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首页> 外文期刊>Journal of Composites for Construction >Efficient Cfrp Strap Configurations For The Shear Strengthening Of Reinforced Concrete T-beams
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Efficient Cfrp Strap Configurations For The Shear Strengthening Of Reinforced Concrete T-beams

机译：高效的Cfrp带构造，用于钢筋混凝土T型梁的抗剪加固

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摘要

A prestressed carbon fiber-reinforced polymer (CFRP) strap retrofitting system has been found to significantly enhance the shear capacity of existing reinforced concrete beams. In previous studies, the CFRP straps were supported on metal pads placed on the top and bottom of a beam necessitating top surface access. The. goal of the current work was to develop a system where the straps were installed from underneath a slab without compromising the strengthening efficiency. A series of T-beam experiments was conducted where the CFRP straps were inserted through holes that were drilled from below the flange, thereby avoiding the need for access to the top surface. The depth of penetration of the CFRP straps into the compression flange, the concrete strength, the CFRP strap spacing, the presence of holes in the compression flange, and the size of the loading pads were all found to affect the shear performance. Using the most successful installation technique, the resulting CFRP strengthened beam failed at a load that was approximately 50% higher than that of an unretrofitted control beam.
机译：已发现预应力碳纤维增强聚合物（CFRP）皮带改型系统可显着提高现有钢筋混凝土梁的抗剪能力。在以前的研究中，CFRP皮带被支撑在放置在横梁顶部和底部的金属垫上，因此需要从顶部进入。的。当前工作的目标是开发一种系统，在该系统中，将板条从板下方安装，而不会影响加固效率。进行了一系列的T型梁实验，其中CFRP皮带穿过从法兰下面钻出的孔插入，从而避免了接近顶部表面的需要。发现CFRP皮带渗透到压缩法兰中的深度，混凝土强度，CFRP皮带间距，压缩法兰中是否存在孔以及加载垫的尺寸均会影响剪切性能。使用最成功的安装技术，所得的CFRP加固梁在比未改装的控制梁高约50％的载荷下失效。

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