Abstract
The present study is concerned with the fatigue performance of the adhesively bonded anchorage for fiber reinforced polymer (FRP) tendons under hygrothermal environment. Series of static and fatigue tests were carried out to investigate the performance aging of the conditioned anchorage. The results show that the increase of the immersion duration and immersion temperature aggravates the fatigue performance's degradation. The tendon slippage is increased and the fatigue life is shortened. The extension of the immersion makes the anchorage’s fatigue life more sensitive to the stress amplitude. The initial stiffness is degraded as well. A decrease of the stress ratio increases the tendon slippage and speeds up the stiffness degradation during cyclic loading, regardless of the moisture conditions. For the specimens suffering from the same immersion conditions, the constant life diagram with a longer fatigue life is always below the CLD with a shorter fatigue life. But the CLDs may become distinctly different for the specimens subjected to different immersion conditions. Under any immersion conditions, it is applicable for the anchorage that the fatigue life can be improved by lowering the stress amplitude or the stress level.
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