摘要
碳纤维增强复合材料(CFRP)板加固钢梁时,采取防止CFRP板由于端部应力集中而发生剥离破坏的措施十分必要,通过采用不同长度、宽度、厚度的CFRP板对H钢梁进行受弯加固试验,并在CFRP板端部设置了碳纤维布U形锚固措施,试验结果表明:采用CFRP板加固钢梁能明显提高钢梁的抗弯承载能力和刚度,提高的幅值与加固面积、CFRP板厚度及端部锚固有关,加固面积越大、CFRP板越厚其加固效果越好;在加固延伸长度范围内设置的碳纤维布U形锚固,能在一定程度上防止剥离破坏的作用并可增加加固效果.
It is necessary to take measures to prevent the carbon fiber-reinforced polymer（CFRP） plate debonding from the CFRP-strengthened steel beam due to the stress concentration at the two ends of the plate.In this paper,different lengths,widths and thickness of CFRP plates are used in the strengthening experiment to strengthen the bending steel beams,and set U-shaped carbon fiber reinforced polymer sheet anchor at the two ends of the plate.Test results show significant increases in the bending capacity and stiffness of steel beams strengthened with CFRP plates.The increases are related with the area of strengthening,the thickness of CFRP plate and the anchor at the end.The larger of the strengthening area,the thicker of the CFRP plate,and the greater of the strengthening effect.The U-shaped carbon fiber reinforced polymer sheet anchor at the end of CFRP plate may prevent debonding to some extent and increase the effectiveness of the strengthening.
出处
《广西工学院学报》
CAS
2010年第4期9-12,共4页
Journal of Guangxi University of Technology
基金
广西科学研究与技术开发项目(桂科攻0992001-13)
广西自然科学基金资助(2010GXNSFB013006)资助
关键词
CFRP板
加固
受弯钢梁
CFRP plate
strengthening
bending steel beam
