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首页> 外文会议>6th International conference on advanced composite materials in bridges and structures 2012 >GFRP PRESTRESSED CONCRETE BEAMS - A PILOT STUDY
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GFRP PRESTRESSED CONCRETE BEAMS - A PILOT STUDY

机译：GFRP预应力混凝土梁-试验研究

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摘要

The use of FRP reinforcement for concrete members has increased in the last ten years due to their corrosion resistance nature, their high tensile strength and their high stiffness to weight ratio. Most of the published studies have focused on the behaviour concrete members reinforced with Glass FRP (GFRP) bars and very little attention has been given to concrete members prestressed with GFRP bars due to their high relaxation and susceptibility to creep rupture. In this study, the results of an experimental program that investigates the flexural behaviour of concrete beams prestressed with new generation of high strength GFRP bars are presented. Data on the early relaxation indicated that the GFRP bars had little or no relaxation with time. In terms of their flexural behaviour, GFRP prestressed beams showed higher cracking and ultimate loads and less deflection when compared to GFRP reinforced beams. An analytical model using the layered approach was successfully used to predict the flexural behaviour of GFRP prestressed concrete beams.
机译：在过去的十年中，由于其抗腐蚀性能，高抗拉强度和高刚度重量比，FRP增强混凝土构件的用途有所增加。大多数已发表的研究都集中在用玻璃纤维增​​强塑料（GFRP）钢筋加固的混凝土构件的性能上，而由于玻璃纤维增​​强塑料棒的高松弛性和蠕变破裂的敏感性，因此很少关注用玻璃纤维增​​强塑料棒预应力的混凝土构件。在这项研究中，提出了一个实验程序的结果，该程序研究了用新一代高强度GFRP筋预应力的混凝土梁的抗弯性能。关于早期松弛的数据表明，随着时间的流逝，GFRP棒几乎没有或没有松弛。就其抗弯性能而言，与GFRP加固梁相比，GFRP预应力梁显示出更高的开裂和极限载荷，并且挠度更低。使用分层方法的分析模型已成功用于预测GFRP预应力混凝土梁的抗弯性能。

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