【作者】 刘建平； 周朝阳； 罗云龙； 许芃；

【Author】 Liu Jianping~(1,2)Zhou Chaoyang~1 Luo Yunlong~(1,3) Xu Peng~1 (1.Central South University,Changsha 410075;2.Changsha University;3.Zhongye Changtian International Engineering Co.,Ltd.)

【机构】 中南大学； 长沙学院； 中冶长天国际工程有限责任公司；

【摘要】 采用U形碳纤维条带对混凝土T梁进行抗剪加固,提出了一种阴角绕杆端锚方案,即将平行双杆通过活节螺栓植入腹板与翼缘相交的阴角处,而纤维带两端绕双杆自锁。本文简要介绍了相关试验研究情况。试验结果表明,与常规粘贴相比,U形碳纤维带在剥离后借助可靠的端部锚固,仍可发挥其加固效果,有效提高了梁的抗剪承载力,为不允许封闭粘贴或穿翼锚固纤维带的T梁抗剪加固工程提供了高效可行的选择。更多还原

【Abstract】 A novel program is proposed to strengthen concrete T-beams in shear with CFRP strips. In this program,the U-shaped strips are wound at both ends around double bars in parallel,one of which is planted into the concave angle with the help of bolts and adhesive.The experiments were carried out and the results are presented in this paper.It showed that due to the reliable end anchorage the U-shaped CFRP strips effectively improved the shear behavior of beams,especially after peeling-off of the strips,as compared with the conventional scheme of pure bonding.It provides an efficient and feasible solution for shear strengthening when whole wrapping and/or penetration of the flange are not allowed.更多还原