FRP纤维缠绕角度对FRP管约束钢骨混凝土中长柱偏压力学性能的影响分析  

Fiber winding angle influence analysis on mechanical behavior of steel-encased concrete filled FRP tubular column subjected to eccentric compression load

作　　者：张海霞[1] 何禄源 曹朋朋[1] 

机构地区：[1]沈阳建筑大学土木工程学院,辽宁沈阳110168

出　　处：《建筑结构学报》2013年第S1期345-352,共8页Journal of Building Structures

基　　金：辽宁省高等学校优秀人才支持计划项目(LJQ2012053)

摘　　要：利用ABAQUS有限元分析软件,对20个FRP管约束钢骨混凝土偏压中长柱进行有限元分析,将有限元分析结果与已有试验结果进行对比,在验证有限元分析结果正确的基础上,针对组合柱的受力全过程进行有限元分析,研究FRP纤维单、双向缠绕角度对组合柱偏压力学性能的影响,进一步分析FRP管、钢骨协同工作性能。研究表明:偏心受压中长柱的受力过程可分为弹性阶段、弹塑性阶段和破坏阶段3个阶段;对于FRP管壁纤维单缠绕构件,长细比为5时,其极限荷载随着缠绕角度的增大而增大;长细比为8时,其极限荷载随着缠绕角度的增大而降低,但后期延性性能却有所提高;对于FRP管壁纤维同向交替缠绕构件,长细比为5时,其极限荷载均比相应的单向缠绕角度的构件低;长细比为8时,其极限荷载均比相应的单向缠绕角度的构件高;对于长细比为8的FRP管壁纤维双向交叉缠绕构件,其极限荷载均高于同组其他构件;偏压组合柱的截面应变符合平截面假定,各组成材料之间协同工作性能较好。The paper presented numerical simulation of 20 steel-encased concrete filled prefabricated FRP(fiber reinforced polymer) tubular columns through the finite element analysis software ABAQUS and verifies simulation results against experimental results in order to investigate the mechanical behavior of the composite column subjected to eccentric compression load.The full-range behavior and the fiber winding angle effect on the mechanical behavior of the composite column were analyzed.The interaction between FRP tubes and steel skeleton was studied further.The results indicate that the mechanical characteristic of composite column can be divided into three stages,namely,elastic stage,elasto-plastic stage and failure stage.The ultimate load of the column where the FRP tube is manufactured by one-way fiber winding can be increased with the increase of the winding angle of fiber when the length-to-diameter ratio of composite column is 5.On the contrary,the ultimate load decreases with the increase of winding angle of fiber,though the ductility performance is gradually improved when the length-to-diameter ratio is 8.For FRP tubes manufactured by alternate fiber winding,the ultimate load is lower than that of the column with one-way fiber winding angle when the length-to-diameter ratio is 5.When the length-to-diameter ratio is 8,the ultimate load is higher than that of the column one-way fiber winding angle.The ultimate load of the column with FRP tubes manufactured by two-way cross fiber winding is higher than those of other members.The strain of cross-section of the composite column satisfies plane cross-section assumption.And the interaction behavior between different materials is good.

关 键 词：FRP管约束钢骨混凝土 中长柱 FRP纤维缠绕角度 有限元分析 受力性能 

分 类 号：TU398.9[建筑科学—结构工程]