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（1 青島理工大學(xué)管理學(xué)院， 青島 266000； 2 青島理工大學(xué)土木工程學(xué)院， 青島 266000）

［摘要］ 碳纖維布加固是近年來(lái)在混凝土結(jié)構(gòu)上應(yīng)用較廣泛的加固技術(shù)，而預(yù)應(yīng)力碳纖維布加固比普通碳纖維加固更加有效和實(shí)用，本文首先從多種角度出發(fā)，利用抗彎承載力公式計(jì)算結(jié)果，對(duì)可能影響二次受力下預(yù)應(yīng)力碳纖維布加固混凝土梁承載力的因素進(jìn)行分析，然后結(jié)合預(yù)應(yīng)力混凝土梁剛度計(jì)算公式，推導(dǎo)出正常使用階段預(yù)應(yīng)力碳纖維布加固混凝土梁剛度及撓度計(jì)算公式，并把計(jì)算值與試驗(yàn)值進(jìn)行對(duì)比驗(yàn)證，證明了其科學(xué)性，可為實(shí)際工程提供一定的理論參考。

［關(guān)鍵詞］混凝土梁； 加固； 預(yù)應(yīng)力； 碳纖維布； 承載力； 剛度

中圖分類號(hào)： TU375.1 文獻(xiàn)標(biāo)識(shí)碼： A文章編號(hào)：  1002-848X(2016)S1-0931-03

Calculation and analysis of bearing capacity influencing factors and flexural stiffness for

 pre-stressed CFRP reinforced concrete beam 

Liu Ying1， Liang Feng2， Cao Lu2， Tang Lujian2

（1 School of Management， Qingdao University of Technology， Qingdao 266000， China；

2 School of Civil Engineering， Qingdao University of Technology， Qingdao 266000， China）

Abstract: CFRP reinforcement method is a widely applied reinforcement technology in concrete structure in recent years,and pre-stressed CFRP reinforcement method is more effective and practical than ordinary CFRP reinforcement.From different perspectives, flexural bearing capacity formula was used to calculate results. And the factors that may affect the bearing capacity of concrete beamreinforced by pre-stressed CFRP under secondary load condition were analyzed. Combined with pre-stressed concrete beam stiffness calculation formula, calculation formulas for stiffness and deflection of concrete beam reinforced by pre-stressed CFRP during normal use stage were derived.The calculated results were compared with the experimental results to verify itsscientificalness, which can provide certain theoretical reference for practical engineering.

Keywords: concrete beam； reinforcement； pre-stress； CFRP； bearing capacity； stiffness

作者簡(jiǎn)介： 劉瑛，博士，教授，碩士生導(dǎo)師，Email：qd_liuying@163.com。

*山東省自然科學(xué)基金項(xiàng)目（ZR2013EEM010），二次受力下預(yù)應(yīng)力碳纖維加固鋼筋混凝土梁的研究。