[1]许崇法,曹双寅,范沈龙,等.多因素作用下混凝土中性化深度统一预测模型[J].东南大学学报(自然科学版),2014,44(2):363-368.[doi:10.3969/j.issn.1001-0505.2014.02.024]
 Xu Chongfa,Cao Shuangyin,Fan Shenlong,et al.Unified prediction model of concrete neutral depth under multiple factors[J].Journal of Southeast University (Natural Science Edition),2014,44(2):363-368.[doi:10.3969/j.issn.1001-0505.2014.02.024]
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多因素作用下混凝土中性化深度统一预测模型()
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《东南大学学报(自然科学版)》[ISSN:1001-0505/CN:32-1178/N]

卷:
44
期数:
2014年第2期
页码:
363-368
栏目:
交通运输工程
出版日期:
2014-03-20

文章信息/Info

Title:
Unified prediction model of concrete neutral depth under multiple factors
作者:
许崇法12曹双寅1范沈龙3刘其伟2
1东南大学土木工程学院, 南京 210096; 2东南大学交通学院, 南京 210096; 3上海建筑设计研究院有限公司, 上海 200041
Author(s):
Xu Chongfa12 Cao Shuangyin1 Fan Shenlong3 Liu Qiwei2
1School of Civil Engineering, Southeast University, Nanjing 210096, China
2School of Transportation, Southeast University, Nanjing 210096, China
3Shanghai Architectural Design and Research Institute Co. Ltd., Shang
关键词:
混凝土结构 统一预测模型 数值模拟 混凝土中性化 多因素 耦合作用
Keywords:
concrete structure unified prediction model numerical simulation concrete neutralization multiple factors coupling effect
分类号:
U446.1
DOI:
10.3969/j.issn.1001-0505.2014.02.024
摘要:
依据扩散理论及室内试验,对碳化、酸雨、应力等单一因素和多因素耦合作用下的混凝土构件中性化深度进行了研究.通过理论研究、数值模拟和试验数据的回归分析,建立了混凝土中性化深度统一预测模型.研究表明:碳化和酸雨存在耦合现象,酸雨在某种程度上抑制碳化作用,耦合系数小于1;无论酸雨、碳化单一因素或耦合作用,混凝土中性化深度值随侵蚀时间的增加而增加,中性化深度值在前期增加比较快,继而中性化速度逐渐减小,中性化深度与时间平方根呈正比例关系;拉应力促进混凝土中性化,而压应力抑制其中性化,应力与混凝土中性化深度值之间呈近似线性关系,最后通过试验数据拟合出不同腐蚀模式下的应力影响因子.
Abstract:
On the basis of the diffusion theory and laboratory tests, the factors such as carbonization, acid rain, stress and their coupling effects on the neutral depth of the concrete component were studied. Through theoretical research, numerical simulation and regression analysis of experimental data, a concrete neutralization depth unified prediction model was established. The research results show that coupling of carbonization and acid rain exists; acid rain inhibits the carbonization to some extent; the coupling coefficient of acid rain and carbonization is less than 1. No matter acid rain, carbonization or their coupling interaction, the carbonation depth value of concrete increases as erosion time increases. The neutral velocity is fast in the early stages and decreases with the passage of time. The neutral depth is directly proportional with the square root of time. The tensile stress can promote the neutralization of concrete, while the compressive stress inhibits it. The relationship between the stress and concrete carbonation depth value is approximating the linear. Finally, stress factors under different corrosion modes were fitted based on the experimental data.

参考文献/References:

