水泥路面板温度翘曲应力有限元分析  

Finite Element Analysis on Temperature Warping Stress of Cement Road Slab

作　　者：孙耀东[1] 李明东[1] 王龙[2] 田安国[1] 

机构地区：[1]淮海工学院土木工程学院,江苏连云港222005 [2]哈尔滨工业大学交通科学与工程学院,黑龙江哈尔滨150090

出　　处：《淮海工学院学报（自然科学版）》2015年第3期64-67,共4页Journal of Huaihai Institute of Technology:Natural Sciences Edition

基　　金：住房和城乡建设部科学技术项目计划(2015-K6-001);江苏省高校自然科学研究项目(15KJB560002)

摘　　要：利用有限元法计算了不同工况下水泥路面板的温度应力,包括不同的面板尺寸、板厚和基层顶面当量回弹模量.结果表明：板内温度应力随着板尺寸的减小而减小,板平面尺寸由4m×5m变化到3.5m×3m时,温度应力减小幅度并不大;当板平面尺寸小于3.5m×3m时,温度应力减小幅度比较大,降低幅度约为20%~30%.因此,减小板的平面尺寸能够有效地降低板内的温度应力,提高使用寿命.Temperature warping stresses of cement road slab were calculated by finite element a- nalysis under different working conditions, including different sizes, thicknesses, and equivalent resilience modulus. Results show that slab temperature warping stress decreases with the de- crease of the size of slab. The reduction of temperature stress is not large when slab size changes from 4 m×5 m to 3.5 m×3 m, while it decreases quicker when the slab plane size is less than 3.5 m×3 m, whose reduction is between 20% and 30%. Therefore, the reduction of slab plane size can effectively reduce the temperature stress in the slab and prolong the service life.

关 键 词：温度翘曲应力 有限元模型 混凝土板平面尺寸 当量回弹模量 

分 类 号：U416.216[交通运输工程—道路与铁道工程]