FRP约束钢管混凝土柱应力-应变关系研究  

Study on stress-strain relationship of concrete filled steel tubes confined with FRP

作　　者：武萍[1] 于峰[1] 

机构地区：[1]安徽工业大学建筑工程学院,马鞍山243002

出　　处：《建筑结构》2013年第8期89-91,共3页Building Structure

基　　金：国家自然科学基金(51008001);安徽省自然科学基金(1208085QE88);住房和城乡建设部科学技术项目(2012-K2-7)

摘　　要：确定FRP约束钢管混凝土柱的应力-应变关系是研究其力学性能的关键。根据弹性理论,引入等效约束效应系数,分别提出FRP约束钢管混凝柱的承载力和峰值应变的计算公式。在此基础上,建立了FRP约束钢管混凝土柱的应力-应变关系模型,该模型可分为三个阶段:弹性阶段、强化段和下降段。该模型较好地反映了FRP约束钢管混凝土柱应力-应变关系的特点,考虑了各因素对FRP约束钢管混凝土柱力学性能的影响。模型的计算值与试验结果吻合较好。The determination of stress-strain relationship of concrete filled steel tubes confined with FRP is the key to study the mechanical behavior of confined concrete. According to the elastic theory, the equivalent confinement effect coefficient was introduced, the calculating formulae of the hearing capacity and the peak strain of concrete filled steel tubes confined with FRP were proposed. Then the stress-strain relationship model of concrete filled steel tubes confined with FRP was established, the model may be divided into three portions：the elastic stage, the strengthening stage and the descending stage. The model reflects the main characteristics of stress-strain relationship of concrete filled steel tubes confined with FRP,the effect of each factor on the mechanical behavior is well considered. The predictions of the model agree well with test data.

关 键 词：FRP 钢管混凝土 应力-应变关系 承载力 

分 类 号：TU375[建筑科学—结构工程] TU528