[1] 吴丹,王式功,尚可政.中国酸雨研究综述[J].干旱气象,2006,24(2):71-76.
  Wu Dan, Wang Shigong, Shang Kezheng.Progress in research of acid rain in China[J]. Journal of Arid Meteorology,2006, 24(2):71-76.(in Chinese)
[2] Papadakis V G, Vayenas C G, Fardis M N. Experimental investigation and mathematical modeling of the concrete carbonation problem[J]. Chemical Engineering Science, 1991, 46(5/6):1333-1338.
[3] Chatterji S,Snyder K A,Marchand J.Depth profiles of carbonates formed during natural carbonation[J].Cement and Concrete Research, 2002, 32(12):1923-1930.
[4] Munteran A,Bohm M.A moving-boundary problem for concrete carbonation:global existence and uniqueness of weak solutions[J].Journal of Mathematical Analysis and Applications,2009, 350(1):234-251.
[5] Wang Xiaorong,Lee Hart-Seung.A model for predicting the carbonation depth of concrete containing low-calcium ash[J].Construction and Building Materials,2009, 23(2):725-733.
[6] Okochi Hiroshi, Kameda Hideki, Hasegawa Shin-Ichi,et al.Deterioration of concrete structures by acid deposition:an assessment of the role of rainwater on deterioration by laboratory and field exposure experiments using mortar specimens[J].Atmospheric Environment,2000, 18(34): 2937-2945.
[7] Kishimoto Y, Hokoi S, Harada K, et al. Influences of acid rain on the neutralization process[C]//Proceedings of the 3rd International Building Physics Conference-Research in Building Physics and Building Engineering. Montreal, QC,Canada,2006: 209-216.
[8] Niu Jiangang, Zhang Zhen, Niu Ditao. Experiment design on concrete under load attacked by acid rain[C]//Advanced Materials Research. Haikou, China,2011:5760-5763.
[9] 高丽.碳化和酸雨共同作用下混凝土耐久性研究[D].西安:西安建筑科技大学土木工程学院,2008.
[10] 许崇法,范沈龙,曹双寅,等.持荷混凝土构件耐久性试验加载装置应用技术[J].实验力学,2013,28(4):469-474.
  Xu Chongfa, Fan Shenlong, Cao Shuangyin, et al. Application technology of loading equipment for durability testing of concrete component[J].Journal of Experimental Mechanics,2013, 28(4):469-474.(in Chinese)
[11] 许崇法,曹双寅,范沈龙,等. 应力、碳化及酸雨作用下混凝土中性化试验研究[J]. 土木工程学报,2014.(待发表)
  Xu Chongfa,Cao Shuangyin,Fan Shenlong,et al.Experimental study of the concrete neutralization under stress, carbonization and acid rain [J].China Civil Engineer Journal, 2014.(to appear)
[12] 牛荻涛,周浩爽,牛建刚. 承载混凝土酸雨侵蚀中性化试验研究[J]. 硅酸盐通报,2009,28(3):411-415.
  Niu Ditao,Zhou Haoshuan,Niu Jiangang. Investigation of neutralization of concrete under loads by accelerated acid rain test [J].Bulletin of the Chinese Ceramic Society,2009, 28(3):411-415.(in Chinese)
[13] 周飞鹏. 混凝土的酸雨腐蚀模型研究[D]. 大连:大连理工大学土木水利学院,2005.
[14] 张扬. 酸雨环境下粉煤灰混凝土耐久性研究[D]. 西安:西安建筑科技大学土木工程学院,2008.
[15] 张誉,蒋利学. 基于碳化机理的混凝土碳化深度实用数学模型[J]. 工业建筑,1998,28(1):16-47.
  Zhang Yu, Jiang Lixue. A practical mathematical model of concrete carbonation depth based on the mechanism[J].Industrial Construction,1998, 28(1):16-47.(in Chinese)
[16] 牛狄涛. 混凝土结构耐久性和寿命预测[M].北京:科学出版社,2003:21-45.
[17] 龚胜辉. 酸雨和碳化环境下C25高性能混凝土耐蚀性能研究[D]. 长沙:中南大学土木工程学院,2010.

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备注/Memo

备注/Memo:
收稿日期: 2013-08-24.
作者简介: 许崇法(1972—),男,博士生;曹双寅(联系人),男,博士,教授,博士生导师,101000873@seu.edu.cn.
基金项目: 国家重点基础研究发展计划(973计划)资助项目(2012CB026200).
引用本文: 许崇法,曹双寅,范沈龙,等.多因素作用下混凝土中性化深度统一预测模型[J].东南大学学报:自然科学版,2014,44(2):363-368. [doi:10.3969/j.issn.1001-0505.2014.02.024]
更新日期/Last Update: 2014-03-20