砂浆内钢筋锈胀应力监测与数值模拟研究

秦一琦; 金祖权; 李师财; 高源; 鹿婷; 孙涛

doi:10.11835/j.issn.2096-6717.2022.027

您当前的位置：

首页 >

文章列表页 >

砂浆内钢筋锈胀应力监测与数值模拟研究

土木工程 | 更新时间：2023-03-07

- 砂浆内钢筋锈胀应力监测与数值模拟研究
- Experimental and numerical simulation study on corrosion evolution of steel bar in mortar
- 土木与环境工程学报 2023年45卷第2期页码：179-186
- 作者机构：
  
  青岛理工大学土木工程学院，山东青岛 266520
- 作者简介：
  
  秦一琦（1997- ），女，主要从事海洋环境混凝土结构耐久性研究，E-mail： tumuqyq@163.com。
  金祖权（通信作者），男，教授，博士生导师，E-mail：jinzuquan@126.com。
- 基金信息：
  
  国家自然科学基金(52078259;5191102012)
- DOI：10.11835/j.issn.2096-6717.2022.027
  中图分类号： TU511.3
- 收稿：2021-11-22，
  
  纸质出版：2023-04-25
- 稿件说明：
移动端阅览
秦一琦, 金祖权, 李师财, 等. 砂浆内钢筋锈胀应力监测与数值模拟研究[J]. 土木与环境工程学报, 2023,45(2):179-186.

QIN Yiqi, JIN Zuquan, LI Shicai, et al. Experimental and numerical simulation study on corrosion evolution of steel bar in mortar[J]. Journal of Civil and Environmental Engineering, 2023, 45(2): 179-186.
秦一琦, 金祖权, 李师财, 等. 砂浆内钢筋锈胀应力监测与数值模拟研究[J]. 土木与环境工程学报, 2023,45(2):179-186. DOI： 10.11835/j.issn.2096-6717.2022.027.

QIN Yiqi, JIN Zuquan, LI Shicai, et al. Experimental and numerical simulation study on corrosion evolution of steel bar in mortar[J]. Journal of Civil and Environmental Engineering, 2023, 45(2): 179-186. DOI： 10.11835/j.issn.2096-6717.2022.027.

摘要

钢筋锈蚀是导致海洋混凝土结构失效破坏的最主要原因，探明钢筋锈胀应力发展及其诱导混凝土开裂的过程对于钢筋混凝土服役寿命预测有重要意义。采用内掺盐与恒电位加速砂浆内钢筋锈蚀，通过砂浆外不锈钢圆环环贴应变片实现钢筋锈蚀过程的应变监测，并计算锈胀应力，利用COMSOL软件分析混凝土中钢筋锈胀应力发展及混凝土锈胀开裂历程。结果表明：利用有限元与钢筋锈胀时变径向位移加载，实现钢筋混凝土锈胀开裂过程的模拟，模拟结果与试验结果基本一致；不考虑砂浆、钢筋的非均匀性及锈蚀产物对开裂砂浆的充填效应，模拟结果不能真实反映锈胀应力的波动性及锈胀应力释放与缓慢增加的过程；提高砂浆强度、减小钢筋直径可以有效延缓钢筋锈胀导致混凝土开裂的时间。

Abstract

Reinforcement corrosion is the primary cause of the failure of marine concrete structures. Thus

it is necessary to explore the development of corrosion expansion stress and the process of induced concrete cracking

which is beneficial to the service life prediction of reinforced concrete. In the experiments

the reinforcement corrosion in mortar is accelerated by adding salt and using constant potential. The strain in the reinforcement corrosion process is monitored by the strain gauge attached to the stainless steel ring outside the mortar to calculate the corrosion expansion stress. The COMSOL software is used to analyze the development of corrosion expansion stress in concrete and the whole concrete cracking process induced by reinforcement corrosion. The results show that the finite element method and the time-varying radial displacement loading method can be used in simulating and testing the corrosion expansion and cracking process of reinforced concrete respectively

the results of which are basically consistent. Without considering the inhomogeneity of mortar and reinforcement and the filling effect of corrosion products on cracked mortar

the simulation results fail to reflect the fluctuation and the process of release and gradual increase of corrosion expansion stress. In addition

by increasing the mortar strength and decreasing the reinforcement diameter

corrosion expansion and cracking of reinforcement can be effectively delayed.

关键词

Keywords

references

李哲 , 金祖权 , 邵爽爽 , 等 . 海洋环境下混凝土中钢筋锈蚀机理及监测技术概述 [J]. 材料导报 , 2018 , 32 ( 23 ): 4170 - 4181 .

