碳纤维布加固受损钢梁考虑粘接层失效的有限元分析  

Finite Element Analysis of Damaged Steel Beams Reinforced with Carbon Fibre Reinforced Plastics Considering Bonding Layer Failure

作　　者：赵莹 黄子恒 刘卉[2] ZHAO Ying;HUANG Ziheng;LIU Hui(Green Prefabricated Building Industry College,Jilin University of Architecture and Technology,Changchun 130114,China;School of Civil Engineering,Changchun Institute of Technology,Changchun 130012,China)

机构地区：[1]吉林建筑科技学院绿色装配式建筑产业学院,长春130114 [2]长春工程学院土木工程学院,长春130012

出　　处：《长春工程学院学报（自然科学版）》2024年第4期22-26,共5页Journal of Changchun Institute of Technology：Natural Sciences Edition

基　　金：吉林省教育厅项目(JJKH20211366KJ)吉林省住建厅项目(2022-KL-06)。

摘　　要：利用ABAQUS有限元软件建立简支梁模型,对粘贴CFRP布加固受损钢构件进行研究。设计7个试件,通过单元选取、网格划分及材料属性分析,模拟粘结层和CFRP布的行为,并分析梁、粘接层和CFRP布在屈服和极限荷载下的应力状态、荷载-变形关系曲线及试件承载力。结果表明,粘贴CFRP布在弹性阶段对钢梁作用有限,但在塑性阶段能增加刚度、并提高抗弯极限承载力;下翼缘切口可影响钢梁应力状态和承载能力,粘贴CFRP布可改善其受力状态;CFRP布粘贴面积在50%~75%时效果最佳;CFRP布粘贴钢梁在极限荷载前粘接层未失效,荷载增加后跨中位置粘结层会出现失效现象。A simply supported beam model is established by using ABAQUS finite element software,and a study of the reinforcement of damaged steel components with CFRP is conducted.Seven specimens are designed,and the behavior of the bonding layer and CFRP is simulated through element selection,mesh division and material property analysis.The stress states,load deformation relationship curve,and specimen bearing capacity of beams,boding layers,and CFRP under yield and ultimate loads are analyzed.The results show that pasting CFRP has limited effect on steel beams in the elastic stage,but can increase stiffness and improve the ultimate bending capacity in the plastic stage.The incsion on the lower flange can affect the stress stage and bearing capacity of the steel beam,and pasting CFRP can improve the stress state.The best effect is achieved when the bonding area of CFRP is between 50%and 75%.The bonding layer of CFRP pasted steel beams does not fail before the ultimate load,but the bonding layer at the mid span position will fail after the load increases.

关 键 词：CFRP布 受损钢梁 粘接层失效 承载力 

分 类 号：TU391[建筑科学—结构工程]