[1]孙香花,王佳林,左晓宝,等.荷载-环境耦合作用下钢筋混凝土柱退化过程分析[J].南京理工大学学报(自然科学版),2018,42(02):133.[doi:10.14177/j.cnki.32-1397n.2018.42.02.001]
 Sun Xianghua,Wang Jialin,Zuo Xiaobao,et al.Numerical investigation on degradation of reinforced concrete columnsubjected to coupling of loading and environment[J].Journal of Nanjing University of Science and Technology,2018,42(02):133.[doi:10.14177/j.cnki.32-1397n.2018.42.02.001]
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荷载-环境耦合作用下钢筋混凝土柱退化过程分析()
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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:
42卷
期数:
2018年02期
页码:
133
栏目:
出版日期:
2018-04-30

文章信息/Info

Title:
Numerical investigation on degradation of reinforced concrete columnsubjected to coupling of loading and environment
文章编号:
1005-9830(2018)02-0133-09
作者:
孙香花王佳林左晓宝殷光吉汤玉娟
南京理工大学 理学院,江苏 南京 210094
Author(s):
Sun XianghuaWang JialinZuo XiaobaoYin GuangjiTang Yujuan
School of Science,Nanjing University of Science and Technology,Nanjing 210094,China
关键词:
钢筋混凝土柱 荷载 硫酸盐 氯盐 承载力退化 应力重分布
Keywords:
reinforced concrete columns loading sulfate chloride bearing capacity degradation stress redistribution
分类号:
TU375
DOI:
10.14177/j.cnki.32-1397n.2018.42.02.001
摘要:
针对荷载与环境因素耦合作用下钢筋混凝土柱承载性能退化及柱截面应力重分布问题,以受轴压荷载和硫酸盐、氯盐侵蚀耦合作用的钢筋混凝土柱为研究对象,根据硫酸盐侵蚀混凝土损伤机理,建立了基于Kent-Park模型的混凝土腐蚀损伤本构模型。基于氯盐导致的钢筋锈蚀机理,给出了混凝土内锈蚀钢筋有效截面积的计算公式。最后,采用纤维网格法建立了荷载与硫酸盐、氯盐耦合作用下钢筋混凝土柱承载力和柱截面应力的计算方法,并进行了数值分析。结果表明,在荷载-环境耦合作用过程中,钢筋混凝土柱承载力逐渐减小,且柱截面应力发生了重分布现象,钢筋和未腐蚀混凝土的应力随腐蚀时间的增加而增大,而腐蚀后的混凝土应力由表及里逐渐增加。
Abstract:
In order to investigate the bearing capacity degradation and the stress redistribution at the cross section of the reinforced concrete column under the coupling actions of loading and environment,based on the Kent-Park constitutive model,the time-dependent corrosion constitutive model of concrete is established according to the sulfate-induced concrete degradation mechanism. On the chloride-induced steel corrosion mechanism,the calculation formula of the effective cross-sectional area of corroded steel is presented. Finally,the fiber model is used to simulate the capacity and the stress of the cross section in the reinforced concrete column. Numerical results show that,with the increasing of corrosion time,the bearing capacity of the reinforced concrete column decreases and there produces stress redistribution at its cross section; the stresses of the steel bar and uncorroded concrete increase and the stress of the corroded concrete gradually increases from surface to internal of the cross section of the column.

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备注/Memo

备注/Memo:
收稿日期:2017-06-01 修回日期:2017-11-06
基金项目:国家自然科学基金(51378262; 51778297)
作者简介:孙香花(1965-),女,高级实验师,主要研究方向:建筑材料与结构,E-mail:sxianghua@sina.com。
引文格式:孙香花,王佳林,左晓宝,等. 荷载-环境耦合作用下钢筋混凝土柱退化过程分析[J]. 南京理工大学学报,2018,42(2):133-141.
投稿网址:http://zrxuebao.njust.edu.cn
更新日期/Last Update: 2018-04-30