• 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>ACI Structural Journal >Experimental Evaluation of Factors Affecting Monotonic and Fatigue Behavior of Fiber-Reinforced Polymer-to- Concrete Bond in Reinforced Concrete Beams
【24h】

Experimental Evaluation of Factors Affecting Monotonic and Fatigue Behavior of Fiber-Reinforced Polymer-to- Concrete Bond in Reinforced Concrete Beams

机译：钢筋混凝土梁中纤维增强聚合物-混凝土粘结的单调和疲劳行为影响因素的实验评估

获取原文
           
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

An experimental study of a number of factors believed to affect the performance of carbon fiber-reinforced polymer (CFRP)-to-concrete bond is presented. Bending tests on 18 moderate scale beams, measuring 254 × 152 × 4875 mm (10 × 6 × 192 in.), are presented. Two samples were tested as unreinforced control specimens and 16 were fiber-reinforced polymer (FRP) reinforced to exhibit flexure -induced intermediate crack (FIC) debonding. Of these, eight were tested monotonically to failure, whereas the other eight were subject to fatigue loads sufficient to result in fatigue failure of unretrofitted beams in approximately 500,000 cycles. In each series, two different epoxy adhesive systems were used whose moduli varied by a factor of approximately 2. Four CFRP strip geometries were tested to assess the effect of the ratio of FRP width-to-concrete soffit width (the so-called b_f/b ratio). Finally, in one comparison, the behavior of a single 50 mm (2 in.) wide strip is contrasted to that of two 25 mm (0.078 to 1 in.) wide strips spaced at 75 mm (3 in.). The effects of each of these parameters—b_f/b, multiple strip arrangements, and adhesive modulus—on the monotonic and fatigue performance of the retrofitted concrete beams are presented and discussed.
机译：进行了许多因素的实验研究，这些因素被认为会影响碳纤维增强聚合物（CFRP）与混凝土之间的粘结性能。提出了对18个中等尺寸光束的弯曲测试，尺寸为254×152×4875毫米（10×6×192英寸）。测试了两个样品作为未增强的对照样品，对16个样品进行了纤维增强的聚合物（FRP）增强，以显示出弯曲引起的中间裂纹（FIC）脱胶。其中，有8个被单调测试到失效，而其他8个则经受了足以导致未改装梁在约500,000次循环中疲劳破坏的疲劳载荷。在每个系列中，使用两种不同的环氧胶粘剂系统，其模量变化约2倍。测试了四种CFRP条形几何形状，以评估FRP宽度与混凝土拱腹宽度之比的影响（所谓的b_f / b比率）。最后，在一个比较中，单个50毫米（2英寸）宽的带的行为与两个间隔为75毫米（3英寸）的25毫米（0.078至1英寸）的带的行为形成对比。介绍并讨论了这些参数中的每个参数（b_f / b，多条带布置和粘合模量）对改型混凝土梁的单调和疲劳性能的影响。

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