预应力混凝土梁疲劳预应力损失探索性试验研究

doi:10.3969/j.issn.1002-0268.2012.12.013

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Abstract To study the fatigue prestress loss of prestressed concrete beams, four bonded post-tensioned bonded concrete simple supported beams were designed and constructed for constant-amplitude fatigue load displacement tests. Strain sensors were embedded into the pre-pressed zone of the mid-span of the simply supported concrete test beams, and the fatigue prestress losses were calculated by strain increments in the concrete. The experimental results show that the phenomenon of fatigue prestress loss was present and primarily occurred in the forepart of cyclic fatigue test, and appeared to fit an exponential function law regarding cyclic fatigue load under dynamic loading for prestressed concrete beams. The preliminary results may be useful as a reference to improve the theory for designing prestressd concrete bridges.

Key words： bridge engineering prestressed concrete beam curve fitting fatigue prestress loss experimental study

Received: 15 November 2013

Fund:Supported by the Innovation and HR Training Project of Research Institute of the Ministry of Transport (No.2008-2016)

Corresponding Authors: ZENG Ding, d.zeng@rioh.cn E-mail: d.zeng@rioh.cn

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	ZENG Ding
	WANG Guo-liang
	XIE Jun
	ZHENG Xiao-hua

Cite this article:

ZENG Ding,WANG Guo-liang,XIE Jun, et al. Exploratory Experimental Study on Fatigue Prestress Loss of Prestressed Concrete Beams[J]. Journal of Highway and Transportation Research and Development, 2014, 8(2): 37-41.

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http://manu27.magtech.com.cn/Jwk_gljtkj_en/EN/10.3969/j.issn.1002-0268.2012.12.013 OR http://manu27.magtech.com.cn/Jwk_gljtkj_en/EN/Y2014/V8/I2/37

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