Please wait a minute...
J4  2012, Vol. 46 Issue (11): 1991-1997    DOI: 10.3785/j.issn.1008-973X.2012.11.009
土木工程     
基于相对信息熵的混凝土结构寿命预测方法
金伟良,李志远,许晨
浙江大学,土木工程学系,浙江 杭州 310058
Life prediction method of concrete structures based on
relativistic information entropy
JIN Wei-liang, LI Zhi-yuan, XU Chen
Department of Civil Engineering, Zhejiang University, Hangzhou 310058, China
 全文: PDF  HTML
摘要:

将相对信息熵引入多重环境时间相似理论(METS),提出一种更可靠的沿海混凝土结构寿命预测方法.氯离子侵入模型基于Fick第二定律,考虑氯离子扩散系数和表面氯离子质量分数的时间变异性.通过Monte-Carlo数值模拟方法对新建沿海混凝土结构在具有给定目标可靠度情况下的使用寿命进行预测.以某跨海大桥为研究对象,选取处于相似环境的某码头为参照物.综合参照物现场检测信息和室内加速试验信息,得到室外暴露环境下研究对象耐久性劣化参数的估计值.在耐久性极限状态目标可靠度为2.3的条件下,研究对象使用寿命的预测值为122 a,满足设计使用寿命100 a的要求.

Abstract:

A new more reliable method for service life prediction of coastal concrete structures was presented by introducing the relativistic information entropy into multi-environmental time similarity (METS) method. The chloride ion penetration model based on the Ficks second law and considered the temporal variation of diffusion coefficient and surface chloride concentration. The service life of new coastal concrete structures was calculated by Monte-Carlo simulations under a given target reliability. A sea-crossing bridge was chosen for the object structure, and a harbor was selected as the reference structure. The deterioration parameters of the object structure under outdoor exposure environment were reckoned by combining the information of the field detection and the indoor accelerated experiments. Under the condition that the target reliability of durability limit state is 2.3, the service life prediction of object structure is 122 years, meeting the requirement of 100 years.

出版日期: 2012-12-11
:  TU 375  
基金资助:

 国家自然科学基金重大国际合作与交流资助项目(50920105806);国家科技部国际科技合作资助项目(2010DFA24590);交通运输部西部交通建设科技资助项目(20113288061110);浙江省交通厅科技资助项目(2012H22).

通讯作者: 许晨,男,助理研究员.     E-mail: alan20612114@zju.edu.cn
作者简介: 金伟良(1961-),男,教授,博导.主要从事结构可靠度与混凝土结构耐久性的研究.E-mail: jinwl@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:

金伟良,李志远,许晨. 基于相对信息熵的混凝土结构寿命预测方法[J]. J4, 2012, 46(11): 1991-1997.

JIN Wei-liang, LI Zhi-yuan, XU Chen. Life prediction method of concrete structures based on
relativistic information entropy. J4, 2012, 46(11): 1991-1997.

链接本文:

http://www.zjujournals.com/eng/CN/10.3785/j.issn.1008-973X.2012.11.009        http://www.zjujournals.com/eng/CN/Y2012/V46/I11/1991

