Precracked Reinforced Concrete T-Beams Repaired in Shear with Bonded Carbon Fiber-Reinforced Polymer Sheets
Precracked Reinforced Concrete T-Beams Repaired in Shear with Bonded Carbon Fiber-Reinforced Polymer Sheets
复制标题
用粘合碳纤维增强聚合物板剪切修复预裂钢筋混凝土 T 梁
DOI：
10.14359/51683632
复制
发表时间：
2012
影响因子：
1.8
通讯作者：
C. Morley
中科院分区：
文献类型：
--
作者：
S. Dirar;J. Lees;C. Morley
本研究探讨外贴碳纤维布加固预裂钢筋混凝土T型梁之抗剪性能。它报告了七个测试未加强和加强钢筋混凝土T型梁，确定的影响荷载历史，梁的深度，和纵向钢筋的比例对结构性能。实验结果表明，外部CFRP板对抗剪承载力的贡献可能很大，并且取决于大多数研究变量。本研究还调查了ACI 440.2R-08，英国混凝土协会TR 55，和纤维布公告14抗剪加固设计指南中纤维增强聚合物（FRP）的贡献预测的准确性。预测值与试验结果的比较表明，指南可以高估的剪切贡献的外粘结FRP系统。
This study investigates the structural behavior of precracked reinforced concrete (RC) T-beams strengthened in shear with externally bonded carbon fiber-reinforced polymer (CFRP) sheets. It reports on seven tests on unstrengthened and strengthened RC T-beams, identifying the influence of load history, beam depth, and percentage of longitudinal steel reinforcement on the structural behavior. The experimental results indicate that the contributions of the external CFRP sheets to the shear force capacity can be significant and depend on most of the investigated variables. This study also investigates the accuracy of the prediction of the fiber-reinforced polymer (FRP) contribution in ACI 440.2R-08, UK Concrete Society TR55, and fib Bulletin 14 design guidelines for shear strengthening. A comparison of predicted values with experimental results indicates that the guidelines can overestimate the shear contribution of the externally bonded FRP system.