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Field test on temperature field and thermal stress for prestressed concrete box-girder bridge

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Abstract

A field test was conducted to investigate the distribution of temperature field and the variation of thermal stress for a prestressed concrete (PC) box-girder bridge. The change of hydration heat temperature consists of four periods: temperature rising period, constant temperature period, rapid temperature fall period and slow temperature fall period. The peak value of hydration heat temperature increases with the increasing casting temperature of concrete; the relation between them is approximately linear. According to field tests, the thermal stress incurred by hydration heat may induce temperature cracks on the PC box-girder. Furthermore, the nonlinear distribution of temperature gradient and the fluctuation of thermal stress induced by exposure to sunlight were also obtained based on continuous in-situ monitoring. Such results show that the prevailing Chinese Code (2004) is insufficient since it does not take into account the temperature gradient of the bottom slab. Finally, some preventive measures against temperature cracks were proposed based on related studies. The conclusions can provide valuable reference for the design and construction of PC box-girder bridges.

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Authors and Affiliations

  1. School of Civil Engineering and Mechanics, Huazhong University of Science and Technology, Wuhan, 430074, China

    Baoguo Chen, Rui Ding & Junjie Zheng

  2. Shi-man Expressway Construction Headquarters of Hubei Province, Shiyan, 432000, China

    Shibiao Zhang

Authors
  1. Baoguo Chen
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  2. Rui Ding
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  3. Junjie Zheng
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  4. Shibiao Zhang
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Correspondence to Baoguo Chen.

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Translated from Journal of Huazhong University of Science and Technology (Urban Science Edition), 2007, 24(4): 83–97 [译自: 华中科技大学学报 (城市科学版)]

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Chen, B., Ding, R., Zheng, J. et al. Field test on temperature field and thermal stress for prestressed concrete box-girder bridge. Front. Archit. Civ. Eng. China 3, 158–164 (2009). https://doi.org/10.1007/s11709-009-0002-9

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  • DOI: https://doi.org/10.1007/s11709-009-0002-9

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