共振碎石化路面弯沉响应特征及模量敏感性分析  

Analysis of Deflection Response Characteristics and ModulusSensitivity of Resonant Crushed Stone Pavement

作　　者：袁文治 杨群[1] YUAN Wenzhi;YANG Qun(The Key Laboratory of Road and Traffic Engineering,Ministry of Education,Tongji University,Shanghai 201804,China)

机构地区：[1]同济大学道路与交通工程教育部重点实验室,上海201804

出　　处：《交通科技》2024年第4期1-5,共5页Transportation Science & Technology

基　　金：国家自然科学基金面上项目(51778482)资助。

摘　　要：共振碎石化路面的结构强度评估工作对于掌握其承载能力至关重要。为探究路面结构弯沉的变化特点,基于ABAQUS建立共振碎石化路面有限元模型,分析弯沉空间分布规律,进一步将碎石化层分为三层、变换其模量,分析弯沉对其敏感性变化。研究发现弯沉沿横断面呈现“M”形分布,纵断面呈现“山”形分布。随着各层模量的增加,弯沉出现不同程度的降低,在低模量区间结构层弯沉变化较快;在中高模量区间,弯沉随着碎石化上层和中层模量增大仍保持较高水平的降低速率,但弯沉对碎石化下层模量变化的敏感性逐渐降低。The evaluation of structural strength of resonant crushed stone pavement is essential to master its carrying capacity.In order to explore in depth the characteristics of structural deflection,the finite element model of resonant crushed stone pavement based on ABAQUS was studied,and the law of deflection space distribution is analyzed.Furthermore,the crushed stone layer was divided into three layers to transform its modulus and analyze the sensitivity of deflection.It was found that the deflection presents“M”type distribution along the transverse section and the“mountain”type distribution along the longitudinal section.With the increase of each layer modulus,there are different degrees of reduction,and the structure layer deflection change in the low modulus interval is faster.In the medium and high modulus interval,the deflection decreasing rate remains high with the increase of the upper and middle layers of the crushed stone modulus,but the deflection sensitivity to the change of the lower layers of the crushed stone modulus gradually decreases.The research can provide some theoretical basis for the structural strength evaluation of resonant crushed stone pavement.

关 键 词：道路工程 共振碎石化路面 三维有限元模拟 力学响应 弯沉分析 

分 类 号：U416.2[交通运输工程—道路与铁道工程]