Please wait a minute...
浙江大学学报(工学版)
J4  2012, Vol. 46 Issue (8): 1444-1449    DOI: 10.3785/j.issn.1008-973X.2012.08.014
土木工程     
基于热力耦合的钢筋混凝土锈胀开裂分析
项贻强1, 程坤1, 郭冬梅1, 李威2, 林士旭2
1. 浙江大学 土木工程系,浙江 杭州 310058; 2. 台州市公路管理处,浙江 台州 318000
Analysis of RC bulge cracking by coupled
thermal-mechanical method
XIANG Yi-qiang1, CHENG Kun1, GUO Dong-mei1, LI Wei2, LIN Shi-xu2
1. Department of Civil Engineeering, Zhejiang University, Hangzhou 310058, China；
2. Department of Taizhou Highway Management, Taizhou 318000, China
 全文: PDF 
摘要：

为对锈蚀钢筋混凝土构件开裂问题进行分析,鉴于氯离子扩散控制方程与瞬态热传导控制方程的相似性,根据传统的Fick定律和已有的氯盐环境下钢筋非均匀锈胀模型以及热弹性力学理论,提出钢筋混凝土锈胀开裂模拟的热力耦合方法.对氯离子的扩散采用瞬态热传导方法进行分析模拟,提取各时间步钢筋单元表面的氯离子质量浓度即温度作为混凝土的温度荷载,引入钢筋锈胀的时变等效温度膨胀系数,采用升温膨胀对钢筋的锈胀以及由此引起的混凝土开裂过程进行有限元分析.数值算例表明,该方法可以有效地模拟和分析钢筋的非均匀锈胀和混凝土的裂缝扩展行为.
关键词： 钢筋混凝土结构;  氯离子;  钢筋锈蚀;  混凝土开裂;  热力耦合    
Abstract:

 In order to solve the crack problems of corroded reinforced concrete members by the finite element method(FEM), this study presents a coupled thermal-mechanical method for cracking analysis of corroded reinforced concrete (RC) structures by considering the similarity of differential equations of chloride diffusion and control equations of transient heat transfer, which is based on the conventional Fick’s law, existing chloride-induced non-uniform expansion model of corroded reinforcement and thermal-elasticity theory. Chloride diffusion was simulated by using the transient heat transfer method. The chloride ion concentration at the reinforcement surface was obtained and taken as a temperature load of concrete at each time step by solving the relative differential equations and FEM. After introducing the equivalent timevarying coefficient of thermal expansion, corrosion-induced reinforcement expansion and concrete cracking were simulated by the thermal expansion method. Numerical results show that this method can be effectively used to simulate and analyze the non-uniform corrosion of reinforcement and crack propagation behavior.
Key words: reinforced concrete structures    chloride    reinforcement corrosion    concrete cracking    coupled thermal-mechanical method
出版日期: 2012-09-03
:  TU 375  
基金资助:

浙江省交通运输厅2010科技计划资助项目（2010H63）.
作者简介: 项贻强（1959—）,男,教授、博导,主要从事桥隧工程的全寿命设计理论、监测与养护管理、悬浮隧道及古桥的保护研究. E-mail: xiangyiq@zju.edu.cn
服务　　
把本文推荐给朋友
加入引用管理器
E-mail Alert
RSS
作者相关文章　　

引用本文:

项贻强, 程坤, 郭冬梅, 李威, 林士旭. 基于热力耦合的钢筋混凝土锈胀开裂分析[J]. J4, 2012, 46(8): 1444-1449.

XIANG Yi-qiang, CHENG Kun, GUO Dong-mei, LI Wei, LIN Shi-xu. Analysis of RC bulge cracking by coupled
thermal-mechanical method. J4, 2012, 46(8): 1444-1449.