[1] 金伟良,赵羽习.混凝土结构耐久性[M].北京:科学出版社,2002:48-68.
[2] 卢振永,金伟良,王海龙,等.人工气候模拟加速试验的设计[J].浙江大学学报:工学版,2009,43(6):1071-1076.
LU Zhenyong, JIN Weiliang, WANG Hailong, et al. Similar design on accelerated test of artificial climate simulation [J]. Journal of Zhejiang University: Engineering Science, 2009, 43(6):1071-1076.
[3] JIN Weiliang, JIN Libing. A multienvironmental time similarity theory of life prediction on coastal concrete structural durability [J]. International Journal of Structural Engineering. 2009, 1(1):40-58.
[4] 金伟良, 吕清芳, 赵羽习,等.混凝土结构耐久性设计方法与寿命预测研究进展[J].建筑结构学报,2007,28(1):7-13.
JIN Weiliang. LV Qingfang, ZHAO Yuxi, et al. Research progress on the durability design and life prediction of concrete structures [J]. Journal of Building Structures, 2007, 28(1):7-13.
[5] 金立兵. 混凝土结构耐久性的多重环境时间相似理论与试验方法[D].浙江大学,2008.
JIN Libing. Multienvironment time similarity theory and its application in coastal concrete structural durability[D]. Hangzhou: Zhejiang University, 2008.
[6] WANG Xiaozhou, JIN Weiliang. Spatial variabilitybased corrosion risk assessment and strategy of repair and maintenance for RC structures[J]. International Journal of Modelling, Identification and Control,2009,8(2):171-178.
[7] JIN Weiliang, HAN Jie. Relativistic information entropy on uncertainty analysis [J]. China Ocean Engineering, 1996, 10(4):391-400.
[8] 张奕.氯离子在混凝土中的输运机理研究[D].杭州:浙江大学,2006.
ZHANG Yi. Mechanism of chloride ions transportion in concrete [D]. Hangzhou: Zhejiang University, 2006.
[9] COLLEPARDI M,MARCIALIS A,TURRIZIANI R. Penetration of chloride ions into cement pastes and concretes [J]. Journal of the American Ceramic Society, 1972,55(10):534-535.
[10] MAAGE M. Service life model for concrete structures exposed to marine environmentInitiation period [J]. ACI Material Journal, 1996, 93(6):602-608.
[11] GJORV OE. Durability design of concrete structures in severe environments [M]. London and New York: Taylor&Francis, 2009.
[12] 赵羽习,王传坤,金伟良,等. 混凝土表面氯离子质量分数时变规律试验研究[J].土木建筑与环境工程,2010,32(3):8-13.
ZHAO Yuxi, WANG Chuankun, JIN Weiliang, et al. Experimental analysis on timedependent law of surface chloride ion concentration of concrete [J]. Journal of Civil,Architectural&Environmental Engineering, 2010,32(3):8-13.
[13] PACK S, JUNG M, SONG H, et al. Prediction of time dependent chloride transport in concrete structures exposed to a marine environment [J]. Cement and Concrete Research,2010,40(2):301-312.
[14] 金伟良,袁迎曙,卫军,等.氯盐环境下混凝土结构耐久性理论与设计方法[M].北京:科学出版社,2011:8-17.
[15] 陆春华. 钢筋混凝土受弯构件开裂性能及耐久性能研究[D].浙江大学,2011.
LU Chunhua. Flexural and durability performance of RC members with transverse cracks [D]. Hangzhou: Zhejiang University,2011.
[16] GB/T 502831999.公路工程结构可靠度设计统一标准[S].北京:中国计划出版社,1999.
GB/T 502831999. Unified standard for reliability design of highway engineering structures \
[S\]. Beijing: China Planning Press,1999.
[17] 胡琦忠. 工程结构全寿命周期设计理论的核心指标研究[D].浙江大学,2009.
HU Qizhong. Key indicators of design theory on engineering structures in the whole lifecycle [D]. Hangzhou: Zhejiang University,2009.
[18] WILLIAMSON G S, WEYERS R E, BROWN M C, et al. Validation of probabilitybased chlorideinduced corrosion servicelife model [J]. ACI Materials Journal, 2008, 205(4):375-380.
[19] 王晓舟. 混凝土结构耐久性能的概率预测与模糊综合评估[D].杭州:浙江大学,2009.
WANG Xiaozhou. Probabilistic prediction and fuzzy assessment on durability behavior of concrete structures [D]. Hangzhou: Zhejiang University,2009.

[1] 金伟良, 王毅. 持续荷载与氯盐作用下钢筋混凝土梁力学性能试验[J]. J4, 2014, 48(2): 221-227.
[2] 章思颖, 金伟良, 许晨. 混凝土中胺类有机物——胍对钢筋氯盐腐蚀的作用[J]. J4, 2013, 47(3): 449-455.
[3] 姬永生, 王志龙, 徐从宇, 周敏, 赵稳. 混凝土中钢筋腐蚀过程的极化曲线分析[J]. J4, 2012, 46(8): 1457-1464.
[4] 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.
[5] 王晓舟, 金伟良, 延永东. 混凝土结构锈胀开裂预测的路径概率模型[J]. J4, 2010, 44(6): 1191-1196.
[6] 陈驹, 金伟良, 盛晓红, 等. 新型可动结点试验研究和数值分析[J]. J4, 2009, 43(10): 1878-1882.