[1] Tu Yongming, Lü Zhitao,. Durability design of prestressed concrete structures [J]. Journal of Southeast University (English Edition), 2005, 21 (1): 73-77. [doi:10.3969/j.issn.1003-7985.2005.01.016]
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Durability design of prestressed concrete structures(
)
预应力混凝土结构的耐久性设计方法研究
)Journal of Southeast University (English Edition)[ISSN:1003-7985/CN:32-1325/N]
- Volumn:
- 21
- Issue:
- 2005 1
- Page:
- 73-77
- Research Field:
- Civil Engineering
- Publishing date:
- 2005-03-30
Info
- Title:
- Durability design of prestressed concrete structures
- 预应力混凝土结构的耐久性设计方法研究
- Author(s):
- Tu Yongming; Lü Zhitao
- Key Laboratory of Concrete and Prestressed Concrete Structure of Ministry of Education, Southeast University, Nanjing 210096, China
- PACS:
- TU37
- DOI:
- 10.3969/j.issn.1003-7985.2005.01.016
- Abstract:
- Based on the durability characteristics of prestressed concrete structures, the durability limit states of carbonation and chloride ion attack are defined, respectively.Durability predicting models on the basis of reliability mathematics and stochastic processes are constructed, and the pure theoretical formulae of failure probability of prestressed concrete structures are analyzed.In addition, a simple durability design method for carbonation of structures is put forward.According to the analysis, the durability of prestressed concrete structures is superior to that of traditional structures.The research also indicates that the concrete cover prescribed in the current code(GB 50010—2002)is not adequate.The rational cover thickness should not be less than 35 or 45 mm according to carbonation or chloride ion attack, respectively.
- 根据预应力混凝土结构的耐久性特点, 分别定义了结构构件在碳化环境和氯离子侵蚀环境下的耐久性极限状态, 建立了以可靠性数学和随机过程为理论基础的数学模型, 并对耐久性失效概率进行了理论分析.提出了碳化环境下的预应力混凝土结构构件的耐久性实用设计方法.计算结果表明:预应力混凝土结构的耐久性优于传统钢筋混凝土结构;现行国家规范(GB 50010—2002)中规定的混凝土保护层厚度是不足的;根据碳化和氯离子侵蚀环境的不同, 混凝土保护层厚度应该分别不小于35 mm和45 mm.
References:
[1] The European Union-Brite EuRam Ⅲ.BE95—1347 General guidelines for durability design and redesign [S].DuraCrete, 2000.
[2] ACI Committee 365.ACI365.1R—00 Service-life prediction — state-of-the-art report [S].Detroit:American Concrete Institute, 2000.
[3] China Civil Engineering Society.CCES01—2004 Durability design and construction guide of concrete structure [S].Beijing:China Architecture & Building Press, 2004.(in Chinese)
[4] Lin T Y, Burns N H.Design of prestressed concrete structures.3rd Ed [M].New York:John Wiley & Sons, 1981.644.
[5] Tu Yongming.Study on the durability mechanism of modern prestressed concrete structure [D].Nanjing:College of Civil Engineering of Southeast University, 2002.(in Chinese)
[6] Niu Ditao, Shi Yuchai, Lei Yisheng.Reliability analysis and probability model of concrete carbonation [J].Journal of Xi’an Univ of Arch and Tech, 1995, 27(3):252-256.(in Chinese)
[7] Niu Ditao, Chen Yiqi, Yu Shu.Model and reliability analysis for carbonation of concrete structures [J].Journal of Xi’an Univ of Arch and Tech, 1995, 27(4):365-369.(in Chinese)
[8] Zhang Defeng, Lü Zhitao.Research on durability of modern prestressed concrete structure [A].In:Proceedings of the 5th International Symposium on the Cement and Concrete [C].Shanghai, China, 2002.603-608.
[9] China Academy of Building Research.JGJ/T 55—96 Regulations of the design of ordinary concrete’s mix proportion [S].Beijing:China Architecture & Building Press, 1996.(in Chinese)
[10] Sun Xuliang, Wang Zhanfu, Yu Hongqiang.The calculation of A and B of concrete’s mix proportion [J].Heilongjiang Science and Technology of Water Conservancy, 1999(4):19-20.(in Chinese)
[11] Wang Lisheng. A commentary on the design of concrete’s mix proportion in the concrete structure design code(GB J10—89)[J].Architecture Technology, 1994, 21(7):428-430.(in Chinese)
[12] China Academy of Building Research.GB 50010—2002 Concrete structure design code [S].Beijing:China Architecture & Building Press, 2002.(in Chinese)
Memo
- Memo:
- Biographies: Tu Yongming(1978—), male, graduate;Lü Zhitao(corresponding author), male, professor, academician of Chinese Academy of Enigneering, luzhitao@seu.edu.cn.