水泥混凝土路面板角脱空受力特性分析  

Analysis of Mechanical Characteristics of Corner Void in Cement Concrete Pavement

作　　者：刘海川 曾晓辉[1] 朱华胜 凌晨博 潘璋 陈鲤波 康俊 陈洪章 彭崇斌 王俊 LIU Hai-chuan;ZENG Xiao-hui;ZHU Hua-sheng;LING Chen-bo;PAN Zhang;CHEN Li-bo;KANG Jun;CHEN Hong-zhang;PENG Chong-bin;WANG Jun(School of Civil Engineering,Southwest Jiaotong University,Chengdu 610031,China;Yibin Lingang Construction Co.Ltd.,Yibin 644002,China)

机构地区：[1]西南交通大学土木工程学院,成都市610031 [2]宜宾临港建设有限公司,宜宾市644002

出　　处：《公路》2018年第12期1-5,共5页Highway

基　　金：国家“十三五”重点研发计划,项目编号2016YFB0303603

摘　　要：为研究水泥混凝土路面板角脱空区受力特性,应用ANSYS-CFX建立流固耦合模型,对水泥混凝土路面在车辆荷载一动水压力耦合作用下板角脱空区所受应力进行了分析。研究结果表明:在相同行车荷载作用下,相比于无水状态的脱空区,有动水压力作用下的板角脱空区裂纹尖端等效应力和最大主应力提高了约30%,而脱空区路面板板顶和板底的应力有着不同程度的减小,且板顶的主拉应力大于尖端的主压应力。考虑有水状态下材料的刚度折减时,脱空区裂纹尖端和路面板所受应力不同程度增大。In order to study the mechanical characteristics of corner void in cement concrete pavement,the fluid-solid coupling model is established by ANSYS-CFX,and the stress of the cement concretepavement under the coupling of the vehicle load and the hydrodynamic pressure is analyzed.The resultsshow that under the same traffic load,compared with the waterless state,the equivalent stress andmaximum principal stress of the crack tip in the void beneath cement concrete slab corner under the actionof hydrodynamic pressure is increased by about 30%,and the stress of the pavement roof and the bottomof the void area has a different degree of decrease,and the main tensile stress of the roof is greater than themain compressive stress of the tip.Consider the reduction of materials stiffness under water,the stress ofthe crack tip and the pavement plate in the void area increases to varying degrees.

关 键 词：水泥混凝土路面 板角脱空 流固耦合 动水压力 裂纹尖端 

分 类 号：U416.216[交通运输工程—道路与铁道工程]