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Seismic Retrofit of R/C T-Beams with Steel Fiber Polymers under Cyclic Loading Conditions

机译：循环载荷条件下用钢纤维聚合物对R / C T型梁进行抗震改造

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This paper presents results of an experimental study on seismic response of reinforced concrete (RC) T-beams with shear deficiencies strengthened with externally bonded steel fiber reinforced polymer (SFRP) strips. Seven cantilever RC beams were strengthened with externally bonded uniaxial SFRP strips in a U-shape configuration and were tested under cyclic loading conditions. The two main variables examined were the strip spacing and the use of anchoring system. Among the investigated anchoring systems, one was patented, and it is studied in the present manuscript. The examination of the results leads to the conclusion that the anchoring system has a significantly more pronounced effect on the performance of the beams and the mode of failure than the type or spacing of the strips. Furthermore, SFRP strips seem to have a great potential to be used for shear strengthening, especially since the use of mechanical anchoring systems drastically improves their performance. On the contrary, the lack of mechanical anchoring results in premature delamination of the strengthening system, and thus an undesirable SFRP material performance.
机译：本文介绍了用外部粘结的钢纤维增强聚合物（SFRP）条增强的具有剪切缺陷的钢筋混凝土（RC）T梁的地震响应的实验研究结果。七个悬臂RC梁用U形配置的外部粘结单轴SFRP条加强，并在循环载荷条件下进行了测试。检查的两个主要变量是钢带间距和锚固系统的使用。在研究的锚固系统中，其中一项已获得专利，并在本手稿中进行了研究。对结果的检查得出这样的结论：与条的类型或间距相比，锚固系统对梁的性能和破坏模式的影响要明显得多。此外，SFRP条带似乎具有很大的潜力可用于剪切加固，特别是因为机械锚固系统的使用极大地改善了其性能。相反，缺少机械锚固会导致加强系统过早分层，从而导致不良的SFRP材料性能。

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