...
首页> 外文期刊>Journal of bridge engineering >Evaluation of Prestressed Concrete Girders Strengthened with Carbon Fiber Reinforced Polymer Sheets
【24h】

Evaluation of Prestressed Concrete Girders Strengthened with Carbon Fiber Reinforced Polymer Sheets

机译:碳纤维增强聚合物板加固预应力混凝土梁的评估

获取原文
获取原文并翻译 | 示例
   

获取外文期刊封面封底 >>

       

摘要

This paper details the use of carbon fiber reinforced polymer (CFRP) sheets to repair and strengthen prestressed concrete bridge girders in flexure and shear. Three specimens that were removed from an overloaded bridge (Bridge No. 56) in Graham County, Kansas were tested. Two of the specimens were repaired and strengthened, and all three were tested to failure to determine flexural capacity. Test results showed that two layers of longitudinal CFRP sheets increased the flexural capacity of the strengthened specimens by 20% compared to an unstrengthened control specimen. Shear capacity was also evaluated on both ends of each specimen. Two different cases were evaluated in shear. One case allowed shear cracks to propagate inside the transfer length of the prestressing strand, allowing a bond failure to occur. The second case forced the shear cracks to remain outside of the transfer length, thereby preventing a bond failure. The test results show that transverse CFRP sheets increased the shear capacity of the specimens tested by as much as 28%, but did not prevent bond failures.
机译:本文详细介绍了碳纤维增强聚合物(CFRP)板在弯曲和剪切作用下修复和加固预应力混凝土桥梁的应用。测试了从堪萨斯州格雷厄姆县的一座过载桥梁(56号桥)上取下的三个标本。对两个标本进行了修复和加固,并对所有三个标本进行了测试,以确定弯曲强度。测试结果表明,两层纵向CFRP片材与未增强的对照样品相比,将增强的样品的抗弯能力提高了20%。还评估了每个样品两端的剪切能力。在剪切中评估了两种不同的情况。一种情况是剪切裂纹在预应力束的传输长度内传播,从而导致粘结失败。第二种情况迫使剪切裂纹保持在传输长度之外,从而防止粘结失败。测试结果表明,横向CFRP板将测试样品的剪切能力提高了28%,但并没有防止粘结失败。

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