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

Content Provider	Springer Nature Link
Author	Chen, Baoguo Ding, Rui Zheng, Junjie Zhang, Shibiao
Copyright Year	2009
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.
Starting Page	158
Ending Page	164
Page Count	7
File Format	PDF
ISSN	16737407
Journal	Frontiers of Architecture and Civil Engineering in China
Volume Number	3
Issue Number	2
e-ISSN	16737512
Language	English
Publisher	SP Higher Education Press
Publisher Date	2009-01-13
Publisher Institution	Chinese Universities
Publisher Place	Heidelberg
Access Restriction	Subscribed
Subject Keyword	box-girder bridge field test hydration heat temperature field temperature gradient thermal stress Cities, Countries, Regions Civil Engineering
Content Type	Text
Resource Type	Article
Subject	Architecture Civil and Structural Engineering

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