链接本文:

http://www.zjujournals.com/xueshu/eng/CN/10.3785/j.issn.1008-973X.2012.08.014    或    http://www.zjujournals.com/xueshu/eng/CN/Y2012/V46/I8/1444

［1］ CHEN D, MAHADEVAN S. Chlorideinduced reinforcement corrosion and concrete cracking simulation ［J］. Cement and Concrete Composites, 2008, 30(3): 227-238.
［2］ MARSAVINA L, AUDENAERT K, DE SCHUTTER G, et al. Experimental and numerical determination of the chloride penetration in cracked concrete ［J］. Construction and Building Materials, 2009, 23(1): 264-274.
［3］ FU Chuanqing, JIN Xianyu, JIN Nanguo. Modeling of chloride ions diffusion in cracked concrete ［C］∥ Proceedings of the 12th International Conference on Engineering Construction, and Operations in Challenging Environments. United States: American Society of Civil Engineers, 2010: 3579-3589.
［4］ 田冠飞,安雪晖.钢筋存在对氯离子扩散阻滞影响的有限元分析［J］.混凝土,2006,(5): 1-3.
TIAN Guanfei, AN Xuehui. Finite element analysis of steel obstruction effects on chloride diffusion in concrete ［J］. Concrete, 2006, (5): 1-3.
［5］ 王显利.氯离子侵蚀的钢筋混凝土结构锈蚀损伤［D］.大连：大连理工大学,2007: 43-56.
WANG Xianli. Concrete damage of RC structures ingressed by chloride ［D］. Dalian: Dalian University of Technology, 2007: 43-56.
［6］ 夏宁,任青文.混凝土中钢筋不均匀锈胀的数值模拟及锈蚀产物量的预测［J］.水利学报,2006, 37(01): 70-74.
XIA Ning, REN Qingwen. Numerical simulation of cover layer cracking due to expansion of nonuinform corrosion of reinforcement bar and prediction of corrosion products ［J］. Journal of Water Resources Engineering, 2006, 37(01): 70-74.
［7］ 王桂林,陈庆玉,徐洪,等.钢筋非均匀锈蚀轮廓线理论解［J］.重庆大学学报,2010,33(02): 87-91.
WANG Guilin, CHEN Qingyu, XU Hong, et al. Theoretical contour line of reinforcement bar of nonuniform corrosion ［J］. Journal of Chongqing University, 2010, 33(02): 87-91.
［8］ 陆春华,赵羽习,金伟良.锈蚀钢筋混凝土保护层锈胀开裂时间的预测模型［J］.建筑结构学报, 2010,31(02): 85-92.
LU Chunhua, ZHAO Yuxi, JIN Weiliang. Modeling of time to corrosioninduced cover cracking in reinforced concrete structures ［J］. Journal of Building Structures, 2010, 31(02): 85-92.
［9］ DU Y G, CHAN A H C, CLARK L A. Finite element analysis of the effects of radial expansion of corroded reinforcement ［J］. Computers and Structures, 2006, 84(13/14): 917-929.
［10］ JANG B S, OH B H. Effects of nonuniform corrosion on the cracking and service life of reinforced concrete structures ［J］. Cement and Concrete Research. 2010, 40(9): 1441-1450.
［11］ 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(06): 1080-1084.
ZHAO Yuxi, JIN Weiliang. Numericalbased method for calculating reinforcement corrosion at concrete cover cracking due to corrosion ［J］. Journal of Zhejiang University: Engineering Science, 2008, 42(06): 1080-1084.
