层厚度可以降低路表弯沉值,改善半刚性基层底部拉应力,但是对面层底部拉应力以及沥青面层疲劳寿命不利,对面层中剪应力值影响较小;提高柔性基层模量对各项力学指标均有利。综合考虑各项指标,建议柔性基层模量取450～500 MPa,柔性基层厚度取10～15 cm。In order to research the influence of flexible base parameters on inverted structure pavement, the study used ABAQUS software to establish a three-dimensional pavement structure model and analyzed mechanical properties of asphalt pavement structure with different flexible base modulus and thickness. Calculation results showed that increasing thickness of flexible base could reduce road surface deflection and decrease stress of semi-rigid base layer tensile at the bottom, but had adverse effects on tensile stress of asphalt layer at the bottom and the fatigue life of the pavement; thickness of flexible base had less effects on shear stress in surface layer;increasing modulus of flexible base was beneficial to the mechanical indexes of pavement. Through comprehensive analysis of various indicators, the study concluded that a reasonable modulus of flexible base was from 450 to 500MPa and a reasonable thickness of the flexible base was from 10 to 15 cm.

关 键 词：倒装式 有限元 模量 厚度 力学分析 

分 类 号：U411[交通运输工程—道路与铁道工程]