碳纤维复材网格增强玻璃纤维复材套筒加固箍筋锈蚀钢筋混凝土短柱轴压性能  

Mechanical Properties of RC Stub Columns with Corroded Stirrups Strengthened by Grouted GFRP Jackets Reinforced with CFRP Grids Under Axial Compression

作　　者：梁富春 高剑平[1] 段红伟 曹忠民[1] LIANG Fuchun;GAO Jianping;DUAN Hongwei;CAO Zhongmin(School of Civil Engineering and Architecture,East China Jiaotong University,Nanchang 330013,China;Jiangxi Provincial Transportation Engineering Group Construction Co.,Ltd.,Nanchang 330000,China)

机构地区：[1]华东交通大学土木建筑学院,南昌330013 [2]江西省交通工程集团建设有限公司,南昌330000

出　　处：《工业建筑》2024年第6期100-107,共8页Industrial Construction

基　　金：国家自然科学基金项目(52268025)。

摘　　要：通过13根碳纤维增强复合材料(CFRP)网格增强玻璃纤维增强复材(GFRP)套筒加固箍筋锈蚀钢筋混凝土(RC)短柱轴压试验,研究了CFRP网格层数和箍筋锈蚀率对箍筋锈蚀钢筋混凝土短柱荷载-轴向位移曲线、极限承载力、破坏形态的影响规律。研究结果表明:加固柱破坏时整体表现为脆性破坏;GFRP套筒加固使箍筋锈蚀RC柱极限承载力最高提升59.4%,CFRP网格作为增强材料使加固柱极限承载力最大提升87%;CFRP网格层数相比箍筋锈蚀率对加固柱的荷载-轴向位移曲线产生的影响更大,且层数越多,曲线在弹塑性阶段的强化程度越明显;采用CFRP网格包裹的加固试件极限承载力随网格层数的增加而递增,极限承载力随箍筋锈蚀率的增大,增长幅度呈现下降趋势。研究结果可以为实际箍筋锈蚀桥墩加固提供试验依据。Through conducting axial compression tests on 13 RC stub columns with corroded stirrups strengthened by grouted GFRP Jackets reinforced with CFRP grids,the effects of the number of CFRP grid layers and stirrup corrosion rate on the load-axial displacement curve,ultimate bearing capacity and damage pattern of the specimens were investigated.The results indicated that:the overall performance of the reinforced columns was brittle failure;the fiberglass sleeve reinforcement increased the ultimate bearing capacity of the stirrup-corroded RC columns by 59.4%,and the CFRP grids as a reinforcing material increased the ultimate bearing capacity of the reinforced columns by 87%;the number of CFRP grid layers had a greater influence on the load-axial displacement curves of reinforced columns than the corrosion rate of stirrups,and the more the number of layers,the more obvious the strengthening degree of the curves in the elastoplastic stage;the ultimate bearing capacity increased with the increase of the number of CFRP grid layers;the ultimate bearing capacity increased with the increase of the corrosion rate of stirrups,and the increase of the ultimate bearing capacity showed a decreasing trend.The research results of the experiments could provide an experimental basis for the reinforcement of bridge abutments with corroded stirrups in practical engineering.

关 键 词：钢筋混凝土短柱 CFRP网格 GFRP套筒 箍筋锈蚀 轴压力学性能 

分 类 号：TU375.3[建筑科学—结构工程]