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纤维加固受弯构件全过程分析和承载力计算
引用本文:曹双寅,邱洪兴,腾锦光.纤维加固受弯构件全过程分析和承载力计算[J].工业建筑,2000,30(10):27-30,43.
作者姓名:曹双寅  邱洪兴  腾锦光
作者单位:[1]东南大学 [2]香港理工大学
基金项目:香港理工大学AreaofStrategicDevelop ment(ASD)计划的资助
摘    要:通过数值计算和试验 ,对外贴玻璃纤维加强复合材料加固受弯构件的受力全过程进行了研究 ,探讨了加固后钢筋混凝土受弯构件正截面的破坏特征、受力特点以及影响因素 ,并在此基础上建立了加固后正截面抗弯承载能力计算公式。分析结果表明 ,加固构件的受力全过程包括整体工作、带裂缝工作、纤维增强和粘结损伤等 4个阶段 ,在前 3个阶段中采用平截面假设计算得到的计算结果与试验结果吻合较好 ,但进入第 4阶段后 ,由于局部粘结破坏 ,构件的实际变形能力明显大于计算值

关 键 词:纤维复合材料  受弯构件  加固  受力全过程  承载力

LOAD-DEFORMATION PROCESS AND STRENGTH OF FLEXURAL MEMBERS STRENGTHENED WITH GFRP COMPOSITE
Cao Shuangyin Qiu Hongxing\,Teng Jinguang\ Lin Li.LOAD-DEFORMATION PROCESS AND STRENGTH OF FLEXURAL MEMBERS STRENGTHENED WITH GFRP COMPOSITE[J].Industrial Construction,2000,30(10):27-30,43.
Authors:Cao Shuangyin Qiu Hongxing\  Teng Jinguang\ Lin Li
Affiliation:Cao Shuangyin Qiu Hongxing\ Teng Jinguang\ Lin Li(Southeast University\ Nanjing \ 210096)\ (Hong Kong Polytechnic University)
Abstract:This paper presents both numerical and experimental studies of the behaviour of flexural members strengthened with glass fibre\|reinforced plastic (GFRP) composite.The load\|deformation process,flexural failure characteristics and the effect of various parameters on their behaviour are all discussed.Furthermore,a method for the determination of the ultimate strength of such members is described.The test results show that the load\|deformation process of these strengthened slabs consists of four stages:elastic stage befroe cracking,cracking stage from first cracking to the yielding of steel bars, strength\|gaining stage from the yielding of steel bars to the initiation of debonding and the debonding propagation stage from the initiation of debonding to failure.In the first three stages,the results from a theoretical load\|deflection analysis employing the plane section assumption agree closely with those of the test.However,in the forth stage,the analytical results differ from those of the test due to the appearance and propagation of debonding.
Keywords:fiber composite\ flexural members \ strengthening\ load\|deformation process\ load bearing capacity
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