LI Z , JIN Z Q , SHAO S S , et al . A review on reinforcement corrosion mechanics and monitoring techniques in concrete in marine environment [J]. Materials Review , 2018 , 32 ( 23 ): 4170 - 4181 . (in Chinese)

柯伟 . 中国工业与自然环境腐蚀调查的进展 [J]. 腐蚀与防护 , 2004 , 25 ( 1 ): 1 - 8 .

KE W . Progress in public inquiry concerning corrosion in Chinese industrial and natural environments [J]. Corrosion & Protection , 2004 , 25 ( 1 ): 1 - 8 . (in Chinese)

宋立元 . 海洋钢筋混凝土结构氯离子腐蚀耐久性研究 [D]. 辽宁大连 : 大连理工大学 , 2009 .

SONG L Y . Study on chloride corrosion durability of reinforced concrete marine structures [D]. Dalian, Liaoning : Dalian University of Technology , 2009 . (in Chinese)

许小奕 . 钢筋非均匀锈蚀作用下混凝土锈裂行为研究 [D]. 杭州 : 浙江大学 , 2020 .

XU X Y . Experimental study on the concrete cracking behavior due to rebar non-uniforin corrosion [D]. Hangzhou : Zhejiang University , 2020 . (in Chinese)

WANG X X , JIN Z Q , LIU J P , et al . Research on internal monitoring of reinforced concrete under accelerated corrosion, using XCT and DIC technology [J]. Construction and Building Materials , 2021 , 266 : 121018 .

陈永丰 . 混凝土中钢筋锈蚀应力应变场分析 [D]. 山东青岛 : 青岛理工大学 , 2016 .

CHEN Y F . Stress and strain field induced by corrosion of steel bar in concrete [D]. Qingdao, Shandong : Qingdao Tehcnology University , 2016 . (in Chinese)

赵羽习 , 金伟良 . 混凝土锈胀时刻钢筋锈蚀率的数值分析方法 [J]. 浙江大学学报(工学版) , 2008 , 42 ( 6 ): 1080 - 1084 .

ZHAO Y X , JIN W L . Numerical-based method for calculating reinforcement corrosion at concrete cover cracking due to corrosion [J]. Journal of Zhejiang University (Engineering Science) , 2008 , 42 ( 6 ): 1080 - 1084 . (in Chinese)

李海波 , 鄢飞 , 赵羽习 , 等 . 钢筋混凝土结构开裂时刻的钢筋锈胀力模型 [J]. 浙江大学学报(工学版) , 2000 , 34 ( 4 ): 415 - 422 .

LI H B , YAN F , ZHAO Y X , et al . Model of corroded expansion force at cracking on reinforced concrete structures [J]. Journal of Zhejiang University (Engineering Science) , 2000 , 34 ( 4 ): 415 - 422 . (in Chinese)

金浏 . 细观混凝土分析模型与方法研究 [D]. 北京 : 北京工业大学 , 2014 .

JIN L . Study on meso-scopic model and analysis method of concrete [D]. Beijing : Beijing University of Technology , 2014 . (in Chinese)

王坤 . 混凝土内钢筋非均匀锈蚀及其锈胀开裂研究 [D]. 杭州 : 浙江大学 , 2018 .

WANG K . Study on the non-uniform corrosion distribution of steel bars and corrosion-induced cracking of reinforced concrete structures [D]. Hangzhou : Zhejiang University , 2018 . (in Chinese)

李倩 . 钢筋锈蚀作用下混凝土保护层胀裂过程研究 [D]. 辽宁大连 : 大连理工大学 , 2018 .

LI Q . The research of the process about corrosion-induced cracking of concrete cover [D]. Dalian, Liaoning : Dalian University of Technology , 2018 . (in Chinese)

GOLUBEVA O Y , PAVLOVA S V , YAKOVLEV A V . Adsorption and in vitro release of vitamin B 1 by synthetic nanoclays with montmorillonite structure [J]. Applied Clay Science , 2015 , 112/113 : 10 - 16 .

CUI Z , ALIPOUR A . Concrete cover cracking and service life prediction of reinforced concrete structures in corrosive environments [J]. Construction and Building Materials , 2018 , 159 : 652 - 671 .

浏览量

下载量

CSCD

文章被引用时，请邮件提醒。

提交

工具集

关联资源

深基坑注水与水下开挖设计计算方法

水平荷载作用下能量桩群桩的变形特性

负温环境下电养护对砂浆成型温度及早期强度的影响

液化夹层对浅基础结构隔震响应的影响

降雨作用下三维矿山边坡的力学状态响应