预张拉碳纤维布加固钢筋混凝土梁抗弯承载力  

Bending Bearing Capacity of Reinforced Concrete Beams Strengthened by Pre-Tensioned Carbon Fiber Composite Sheets

作　　者：高鹏[1] 顾祥林[1] 

机构地区：[1]同济大学建筑工程系,上海200092

出　　处：《结构工程师》2008年第2期89-93,共5页Structural Engineers

基　　金：上海市科学技术委员会科研攻关项目(032112060)

摘　　要：对预张拉碳纤维布加固钢筋混凝土梁正截面受弯破坏进行了总结和分析,认为加固设计时应避免出现超筋破坏。针对适筋破坏和碳纤维布拉断两种破坏模式,考虑碳纤维布的预张拉应变和构件上初始弯矩的影响,提出了预张拉碳纤维布加固钢筋混凝土梁正截面抗弯承载力的计算方法。试验验证和比较分析结果表明,计算过程简单实用且有较好的精度。Failure modes of reinforced concrete beams strengthened by pre - tensioned carbon fiber composite sheets were totally summarized and analyzed, and it was suggested that the over - reinforced concrete beams should be avoided in strengthening design. Considering the pre - strain of carbon fiber composite sheets and the initial load applied on a beam, a practical calculation method of ultimate moment for the strengthened beam whose failure mode is crushing of concrete or rupture of carbon fiber composite sheets was proposed. Comparing with the test results and the calculation results using the methods proposed by other researchers, it was found that the method proposed by the authors in this paper is more applicable and precise.

关 键 词：预张拉 碳纤维布 加固 钢筋混凝土梁 抗弯承载力 

分 类 号：U445.72[建筑科学—桥梁与隧道工程]