[1]殷光吉,左晓宝,孙 伟,等.硫酸盐侵蚀下水泥基材料等效应力计算[J].南京理工大学学报(自然科学版),2015,39(02):167-173.
 Yin Guangji,Zuo Xiaobao,Sun Wei,et al.Numerical simulation of expansion equivalent stress in cement-based material under sulfate attack[J].Journal of Nanjing University of Science and Technology,2015,39(02):167-173.
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硫酸盐侵蚀下水泥基材料等效应力计算
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《南京理工大学学报》(自然科学版)[ISSN:1005-9830/CN:32-1397/N]

卷:
39卷
期数:
2015年02期
页码:
167-173
栏目:
出版日期:
2015-04-30

文章信息/Info

Title:
Numerical simulation of expansion equivalent stress in cement-based material under sulfate attack
作者:
殷光吉1左晓宝1孙 伟2汤玉娟1
1.南京理工大学 理学院,江苏 南京 210094; 2.东南大学 材料科学与工程学院,江苏 南京 211189
Author(s):
Yin Guangji1Zuo Xiaobao1Sun Wei2Tang Yujuan1
1.School of Sciences,NUST,Nanjing 210094,China; 2.School of Materials Science and Engineering,Southeast University,Nanjing 211189,China
关键词:
硫酸盐侵蚀 水泥基材料 力学分析模型 等效应力 结晶应力
Keywords:
sulfate attack cement-based material mechanics analysis model equivalent stress crystallization stress
分类号:
TU313
摘要:
针对硫酸盐侵蚀过程中水泥基材料的体积膨胀问题,运用盐结晶与微孔力学理论,建立了水泥基材料与其毛细孔隙内钙矾石晶体相互作用的代表性体积单元(RVE)及其力学分析模型,分析了一定钙矾石浓度下RVE内膨胀应力在微观尺度上的空间分布规律。通过均匀化方法,从宏观尺度上分析了RVE所在位置点的等效应力随钙矾石浓度的变化规律。分析结果表明,微观尺度上RVE内钙矾石组成的内球体各向受压,水泥基材料组成的外球壳径向受压、环向受拉; 宏观尺度上RVE所在位置点的径向等效应力为压应力,且随钙矾石浓度的增加而增大,而环向等效应力
Abstract:
For the volumetrical expansion of cement-based materials caused by sulfate attack,the mechanical model of the representative volume element(RVE)reflecting the interaction between cement matrix and ettringite crystal in capillary pores is established based on the microporous mechanics and the crystallization theory.The distribution of the expansive stress in RVE with a certain ettringite concentration is analyzed on a microcosmic scale.By the homogenization method,the change of the expansive equivalent stress on RVE location with the ettringite concentration is studied on a macroscopic scale.Results show that,on the microcosmic scale,the stress in the ettringite sphere of RVE is an isotropic compressive stress,the radial stress in cement matrix's spherical shell is compressive stress,and the circumferential stress in the shell is tensile stress.On the macroscopic scale,the radial equivalent stress of RVE is a compressive stress,the circumferential equivalent stress is a tensile stress,and both of them increase with the ettringite concentration.

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备注/Memo

备注/Memo:
收稿日期:2014-01-07 修回日期:2014-03-27
基金项目:国家自然科学基金(51378262); 国家“973”计划项目(2009CB623203)); 江苏省自然科学基金(BK20141396); 南京理工大学研究生科研创新/实践计划项目
作者简介:殷光吉(1990-),男,博士生,主要研究方向:混凝土材料与结构,E-mail:yinxJlove@163.com; 通讯作者:左晓宝(1968-),男,教授,博士生导师,主要研究方向:混凝土材料与结构、防灾工程,E-mail:xbzuo@sina.com。
引文格式:殷光吉,左晓宝,孙伟,等.硫酸盐侵蚀下水泥基材料等效应力计算[J].南京理工大学学报,2015,39(2):167-173.
投稿网址:http://zrxuebao.njust.edu.cn
更新日期/Last Update: 2015-04-30