基于FWD的水泥路面板角脱空弯沉分析  

Deflection Analysis of Cement Pavement Slab Corner Void Based on FWD

作　　者：戴震 刘真 王翔 王双平 DAI Zhen;LIU Zhen;WANG Xiang;WANG Shuang-ping(China Design Group Co,Ltd,Nanjing 210001,China;School of Transportation,Southeast University,Nanjing 211189,China)

机构地区：[1]华设设计集团股份有限公司,南京210001 [2]东南大学交通学院,南京211189

出　　处：《建材世界》2023年第6期124-127,131,共5页The World of Building Materials

摘　　要：论文研究了水泥路面结构参数以及脱空尺寸对落锤式弯沉仪(Falling Weight Deflectometer,FWD)的检测结果的影响。基于ABAQUS软件建立水泥路面板角脱空有限元模型,采用弹簧单元法模拟路面板之间的接缝传荷,通过移除基层脱空区域的材料建立不同脱空尺寸的模型,并结合正交试验对弯沉进行各影响因素敏感性分析。结果表明,板角脱空尺寸对板边中点弯沉无显著影响,板边中点弯沉受地基反应模量影响最大,板角弯沉和弯沉比受接缝刚度和板角脱空尺寸影响比较显著。The influence of cement pavement structure parameters and void size on the deflection results of FWD(Falling Weight Deflectometer)was discussed.Based on ABAQUS software,the finite element model of cement pavement slab corner void was established.The spring element method was used to simulate the joint load transfer between pavement slabs.The model of different void sizes was established by removing the material of the base void area,and the sensitivity analysis of each influencing factor of deflection was carried out by orthogonal test.The results showed that the corner void size has no significant effect on the mid-point deflection of the edge of the slab.The mid-point deflection of the edge of the slab is most affected by the reaction modulus of the foundation.The corner deflection and deflection ratio are significantly affected by the joint stiffness and the corner void size.

关 键 词：水泥路面 板角脱空 有限元 弯沉 

分 类 号：U416.216[交通运输工程—道路与铁道工程] U418.6