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首页> 外文期刊>Journal of Composites for Construction >Development of Mechanical Anchor for CFRP Tendons Using Integrated Sleeve
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Development of Mechanical Anchor for CFRP Tendons Using Integrated Sleeve

机译：使用集成套筒开发用于CFRP筋的机械锚

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摘要

A durable and very efficient external strengthening system is achieved if steel tendons for posttensioning applications can be replaced with carbon fiber-reinforced polymer (CFRP) tendons, and if reliable anchorage systems are developed. This paper presents a newly developed and simple-to-use, two-piece wedge anchorage for CFRP tendons with an integrated sleeve and a differential angle between barrel and wedge sections. Three longitudinal slits are cut into the one-piece wedge, with one slit open and the other two stopping 1 mm from the inner wedge hole. The integrated sleeve holds the wedge's sections together during presetting and loading, resulting in a circumferential confined gripping of the CFRP tendon and optimized surface friction area. Therefore, the one-piece wedge differs from conventional wedge systems, where the wedges act separately with adjacent spaces, wedging the separate tendon sleeve in the longitudinal direction. Evaluation of the failure modes during testing was one of the main keys in achieving an increasingly better performance of the anchorage until the final anchorage was developed. The obtained failure modes are therefore described to enlighten the importance of addressing them when testing. The test setup used and measured behavior are described further together with the loading procedure. The anchorage reached the full capacity of the CFRP tendon and was seen to ensure a stable load of fracture.
机译：如果可以使用碳纤维增强聚合物（CFRP）筋代替用于后张拉伸的钢筋，并且开发出可靠的锚固系统，则可以实现一种持久且非常有效的外部加固系统。本文介绍了一种新开发的，易于使用的两件式CFRP肌腱楔形锚固装置，其具有一体式套筒，并且在桶形和楔形区段之间具有不同的角度。在一块楔子上切出三个纵向缝，其中一个缝打开，而另外两个从内楔孔中止1毫米。集成的套筒在预设和加载过程中将楔子的各个部分保持在一起，从而实现了CFRP筋的周向约束抓紧和最佳的表面摩擦面积。因此，一件式楔块不同于传统的楔块系统，在传统的楔块系统中，楔块与相邻的空间分开作用，在纵向方向上楔入单独的腱套。在开发最终锚固之前，评估测试过程中的破坏模式是实现锚固性能不断提高的主要关键之一。因此，对获得的故障模式进行描述，以启发测试时解决它们的重要性。进一步说明了所使用的测试设置和测量的行为以及加载过程。锚固达到了CFRP肌腱的全部能力，可以确保稳定的骨折负荷。

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