中外公路2025，Vol.45Issue(3)：74-82,9.DOI:10.14048/j.issn.1671-2579.2025.03.009
基于双模量理论的半柔性路面结构分析
Semi-Flexible Pavement Structure Analysis Based on Double Modulus Theory
摘要
Abstract
Semi-flexible pavement materials have significant differences in tension and compression.If the mechanical response analysis of pavement structures is conducted by using the traditional linear elastic theory with a single modulus,there will be a considerable deviation from actual situations.To analyze and optimize semi-flexible pavement structures,this paper compared the changes in key mechanical responses of pavement structures under six different semi-flexible layer positions and thickness combinations based on the double modulus theory.The results show that there is a significant difference in the calculation results of key mechanical responses of the pavement based on the double modulus theory and the single modulus theory,with the difference in the maximum longitudinal tensile strain of the pavement being the most significant(over 60%).Compared to other layer combinations,when the upper or middle layer is composed of a semi-flexible pavement material,the surface deflection is larger,and the overall stiffness of the pavement structure is smaller.When the middle-lower,lower,or upper-middle-lower layers contain semi-flexible pavement materials,the tensile stress at the bottom of the lower layer is high,which makes it prone to cracking.When the middle-upper layers contain semi-flexible pavement materials,the critical mechanical response is relatively small,and it is recommended that the upper-middle layer be the optimal application layer.A model for the relationship between the key mechanical responses and the thickness of the semi-flexible layer was established.The maximum tensile stress on the road surface is most significantly affected by the thickness of the semi-flexible layer(up to 64%).When the semi-flexible material is applied to the upper-middle layers,the optimal thickness range is 10-12 cm.The research results can provide reference for the design of semi-flexible pavement structures considering the differences in tension and compression.关键词
半柔性路面/双模量/力学分析/层位优化/厚度控制/数值计算Key words
semi-flexible pavement/double modulus/mechanical analysis/layer optimization/thickness control/numerical calculation分类
交通工程引用本文复制引用
潘勤学,周殊睿,胡嘉,张龙,宋小金,刘宏富..基于双模量理论的半柔性路面结构分析[J].中外公路,2025,45(3):74-82,9.基金项目
国家自然科学基金资助项目(编号:52378441,51908071,52078064) （编号:52378441,51908071,52078064）
湖南省自然科学基金资助项目(编号:2024JJ5037) （编号:2024JJ5037）
湖南省交通运输厅科技进步与创新计划项目(编号:202107) （编号:202107）
湖南省教育厅科学研究项目(编号:24B0322) （编号:24B0322）
