首页> 美国卫生研究院文献>Materials >Development of Bonded/Riveted Steel Anchorages of Prestressed CFRP Strips for Concrete Strengthening
【2h】

Development of Bonded/Riveted Steel Anchorages of Prestressed CFRP Strips for Concrete Strengthening

机译:预应力CFRP筋粘结/铆接钢筋锚固技术的发展

代理获取
本网站仅为用户提供外文OA文献查询和代理获取服务,本网站没有原文。下单后我们将采用程序或人工为您竭诚获取高质量的原文,但由于OA文献来源多样且变更频繁,仍可能出现获取不到、文献不完整或与标题不符等情况,如果获取不到我们将提供退款服务。请知悉。

摘要

CFRP (carbon fiber reinforced polymer) strips are currently often used to strengthen reinforced concrete structures in flexure. In order to ensure effective strengthening, proper connection between FRP material and concrete structure is needed. CFRP strips can be applied passively (only by bonding to the concrete surface) or actively (by prestressing before bonding). In the case of passive strengthening, CFRP strips connecting by bonding to the surface along the strengthened element are usually sufficient. However, active (prestressing) CFRP strips should be additionally anchored at their ends. Anchoring of unidirectional CFRP strips to the reinforced concrete is difficult because of their weak properties in transverse directions. The paper presents a development of mechanical steel anchorages used in an active CFRP flexural strengthening system for reinforced concrete structures. The anchorages were made of steel plates connected to CFRP strips with steel rivets and epoxy adhesive. They were developed within series of tests on specimens from small-scale to full-scale tested in an axial tensile scheme. The paper describes successive modifications of the anchorages as well as the results of full-scale tests. The final version of the anchorage developed during the research had a tensile failure force of 185 kN, which is sufficient value for CFRP strengthening purposes.
机译:CFRP(碳纤维增强聚合物)条目前经常用于加固弯曲的钢筋混凝土结构。为了确保有效的加强,需要在FRP材料和混凝土结构之间进行适当的连接。 CFRP条可以被动(仅通过粘结到混凝土表面)或主动(通过粘结前的预应力)施加。在被动加固的情况下,通过沿加固元件粘结到表面的CFRP条通常就足够了。但是,应将活动(预应力)CFRP条固定在其末端。将单向CFRP筋锚固到钢筋混凝土上是困难的,因为它们的横向性能较弱。本文介绍了在钢筋混凝土结构的主动CFRP抗弯加固系统中使用的机械锚固技术的发展。锚固件由钢板制成,这些钢板通过钢铆钉和环氧树脂粘合剂连接到CFRP条。它们是在一系列测试中开发的,从轴向拉伸方案的小规模到全面测试的标本中。本文介绍了锚点的连续修改以及全面测试的结果。在研究过程中开发的最终锚固形式的拉伸破坏力为185 kN,对于CFRP加固而言,这是足够的值。

著录项

相似文献

  • 外文文献
  • 中文文献
  • 专利
代理获取

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