摘要
利用ANSYS有限元软件建立水泥混凝土路面模型,以面层平面尺寸和板厚为主要变化参数,计算面层荷载应力、温度翘曲应力及弯沉量,分别得出了四边自由板不同平面尺寸、不同板厚、不同基层厚度、不同基层模量和不同地基模量对面层应力的影响规律。结果表明:相同轴载作用下,道路硅酸盐水泥混凝土路面板最大主应力比普通硅酸盐水泥混凝土路面板增加6%左右,弯沉量会减小3%左右;道路硅酸盐水泥混凝土路面板三维尺寸中,板厚对面板受力影响最大,板厚每增加2cm,面板最大主应力减小6%左右,弯沉量减小3%左右;增加基层厚度和模量,可以减小路面板荷载应力、弯沉量和温度作用引起板的翘曲量;地基模量每增加30 MPa,路面板荷载应力减小4%左右,温度应力基本不变,路面板的变形量会减少14%左右。
ANSYS is used to establish the cement concrete pavement model,the surface plane size and thickness being as the main parameters,the surface load stress,temperature stress and deflection are calculated,the influencing rules of four free plate size,different planes with different thickness and different base thickness,base modulus and different foundation moduluson the surface layer stress are obtained.The results show that under the same axial loads,the maximum principal stress(S1)of road Portland cement concrete slab increases by about 6% compared with ordinary Portland cement concrete pavement,and the deflection reduces about 3%;in the three dimensions of road Portland cement concrete pavement panel,thickness has the largest influence on the pavement force bearing,when the thickness increases by 2 cm,the maximum principal stress will decrease by 6%,and the maximum deflection decreases by about 3%;increase the thickness and modulus of the base course can reduce the panel load stress,deflection volume and temperature induced warpage of board;each increase of 30 MPa foundation modulus,pavement load stress reduces by about 4%,the temperature stress and deformation basically unchanged,and the deformation volume of road surface will be reduced by about 14%.
作者
朱华胜
曾晓辉
刘海川
凌晨博
潘璋
陈鲤波
康俊
陈洪章
彭崇斌
王俊
ZHU Hua-sheng;ZENG Xiao-hui;LIU Hai-chuan;LING Chen-bo;PAN Zhang;CHEN Li-bo;KANG Jun;CHENG Hong-zhang;PENG Chong-bin;WANG Jun(School of Civil Engineering,Southwest Jiaotong University,Chengdu 610031,China;YibinLingang Construction Co.Ltd.,Yibin 644002,China)
出处
《公路》
北大核心
2019年第1期1-8,共8页
Highway
基金
"十三五"国家重点研发计划项目
项目编号2016YFB0303603-4
关键词
道路硅酸盐水泥
水泥混凝土路面
有限元
荷载应力
弯沉量
Portland cement for road
cement concrete pavement
finite element
load stress
deflection
