摘要
为验证碳纤维(CFRP)布对损伤转接环性能的提升效果,以钢-混凝土塔筒转接段为原型,开展了1∶3的缩尺模型试验。设置转接段底部脱空以模拟实际工程中转接段所出现的注浆不密实的现象,采用外包CFRP布对损伤转接段进行加固,对比数字图像法(DIC)所采集的试验数据,验证加固后转接段的静力和疲劳性能。试验结果表明:转接段使用CFRP布加固后,关键点的应变平均减少了32.5%,在CFRP布+脱空修复后关键点的应变平均减少了53.5%,CFRP布加固后裂缝得到了有效抑制。在CFRP加固+脱空修复的工况下,15万次疲劳加载后测点最大压应力变化值为0.76MPa(比0次增大8.5%),CFRP布+脱空修复后转接段的抗疲劳性能较好。
The performance enhancement of CFRP(Carbon Fiber Reinforced Polymer)fabric on damaged transition rings is validated by conducting a 13 scale model experiment based on the steel∶-concrete tower transition section.A void is created at the bottom of the transition section to simulate non-dense grouting scenarios common in real projects.Externally bonded CFRP fabric is used for reinforcement.The static and fatigue performance of the reinforced transition section is evaluated using experimental data collected by Digital Image Correlation(DIC)method.The results show that the average strain at critical points in the transition section is reduced by 32.5%after CFRP reinforcement and by 53.5%with both CFRP and void repair.Cracking is effectively suppressed with CFRP reinforcement.Under the condition of CFRP reinforcement and void repair,the maximum change in compressive stress at the measuring point after 150000 cycles of fatigue loading is 0.76 MPa(an increase of 8.5%compared to 0 cycles),indicating improved fatigue resistance.
作者
赵琅
李彦娥
李强
周扬
庞昆
ZHAO Lang;LI Yan'e;LI Qiang;ZHOU Yang;PANG Kun(China Anneng Group Science And Industry Co.,Ltd.,Beijing 102600,China;CSSC Haizhuang Windpower Co.,Ltd.,Chongqing 401123,China;School of Civil Engineering,Chongqing Jiaotong University,Chongqing 400074,China)
出处
《船舶工程》
CSCD
北大核心
2024年第S02期95-104,共10页
Ship Engineering
关键词
风力发电塔塔筒
疲劳性能
数字图像法
转接段
碳纤维布(CFRP)
wind turbine tower barrel
fatigue performance
digital image correlation
transition section
carbon fiber reinforced polymer(CFRP)
