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首页> 外文会议>International Conference on High Performance Materials in Bridges; 20010729-20010803; Kona,HI; US >Rapidly Installed Fiber-Reinforced Polymer (FRP) Plates for Upgrade of Reinforced Concrete Bridges for the Military
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Rapidly Installed Fiber-Reinforced Polymer (FRP) Plates for Upgrade of Reinforced Concrete Bridges for the Military

机译：快速安装的纤维增强聚合物（FRP）板，用于升级军用钢筋混凝土桥梁

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摘要

The U.S. military must often deploy to other countries where bridges may have insufficient strength for their heavy tactical vehicles. Strong and lightweight Fiber Reinforced Polymer (FRP) materials have been shown to be useful for strengthening reinforced concrete bridges. However, to be useful by the military, an upgrade method must be fast and easy to use, two characteristics that are not usually associated with FRP materials. An effort is currently underway at the U.S. Army Engineer Research and Development Center (ERDC) to develop alternative rapid application methodologies for FRP materials to strengthen reinforced concrete bridges. The most promising technique to emerge has been the use of mechanical fasteners (i.e. nails) to attach FRP plates to the bottom of the beams, in place of the conventional adhesive bonding techniques. This paper provides an overview of an extensive series of flexural tests conducted on beams retrofitted with FRP plates using the mechanical fastening technique. The tests showed that strength gains close to that expected from conventionally-bonded FRP can be obtained and the failure mode is actually much more ductile than with conventional FRP upgrades. Results of several analytical parametric studies are also presented and provide insight into the effect of variations in material and geometric properties of the upgraded beams.
机译：美军必须经常部署到桥梁强度不足以应付重型战术车辆的其他国家。坚固轻巧的纤维增强聚合物（FRP）材料已被证明可用于增强钢筋混凝土桥梁。但是，要想被军方使用，升级方法必须快速且易于使用，这是玻璃钢材料通常不具备的两个特征。美国陆军工程师研究与发展中心（ERDC）目前正在努力开发FRP材料的替代快速应用方法，以加强钢筋混凝土桥梁。出现的最有希望的技术是使用机械紧固件（即钉子）将FRP板连接到梁的底部，以代替传统的粘合剂粘结技术。本文概述了使用机械紧固技术在用FRP板改装的梁上进行的一系列弯曲测试。测试表明，可以获得与传统粘合FRP接近的强度增强，并且失效模式实际上比常规FRP升级更具延展性。还介绍了一些分析参数研究的结果，并提供了对升级梁的材料和几何特性变化的影响的见解。

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