Strengthening of Masonry with FRP Bars
Strengthening of Masonry with FRP Bars
复制标题
用 FRP 筋加固砖石结构
DOI：
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发表时间：
2002
期刊：
影响因子：
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通讯作者：
A. Nanni
中科院分区：
文献类型：
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作者：
J. G. Tumialan;N. Galati;Sinaph M. Namboorimadathil;A. Nanni
对于民用基础设施的改造，纤维增强聚合物（FRP）外部粘结层压板的替代方案是使用近表面安装（NSM）FRP筋。这种技术包括将一根钢筋放入被加固构件表面的凹槽中。FRP筋可以嵌入环氧树脂或环氧树脂基膏中，其在基材和筋之间传递应力。NSM FRP筋在混凝土构件加固中的成功应用已扩展到无筋砌体（URM）墙，这是地震事件中最容易失效的建筑构件之一。本文介绍了FRP筋加固URM的三种应用，并报告了所获得的实验结果。在第一种应用中，FRP筋垂直施加，以抵抗作用在砌体墙上的平面外力（即弯曲加固）。在第二种应用中，在砌体接缝中水平插入钢筋，以在受到面内力时加强墙壁（即剪切加固）。最后，第三个应用程序处理砌体墙的改造显示不足锚固到基础梁。在这种应用中，FRP筋被放置在墙的趾部区域作为锚，以增加抗弯承载力。在这三种应用中，强化都非常有效。
For the retrofitting of the civil infrastructure, an alternative to Fiber Reinforced Polymer (FRP) externally-bonded laminates is the use near surface mounted (NSM) FRP bars. This technique consists of placing a bar in a groove cut into the surface of the member being strengthened. The FRP bar may be embedded in an epoxy- or cementitious-based paste, which transfers stresses between the substrate and the bar. The successful use of NSM FRP bars in the strengthening of concrete members has been extended to unreinforced masonry (URM) walls, one of the building components most prone to failure during a seismic event. This paper describes three applications of FRP bars for the strengthening of URM and reports on the obtained experimental results. In the first application, FRP bars are applied vertically to resist out-of-plane forces acting on the masonry walls (i.e. flexural strengthening). In the second application, bars are inserted horizontally in the masonry joints to strengthen the wall when subjected to in-plane forces (i.e. shear strengthening). Finally, the third application deals with the retrofitting of masonry walls showing deficient anchorage to the base beam. In this application, FRP bars are placed in the toe region of the wall acting as anchors to increase flexural capacity. In each of these three applications, the strengthening was remarkably effective.