预应力碳纤维板加固钢结构预应力损失研究  

STUDY OF PRESTRESS LOSS OF STEEL STRUCTURE STRENGHTHENED WITH PRESTRESS CFRP PLATES

作　　者：邓朗妮[1] 赵思敏[1] 廖羚[1] 余兆航 姬帅[1] 

机构地区：[1]广西工学院土木建筑工程系,广西柳州545006

出　　处：《工业建筑》2014年第2期147-150,82,共5页Industrial Construction

基　　金：国家自然科学基金项目(51108099)

摘　　要：预应力碳纤维板加固钢结构是具有明显加固效果和广阔应用前景的加固技术,碳纤维板在张拉及使用阶段的预应力损失研究是预应力加固技术的一个重要课题。在分析总结现有预应力碳纤维张拉设备及施工工艺的基础上,借鉴预应力混凝土结构预应力损失的分析方法进行分项计算,并提出各项预应力损失的计算方法。利用自主研发的一套碳纤维板张拉及锚固装置对3根钢梁进行加固试验,试验结果表明,提出的计算方法可行。建议预应力碳纤维板加固钢结构的预应力损失估算值取为张拉控制值的15%。The technology of steel structure strengthened with prestressed CFRP plates is an effective technique with a bright future. Prestress loss in the stage of tension and usage is an important problem in this technique. Based on the analysis and summary for the existing tension device and construction technology, using current analysis method of concrete structure strengthened with prestressed CFRP plates, separately calculate the prestress loss of CFRP plates used to strengthen steel structure and present the calculation method of every prestress loss. A set of independently developed tension and anchoring device was used to test 3 steel beams strengthened with prestressed CFRP plates. The experimental results show that： The proposed method is feasible, and the estimated value for prestress loss of steel structure strengthened with prestressed CFRP plates is suggested to be 15% tension control stress based on test.

关 键 词：加固 碳纤维板 钢结构 预应力损失 

分 类 号：TU394[建筑科学—结构工程]