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首页> 外文期刊>Journal of testing and evaluation >Testing and Evaluation of Bond Surface Profile Influencing the CFRP Strengthening of Steel Members
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Testing and Evaluation of Bond Surface Profile Influencing the CFRP Strengthening of Steel Members

机译：影响钢构件CFRP加固的粘结表面轮廓的测试和评估

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The strengthening of steel structures using Fiber-Reinforced Polymers (FRP) is one of the most effective strengthening techniques based on recent research. Usually, FRP has good characteristics with regard to a high strength-to-weight ratio, chemical resistance, and corrosion resistance. Generally, steel-structure strengthening is accomplished by changing the inherent property of the section. Comparatively, the FRP strengthening technique has simplicity, lighter weight, higher strength, and greater durability. The strength of the FRP-strengthened steel member depends on the bond between the FRP and steel substrate. In the present experimental investigation, the bond strength between the FRP and steel substrate is studied for different surface profiles (SA 2, SA 2(1/2), and SA 3), which are prepared with two different types of blasting, namely, sand blasting and copper slag blasting. A series of pull-off and pull tests have been carried out to assess the bond strength between FRP and steel substrate. From the pull-off test results, the maximum average bond-strength values of copper slag-blasted test specimens are 39.37 (SA 2), 35.71 (SA 2(1/2)), and 31.44% (SA 3) higher than those of the test specimens prepared with sand blasting. In the pull test, the maximum average tensile strength values of the copper slag-blasted test specimens are 20.95 (SA 2), 29.51 (SA 2(1/2)), and 37.30 % (SA 3) higher than those of the sand-blasted test specimens prepared with the same profiles. Thus, the performance of test specimens prepared with the SA 3 surface profile with copper slag blasting is potentially stronger than other surface profiles.
机译：基于最近的研究，使用纤维增强聚合物（FRP）加固钢结构是最有效的加固技术之一。通常，FRP在高的重量/重量比，耐化学性和耐腐蚀性方面具有良好的特性。通常，通过改变型材的固有特性来完成钢结构的加固。相比之下，FRP加固技术具有简单性，更轻的重量，更高的强度和更大的耐用性。 FRP加固钢构件的强度取决于FRP和钢基材之间的结合力。在目前的实验研究中，研究了FRP与钢基材之间的粘结强度，以用于不同的表面轮廓（SA 2，SA 2（1/2）和SA 3），这是通过两种不同类型的喷砂制备的，即喷砂和铜渣喷砂。已经进行了一系列拉拔试验，以评估FRP与钢基材之间的粘结强度。从拉断测试结果来看，铜渣喷砂试样的最大平均结合强度值比那些高39.37（SA 2），35.71（SA 2（1/2））和31.44％（SA 3）。喷砂制备的试样中的一部分。在拉力试验中，铜渣喷砂试样的最大平均抗拉强度值比砂子高20.95（SA 2），29.51（SA 2（1/2））和37.30％（SA 3）。喷砂的试样具有相同的轮廓。因此，具有SA 3表面轮廓的铜渣喷砂制备的试样的性能可能强于其他表面轮廓。

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