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Performance of CFRP tendon-anchor assembly under fatigue loading

机译：疲劳荷载下碳纤维布筋腱锚组件的性能

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摘要

This paper presents the results of an experimental study to examine the fatigue performance of a novel wedge-type anchor for carbon fiber reinforced polymer (CFRP) post-tensioning tendons. The CFRP tendon-anchor systems were tested under diiferent cyclic loading conditions. Two minimum stress levels, representing 40% and 47% of the ultimate strength of the CFRP tendon, were considered. Four stress ranges varying between 7% and 17% of the ultimate strength of the tendon were applied. The anchor system successfully met the Post-Tensioning Institute provisions for cyclic loading. The fatigue life of the system was primarily affected by the applied stress range with little effect by the minimum stress. The fatigue limit of the CFRP tendon-anchor system could be taken at a stress range of 10% for a maximum stress of 50% of its ultimate capacity. Below this stress level, the assembly is expected to withstand an infinite fatigue life.
机译：本文介绍了一项实验研究的结果，以检查新型楔形锚固件的碳纤维增强聚合物（CFRP）后张预应力筋的疲劳性能。在不同的循环荷载条件下测试了CFRP筋锚系统。考虑了两个最小应力水平，分别代表CFRP肌腱极限强度的40％和47％。施加了四个应力范围，范围为腱的极限强度的7％至17％。锚固系统成功满足了后张紧研究所关于周期性荷载的规定。系统的疲劳寿命主要受施加应力范围的影响，而最小应力的影响很小。 CFRP肌腱锚固系统的疲劳极限可以在10％的应力范围内进行，最大应力为其极限承载力的50％。在此应力水平以下，组件有望承受无限的疲劳寿命。

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