碳纤维加固输电铁塔角钢有效性分析  

Effectiveness analysis of carbon fiber reinforced transmission tower angle steel

作　　者：关天宇 姜岚[1,2] 段国勇 唐波 GUAN Tianyu;JIANG Lan;DUAN Guoyong;TANG Bo(College of Electrical and New Energy,China Three Gorges University,Yichang 443002,China;Hubei Provincial Engineering Technology Research Center for Power Transmission Line,Yichang 443002,China)

机构地区：[1]三峡大学电气与新能源学院,宜昌443002 [2]湖北省输电线路工程技术研究中心,宜昌443002

出　　处：《复合材料科学与工程》2024年第6期48-59,共12页Composites Science and Engineering

基　　金：电力系统及大型发电设备安全控制与仿真国家重点实验室开放基金(SKLD21KM11);湖北省重点研发计划(2020BAB110)。

摘　　要：以输电铁塔受损角钢为研究对象,借鉴国内外碳纤维增强复合材料(CFRP)加固修复技术,提出采用碳纤维布加固铁塔角钢的方法。该方法采用胶黏剂将碳纤维布粘贴至角钢表面进行加固,加固过程中不会对角钢产生二次损伤,且流程简便,实用性强。通过建立组合结构数值分析模型,研究碳纤维布加固厚度、加固层数、铺层角度和加固方式对组合构件加固效果的影响。结果表明:使用碳纤维布加固角钢对长细比较大构件承载力的相对提高程度会增大;当采用四层铺设厚度共为0.668 mm的碳纤维布时,对角钢极限承载力的提升基本可以满足加固需求;碳纤维布各铺层角度沿角钢轴心受压方向均采用0°方向进行铺设时,可以最大化加固效果;结合经济性考虑,对角钢进行中包加固方式效果要优于全包加固效果。The damaged angle steel of transmission tower is taken as the research object.Based on the reinforcement and repair technology of carbon fiber reinforced polymer(CFRP)at home and abroad,the method of strengthening angle steel with carbon fiber cloth is proposed.In this method,carbon fiber cloth is pasted onto the surface of angle steel by adhesive for reinforcement.There is no secondary damage to angle steel during the reinforcement process,and the process is simple and practical.By establishing a numerical analysis model of composite structures,the effects of carbon fiber cloth reinforcement thickness,reinforcement layer number,ply angle and reinforcement method on the reinforcement effect of composite members are studied.The results show that the relative improvement of the bearing capacity of the angle steel reinforced with carbon fiber cloth will increase.When using four layers of 0.668 mm thick carbon fiber cloth,the improvement of the ultimate bearing capacity of the angle steel can basically meet the reinforcement demand.When the angle of each layer of carbon fiber cloth is laid in the direction of 0°along the axial compression direction of angle steel,the reinforcement effect can be maximized.Combined with economic considerations,the effect of medium-package reinforcement on angle steel is better than that of full-package reinforcement.

关 键 词：铁塔角钢 碳纤维增强复合材料 加固 极限承载力 

分 类 号：TB332[一般工业技术—材料科学与工程]