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.
谢桂华, 孙悦, 严鹏, 刘炀, 翁煜. 湿/热条件下的CFRP筋粘结型锚具性能研究[J]. 材料导报, 2020, 34(22): 22178-22184.
XIE Guihua, SUN Yue, YAN Peng, LIU Yang, WENG Yu. Performance of Bonded Anchorage for CFRP Tendons Affected by Temperature or Moisture. Materials Reports, 2020, 34(22): 22178-22184.
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2020, Vol. 34 
