中南大学学报（自然科学版）2016，Vol.47Issue(11)：3873-3883,11.DOI:10.11817/j.issn.1672-7207.2016.11.034
自锚CFRP预应力控制及梁抗剪加固机理试验研究
Experimental research on prestress control and reinforcement mechanism of T-beams shear-strengthened with prestressed CFRP laminates
摘要
Abstract
Using an innovative anchorage system, experiments were carried out on 17 RC T-beams shear-strengthened with self-anchored prestressed CFRP laminates. The prestressing losses and the numerical relationship between the strain of CFRP and torque were studied. The shear capacity, load-displacement curves and strain distribution of FRP traps in different reinforcement schemes were studied. The influence factors, i.e., shear span ratio, prestressing level, preloading level and concrete strength on shear resistance were examined in the experimental investigation. The results show that the use of this anchorage system can avoid debonding failure, and significantly improve the cracking and ultimate load capacity so that the tensile capacity of CFRP can be fully employed. The shear capacity is positively correlated to shear span ratio and concrete strength within a certain range. In the range of recommended prestressing level, shear capacity increases with the improvement of prestressing level. The existence of the prestressed CFRP traps compensates for the negative effect brings by preloading.关键词
自锁锚固/预应力碳纤维布/抗剪加固/受剪承载力/预应力损失Key words
self-anchor/prestressed carbon fiber reinforced polymer (CFRP)/shear-strengthened/shear capacity/prestress loss分类
建筑与水利引用本文复制引用
刘澍,郑智卿,李真,周朝阳,贺学军..自锚CFRP预应力控制及梁抗剪加固机理试验研究[J].中南大学学报（自然科学版）,2016,47(11):3873-3883,11.基金项目
湖南省自然科学基金重点资助项目(13JJ2005)；国家自然科学基金资助项目(51378507)；中南大学教师研究基金资助项目(2013JSJJ019)(Project(13JJ2005) supported by the Key Project of National Natural Science Foundation of Hunan Province （13JJ2005）
Project(51378507) supported by the Natural National Science Foundation of China （51378507）
Project(2013JSJJ019) supported by the Teacher Research Foundation of Central South University) （2013JSJJ019）
