湿/热条件下的CFRP筋粘结型锚具性能研究

doi:10.11896/cldb.19100008

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Abstract In order to investigate the effect of temperature and moisture conditions on the anchoring performance of the bonded anchorage for CFRP (Carbon Fiber Reinforced Polymer) tendons, tensile tests were carried out on the anchoring system with different moisture-conditioning (i.e., dry state at 23 ℃, salt solution immersion at 23 ℃ and salt solution immersion at 50 ℃) and different immersion durations. Twelve pre-conditioned bonded anchorages were tested, and their water absorption, ultimate tensile capacity, average interfacial shear strength, system slip and the damage development at the tendon/bonding medium interface were analyzed. With that, a prediction model for the ultimate tensile capacity of the bonded anchorage was established, accounting for the influence of temperature and moisture conditions. The results show that the ultimate tensile capacity and the interfacial shear strength of the bonded anchorage decrease with respect to the temperature and immersion duration. The ductility and interfacial performance of anchoring system are reduced with respect to hygrothermal conditions. The temperature is especially significant for the damage development in the anchor zone. The water absorption of the anchoring system under different temperatures follows Fick's second law. And the proposed prediction model is in line with the experimental results substantially.

Key words： temperature or moisture conditions carbon fiber reinforced polymer (CFRP) tendon bonded anchorage anchoring performance

Published: 02 December 2020

CLC number:

TB332

Fund:This work was financially supported by the National Natural Science Foundation of China (51508235),the Scientific Research Project (Y18A153).

About author:: Guihua Xiereceived her Ph.D. degree in June 2009 from Central South University in road and railway engineering. She is a member of Jiangsu Composite Mate-rials Committee. From January 2018 to January 2019, she visited The University of Queensland, Australia, focusing on the research of composite material and composite structure.Yue Sunis studying at Jiangsu University, focusing on the basic application of FRP materials in civil enginee-ring.

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	XIE Guihua
	SUN Yue
	YAN Peng
	LIU Yang
	WENG Yu

Cite this article:

XIE Guihua,SUN Yue,YAN Peng, et al. Performance of Bonded Anchorage for CFRP Tendons Affected by Temperature or Moisture[J]. Materials Reports, 2020, 34(22): 22178-22184.

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http://www.mater-rep.com/EN/10.11896/cldb.19100008 OR http://www.mater-rep.com/EN/Y2020/V34/I22/22178

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