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Behavior Characteristics of Bonded Type Anchorage for CFRP Tendon

机译:CFRP筋粘结型锚固的行为特征。

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This paper examines the shear stress and displacement occurring in CFRP tendons through finite element analysis on the parameters influencing the anchoring performance to evaluate the behavioral characteristics of the bonded type anchorage for CFRP tendon. The selected parameters are the inner angle of the anchorage barrel, the friction between the barrel and filling material, and the elastic modulus of the filling material. The difference in the behavioral characteristics is examined for each parameter. In view of the analytic results, the shear stress developed in the CFRP tendon reduces with larger inner angle of the barrel and lower elastic modulus of the filling material. However, such combination provokes also the increase of the relative displacement of the CFRP tendon. Especially, slip failure may occur due to the lack of the confining force necessary for the anchorage due to the sudden loss of vertical force brought by the wedge force. The experimental results relative to barrel inner angles of 2° and 4° showed that the specimen with an angle of 2° preserved its anchoring performance up to tensile failure whereas the specimen with an angle of 4°?failed in developing its maximum anchoring performance due to slip failure.
机译:本文通过对影响锚固性能的参数进行有限元分析,研究了CFRP筋中的剪切应力和位移,以评估CFRP筋粘结型锚固的行为特性。选择的参数是固定筒的内角,筒与填充材料之间的摩擦力以及填充材料的弹性模量。针对每个参数检查行为特征的差异。从分析结果来看,CFRP筋中产生的剪切应力随着枪管的内角变大和填充材料的弹性模量降低而减小。然而,这种组合也引起了CFRP腱的相对位移的增加。特别地,由于由楔形力带来的垂直力的突然损失而导致锚固所必需的限制力的缺乏,可能会发生滑动失败。相对于桶内角为2°和4°的实验结果表明,角度为2°的试样在拉伸破坏之前均能保持锚固性能,而角度为4°的试样则由于发挥最大锚固性能而失败。滑倒失败。

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