Service Life Prediction of Prestress High Concrete Pipe Piles in Marine Environment

Abstract

Abstract: Abstract： Chlorideinduced reinforcement corrosion is the main factor in marine environment for concrete member. The service life of PHC prestress high concrete (PHC) pipe pile was divided into the initiation period and propagation periods. The initiation period, i.e., the chloride transportation time was calculated by Fick’s 2nd law using the difference method. And an elastic mechanics theory was used to solve the propagation period. The results show that the initiation period and the propagation period present linear and exponent relationship with the cover thickness, respectively. The propagation period is greatly decreased as the mortar layer thickness increases. In addition, the service life can be increased to 3 to 4 times by sealing the inner space. Finally, the calculation accuracy of the initiation period was verified by a 180 days chloride erosion test.

Key words: Key words： prestress high concrete (PHC) pipe piles, centrifugal effect, chloride ions, service life, concrete durability

CLC Number:

TU 528

YUE Zhuwen, LI Jingpei, LI Lin, SHAO Wei. Service Life Prediction of Prestress High Concrete Pipe Piles in Marine Environment[J]. Journal of Shanghai Jiao Tong University, 2016, 50(03): 370-376.

References

［1］CHEN D, MAHADEVAN S. Chlorideinduced reinforcement corrosion and concrete cracking simulation［J］. Cement & Concrete Composites, 2008, 30(3):227238. ［2］ZHANG J Y, LOUNIS Z. Nonlinear relationships between parameters of simplified diffusionbased model for service life design of concrete structures exposed to chlorides［J］. Cement and Concrete Composites, 2009, 31(8): 591600. ［3］BHARGAVA K, GHOSH A K, MORI Y, et al. Modeling of time to corrosioninduced cover cracking in reinforced concrete structures［J］. Cement And Concrete Research, 2005, 35(11): 22032218. ［4］CHERNIN L, VAL D V, VOLOKH K Y. Analytical modelling of concrete cover cracking caused by corrosion of reinforcement［J］. Materials and Structures, 2010, 43(4): 543556. ［5］邵伟, 李镜培, 岳著文. 氯离子侵蚀混凝土管桩寿命预测理论模型［J］. 硅酸盐学报, 2013, 41(5): 575581. SHAO Wei, LI Jingpei, YUE Zhuwen. Service life prediction of concrete pipe pile due to chloride ion corrosion by modeling［J］. Journal of the Chinese Ceramic Society, 2013, 41(5): 575581. ［6］阮起楠. 预应力混凝土管桩［M］. 北京: 中国建材工业出版社. 2000. ［7］李镜培, 岳著文, 邵伟, 等. 海工环境PHC管桩设计寿命计算［J］. 硅酸盐学报, 2014, 42(4):476485. LI Jingpei, YUE Zhuwen,SHAO Wei,et al. Calculation of designed lifetime of PHC pile piles in marine enviroment［J］. Journal of the Chinese Ceramic Society, 2014, 42(4):476485. ［8］CRANK J. The mathematics of diffucion［M］. 2nd ed. London: Oxford University Press, 1975. ［9］VU K, STEWART M G. Structural reliability of concrete bridges including improved chlorideinduced corrosion models［J］. Structural Safety, 2000, 22(4): 313333. ［10］YU S W, SERGI G, PAGE C L. Ionic diffusion across an interface between chloridefree and chloridecontaining cementitious materials［J］. Magazine of Concrete Research, 1993, 45(165): 257261. ［11］LIU Y P. Modeling the timetocorrosion cracking of the cover concrete in chloride contaminated reinforced concrete structures［D］. Virginia, USA: Virginia Polytechnic Institute and State University, 1996. ［12］岳著文, 李镜培, 邵伟. PHC管桩劈裂试验裂缝开展特征［J］. 哈尔滨工业大学学报, 2014, 46(10): 8186. YUE Zhuwen, LI Jingpei, SHAO Wei. Crack development characteristic of PHC pipe pile in splitting test ［J］. Journal of Harbin Institute of Technology, 2014, 46(10): 8186. ［13］王少杰, 刘福胜, 段绪胜,等. 砂浆试样单轴受压应力应变全曲线试验研究［J］. 混凝土, 2010(7): 110112. WANG Shaojie, LIU Fusheng, DUAN Xusheng, et al. Experimental investigation on complete stressstrain curve of mortar sample under uniaxial loading［J］. Concrete, 2010(7): 110112. ［14］马一平, 朱蓓蓉, 谈慕华. 水泥砂浆塑性抗拉强度与收缩开裂的关系［J］. 建筑材料学报, 2003, 6(1): 2024. MA Yiping, ZHU Beirong, TAN Muhua. Plastic tensile strength and mechanism of plastic shrinkage cracking for cement mortars［J］. Journal of Building Materials, 2003, 6(1): 2024. ［15］GB 500102010, 混凝土结构设计规范［S］. ［16］AMEY S L, JOHNSON D A, MILTENBERGER M A, et al. Predicting the service life of concrete marine structures: An environmental methodology［J］. Aci Structural Journal, 1998, 95(2): 205214. ［17］陈正, 杨绿峰, 冯庆革, 等. 高性能混凝土的氯离子扩散及服役寿命研究［J］. 建筑材料学报, 2010, 13(2):222227. CHEN Zheng, YANG Lüfeng, FENG Qingge, et al. Study of chloride dif fusion of highperformance concrete and is service life by the boundary element method［J］. Journal of Building Materials, 2010, 13(2): 222227. ［18］姬永生, 袁迎曙, 宋萌, 等. 不同锈蚀条件下混凝土内钢筋锈蚀物膨胀性能比较和机理分析［J］. 北京工业大学学报, 2011, 37(11): 16771683. JI Yongsheng, YUAN Yingshu, SONG Meng, et al. Volume expansion characteristic and mechanism of rebar corrosion products in concrete with different corrosion approaches［J］. Journal of Beijing University of Technology, 2011, 37(11): 16771683. ［19］GB 134762009, 先张法预应力混凝土管桩［S］. ［20］王显利. 氯离子侵蚀的钢筋混凝土结构锈蚀损伤［D］. 大连: 大连理工大学土木工程学院. 2008.