FRP与钢双管约束混凝土应力-应变关系理论模型  

THEORETICAL MODEL FOR STRESS-STRAIN RELATIONSHIP OF CONCRETE CONFINED WITH FRP AND STEEL DOUBLE-SKIN TUBES

作　　者：胡波[1] 王建国[1] 

机构地区：[1]合肥工业大学土木与水利工程学院,合肥230009

出　　处：《工程力学》2010年第7期154-160,共7页Engineering Mechanics

基　　金：土木工程防灾减灾安徽省工程技术研究中心(2007368)

摘　　要：在平面应变条件下对FRP-混凝土-钢混合双管柱进行力学分析,考虑混凝土和钢管的弹塑性,通过FRP管有无达到极限状态判断试件是否破坏,提出FRP与钢双管约束混凝土应力-应变关系理论模型,理论计算曲线与试验曲线吻合较好。在理论模型基础上对FRP与钢双管约束混凝土应力-应变曲线进行参数分析,考察FRP管类型、空心率、钢管径厚比、混凝土强度以及钢管强度对混凝土应力-应变曲线的影响,研究表明FRP管类型、空心率和混凝土强度对应力-应变曲线有影响,钢管径厚比和钢管强度几乎没有影响。Mechanical analysis of FRP-concrete-steel hybrid double-skin tubular columns is presented in plane strain conditions. A theoretical model of stress-strain relationship is proposed with the consideration of Elasto-plasticity of concrete and steel tube. The specimens are considered to be damaged when the ultimate state of FRP tube is achieved. The calculation results are in good agreement with experimental results. Based on the theoretical model, parametric analysis is presented. The results indicate that the stress-strain curves are affected by FRP tube type, void radio and concrete strength. However, diameter-to-thickness ratio and strength of steel tube have little influence on the stress-strain curves.

关 键 词：FRP管 钢管 约束混凝土 应力-应变关系 理论模型 

分 类 号：TU398.9[建筑科学—结构工程] TU318