［12］ 李海波,鄢飞,赵羽习.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 Haibo, YAN Fei, ZHAO Yuxi. Model of corroded expansion force at cracking on reinforced concrete structures ［J］. Journal of Zhejiang University: Engineering Science, 2000, 34(4): 415-422.
［13］ DAGHER H J, KULENDRAN S. Finite element modeling of corrosion damage in concrete structures ［J］. ACI Structural Journal, 1992, 89(6): 699-708.
［14］ CHERNIN L, VAL D V. Prediction of corrosioninduced cover cracking in reinforced concrete structures ［J］. Construction and Building Materials, 2011, 25(4): 1854-1869.
［15］ MOLINA F J, ALONSO C, ANDRADE C. Cover cracking as a function of rebar corrosion: part 2numerical model ［J］. Materials and Structures, 1993, 26(163): 532-548.
［16］ 张伟平,张誉.混凝土中钢筋锈胀过程的计算机仿真分析［J］.同济大学学报:自然科学版,2001,29(11): 1374-1377.
ZHANG Weiping, ZHANG Yu. Simulation analysis of cover splitting process due to expansion action of corrosion ［J］. Journal of Tongji University: Natural Science, 2001, 29(11): 1374-1377.
［17］ 孔祥谦.有限单元法在传热学中的应用［M］.2版.北京:科学出版社,1981: 1-3.
［18］ LIU T, WEYERS R W. Modeling the dynamic corrosion process in chloride contaminated concrete structures ［J］. Cement and Cement and Concrete Research, 1998, 28(3): 365-379.
［19］ 叶秀汉.动力机械热应力理论和应用［M］.上海:上海交通大学出版社,1987: 64-83.
［20］ GB 500102002.混凝土结构设计规范［S］.北京:中国建筑工业出版社, 2002.
GB500102002. Code for design of concrete structures ［S］. Beijing: China Construction Press, 2002.
［21］ LIU Y, WEYERS R E. Modeling the timetocorrosion cracking in chloride contaminated reinforced concrete structures ［J］. ACI Materials Journal, 1998, 95(6): 675-681.
[1] 董运宏, 淳庆, 许先宝, 王建国, 黄珊. 民国建筑锈胀开裂时的临界锈蚀深度[J]. 浙江大学学报(工学版), 2017, 51(1): 27-37.
[2] 金伟良,黄楠,许晨,毛江鸿. 双向电渗对钢筋混凝土修复效果的试验研究——保护层阻锈剂、氯离子和总碱度的变化规律[J]. 浙江大学学报(工学版), 2014, 48(9): 1586-1594.
[3] 高玖藜, 柳景青, 张土乔, 李聪, 蒋伟. 水中氯离子和腐植酸对管网铁释放的影响[J]. J4, 2013, 47(8): 1321-1328.
[4] 王雪松, 金贤玉, 田野, 金南国. 基于非均匀锈蚀的带肋钢筋黏结性能[J]. J4, 2013, 47(1): 154-161.
[5] 鲁彩凤, 袁迎曙, 季海霞, 姬永生. 海洋大气中氯离子在粉煤灰混凝土中的传输规律[J]. J4, 2012, 46(4): 681-690.
[6] 孙晓燕, 潘宏, 王海龙, 王建秀. 大气环境下服役公路梁桥结构时变可靠度分析[J]. J4, 2012, 46(4): 643-649.
[7] 田浩,陈艾荣,陈亮. 寿命期内混凝土桥梁性能演变分析[J]. J4, 2012, 46(1): 52-57.
[8] 薛文, 金伟良, 横田弘. 养护条件与暴露环境对氯离子传输的耦合作用[J]. J4, 2011, 45(8): 1416-1422.
[9] 章永乐,蒋建群,刘加进,王振宇. 框架结构地震损伤评估与抗震设计[J]. J4, 2011, 45(7): 1294-1300.
[10] 蒋梅玲, 金贤玉, 田野, 金南国. 基于断裂力学和损伤理论的混凝土开裂模型[J]. J4, 2011, 45(5): 948-953.
[11] 金伟良,许晨. 钢筋脱钝氯离子阈值快速测定新方法[J]. J4, 2011, 45(3): 520-525.
[12] 延永东, 金伟良, 王海龙. 饱和状态下开裂混凝土内的氯离子输运[J]. J4, 2011, 45(12): 2127-2133.
[13] 薛鹏飞, 项贻强. 修正的氯离子在混凝土中的扩散模型及其工程应用[J]. J4, 2010, 44(4): 831-.
[14] 卢振永, 金伟良, 王海龙, 等. 人工气候模拟加速试验的相似性设计[J]. J4, 2009, 43(6): 1071-1076.
[15] 张奕 姚昌建 金伟良. 干湿交替区域混凝土中氯离子分布随高程的变化规律[J]. J4, 2009, 43(2): 360-365.