基于Interface模型的HMAC路面荷载传递特性研究  

Study on the Load Transfer Characteristics of HMAC Pavement Based on Interface Model

作　　者：徐鹏 孟会林 蒲昌瑜 杨广庆 李婷 XU Peng;MENG Huilin;PU Changyu;YANG Guangqing;LI Ting(State Key Laboratory of Mechanical Behavior and System Safety of Traffic Engineering Structures,Shijiazhuang Tiedao University,Shijiazhuang Hebei 050043,China;Hebei Provincial Communications Planning Design and Research Institute Co.,Ltd.,Shijiazhuang Hebei 050000,China;School of Civil Engineering,Shijiazhuang Tiedao University,Shijiazhuang Hebei 050043,China)

机构地区：[1]石家庄铁道大学省部共建交通工程结构力学行为与系统安全国家重点实验室,河北石家庄050043 [2]河北省交通规划设计研究院有限公司,河北石家庄050000 [3]石家庄铁道大学土木工程学院,河北石家庄050043

出　　处：《铁道建筑技术》2023年第7期1-4,37,共5页Railway Construction Technology

基　　金：国家自然科学基金项目(52108331)。

摘　　要：公路路面是一个多层体系结构,层间的接触状态对路面工作性能影响显著。基于有限差分法,采用Interface模型模拟面层层间的接触状态,分析了下面层为高模量沥青混凝土的路面内部竖向应力与剪应力的传递与扩散特征。研究结果表明:仿真结果与既有数值结果具有较好的一致性;采用HMAC作为下面层可有助于路面结构内部竖向应力的扩散,进而提升路面服役性能;随着面层层间接触状态的增强,剪应力在路面结构内部的分布更均匀,同时采用HMAC作为下面层可有效减小剪应力。Highway pavement is a multi-layer system structure,and the contact state between layers has a significant impact on the pavement performance.Using the finite difference method,the Interface model was used to simulate the contact state between the surface courses,and the characteristics of vertical and shear stresses of transfer and diffusion in the pavement with high modulus asphalt concrete as lower layer were analyzed.The results show that the simulation results are in good agreement with the previous numerical results;using HMAC as the lower layer can help the diffusion of the vertical stress in the pavement structure,thereby improving the performance of the pavement.With the enhancement of the contact state between the surface courses,the shear stress is more evenly distributed in the pavement structure.At the same time,the HMAC as lower layer can effectively reduce the shear stress.

关 键 词：路面 高模量 有限差分 层间接触状态 

分 类 号：U416.2[交通运输工程—道路与铁道工程]