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INFLUENCE OF BOND ON ROTATION CAPACITY OF CONCRETE PRE-TENSIONED WITH AFRP

机译:粘接剂对非洲水泥预应力混凝土自转能力的影响

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The present study considers the flexural behaviour of concrete beams pre-tensioned with ara-mid fibre reinforced plastic (AFRP) tendons. AFRP materials are linearly elastic and do not yield. Hence, failure due to the tendons rupturing is brittle and sudden. However, failure due to concrete crushing is also deemed to be undesirable. The current work demonstrates how a high rotational capacity can be achieved using a composite made up of two brittle materials.rnA series of small scale beams were cast using two types of AFRP or steel tendons. The influence of bond was investigated by testing beams with bonded tendons, unbonded tendons or partially bonded tendons. It was found that, unlike the bonded and unbonded beams, the beams with partially bonded tendons achieved both a high rotation capacity and a high ultimate load.
机译:本研究考虑了预张紧了芳纶纤维增强塑料(AFRP)筋的混凝土梁的抗弯性能。 AFRP材料具有线性弹性,不会屈服。因此,由于肌腱破裂而引起的破坏是脆弱而突然的。然而,由于混凝土压碎而导致的失效也被认为是不希望的。当前的工作展示了如何使用由两种脆性材料制成的复合材料来实现高旋转能力。rn使用两种类型的AFRP或钢筋铸造了一系列小型梁。通过测试具有粘结筋,未粘结筋或部分粘结筋的梁来研究粘结的影响。已经发现,与粘结和未粘结的梁不同,具有部分粘结的钢筋束的梁既具有高的旋转能力又具有高的极限载荷。

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