FRP约束混凝土矩形柱模型的评估  

Assessment of Models of FRP-Confined Concrete Rectangular Columns

作　　者：魏洋[1,2] 吴刚[2] 吴智深[2,3] 吕志涛[2] 郭正兴[2] 

机构地区：[1]南京林业大学土木工程学院,江苏南京210037 [2]东南大学城市工程科学国际研究中心,江苏南京210096 [3]日本茨城大学工学部

出　　处：《工程抗震与加固改造》2010年第4期58-64,共7页Earthquake Resistant Engineering and Retrofitting

基　　金：江苏省教育厅资助项目(08KJD560003);江苏省自然科学基金项目(BK2009483);国家"937"计划项目(2007CB714200)

摘　　要：FRP的侧向约束能够提高混凝土的强度和延性,对不同的截面形状,FRP约束的效果是不同的,目前,对FRP约束矩形截面混凝土所建立的应力-应变关系模型非常有限,多数模型基于自己的少量试验数据,其可靠性需要评估,本文对国内外既有的FRP约束矩形混凝土极限应力、应变模型进行了回顾,指出各自模型的特征,基于收集的大量FRP约束混凝土矩形柱的试验数据,对各模型进行了系统的评估,指出各模型的优劣之处。结果表明,不同模型的准确性具有一定的适用条件,进一步的研究应区分强、弱约束的不同条件。FRP lateral confinement can improve strength and ductility of concrete.For different cross-section shapes,FRP confining effect is different.Currently,the stress-strain relationship models established on FRP-confined rectangular concrete is very limited,and most models are calibrated against their own small amount of test data.It is necessary to assess the reliability of these models.Existing ultimate stress and strain models of FRP-confined rectangular concrete are reviewed and their distinct features are pointed out.Based on large available experimental data of FRP-confined rectangular concrete,the performance of existing models is assessed systematically.The strengths and weakness of the various models are discussed.The accuracy of various models is applicable in certain conditions.To distinguish between sufficient and insufficient confinement is necessary for further research.

关 键 词：FRP 约束 矩形柱 应力-应变 模型 

分 类 号：TU375.3[建筑科学—结构工程]