• 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Composite Structures >Strengthening of RC beams with externally bonded and anchored thick CFRP laminate
【24h】

Strengthening of RC beams with externally bonded and anchored thick CFRP laminate

机译：强化外部粘合和锚固厚CFRP层压板的RC梁

获取原文
获取原文并翻译 | 示例
           
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

Premature debonding of externally bonded FRP laminate from retrofitted reinforced concrete (RC) members can lead to inefficient use of FRP and can limit the level of strength increase that can be achieved. In this investigation, pi-CFRP anchors are used in an attempt to delay the onset of premature debonding and to achieve higher strength in beams retrofitted with a 1.2 mm thick and 50 mm wide CFRP laminate. This investigation consisted of testing six large scale T-beams with a 4500 mm span, 400 mm height and 500 mm flange width under four-point bending. Two beams were tested without retrofit as control beams, one beam with the laminate epoxy bonded to the beam and the remaining three beams with the laminate epoxy bonded and anchored using CFRP pi-anchors. One of the beams with 30 anchors exhibited a 46% increase in the debonding load over the beam without anchors while the laminate attained a maximum strain equal to 80% of its ultimate strain capacity, a 94% increase compared to the maximum strain reached in the companion beam strengthened with only the epoxy bonded laminate. The displacement ductility ratio of the latter beam at debonding exceeded 4. The results demonstrate the pi-anchoring system effectiveness and a feasible way for efficiently utilizing strong and thick laminates in strengthening RC members.
机译：从改造的钢筋混凝土（RC）构件的外部粘合FRP层压材料的过早剥离可导致FRP的低效使用，可以限制可以实现的强度增加水平。在该研究中，PI-CFRP锚固锚试图延迟过早剥离的发作，并在用1.2mm厚的1.2mm厚和50mm宽的CFRP层压板改装的梁中获得更高的强度。本研究包括测试六个大型T梁，400毫米跨度，400毫米高，500毫米法兰宽度，四点弯曲。测试两个梁而不作为控制梁改装，一个带有层压环氧物的一个光束与梁粘合到梁和剩余的三个梁，其中层压环氧物键合并使用CFRP PI-锚锚定。具有30个锚定的梁之一在没有锚的梁上表现出脱钢载荷的剥离负荷增加46％，而层压材料达到了相当于其最终应变能力的最大菌株，而且与达到的最大菌株相比增加了94％的增加仅使用环氧树脂粘合层压体加固伴侣梁。后一束在剥离时的位移延展性比率超过4.结果证明了PI锚固系统有效性和可行的方式，以便有效地利用强大的层压板强化RC成员。

著录项

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱：kefu@zhangqiaokeyan.com

京公网安备：11010802029741号 ICP备案号：京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有

  • 客服微信

  • 服务号