长细比对CFRP约束钢管混凝土柱偏心受压力学性能的影响研究  

Effect of Slenderness Ratio on the Mechanical Behavior of CFRP-Confined Concrete-Filled Steel Tubular Columns Subjected to Eccentric Compression

作　　者：于洋[1] 刘占宇 梅宝瑞 张云峰[1] YU Yang;LIU Zhanyu;MEI Baorui;ZHANG Yunfeng(College of Civil and Architectural Engineering,Northeast Petroleum University,Daqing 163318,Heilongjiang China)

机构地区：[1]东北石油大学土木建筑工程学院,黑龙江大庆163318

出　　处：《河南科学》2020年第4期586-593,共8页Henan Science

基　　金：国家自然科学基金(51308028)。

摘　　要：为研究长细比对CFRP约束钢管混凝土柱受力性能的影响,应用ABAQUS建立四组、每组3个试件进行对比分析.组内试件的钢管约束效应系数εs、CFRP约束效应系数εc f、偏心率等影响因素相同,分析不同长细比对组合柱力学性能产生的影响.结果表明,长细比对CFRP最大应力影响不大.随着长细比的增加,钢管的最大等效应力值降低,钢管套箍作用减弱.不同钢管约束效应系数情况下,荷载-挠度曲线形式基本一致.试件刚度值随长细比增加逐渐降低,组合柱极限承载力下降,但降低幅度逐渐变缓.In order to study the effect of slenderness ratio on the mechanical behavior of CFRP-confined concretefilled steel tubular columns,ABAQUS was used to establish four groups of three specimens for comparative analysis.The influence factors of the steel tube constrained effect coefficient,CFRP restraint effect coefficient and eccentricity of the test specimens in the group were the same,and the influence of different slenderness ratio on the mechanical properties of the composite column was analyzed.The results show that the slenderness ratio has little effect on the maximum stress of CFRP.As the slenderness ratio increases,the maximum equivalent stress value of the steel pipe decreases,and the effect of the steel pipe hoop is weakened.In the case of different steel tube constrained effect coefficients,the load-deflection curve forms are basically the same.The stiffness value of the specimen decreases with the increase of the slenderness ratio,and the ultimate bearing capacity of the composite column decreases,but the decreasing extent gradually becomes slower.

关 键 词：长细比 偏心受压 CFRP 极限承载力 

分 类 号：TU398[建筑科学—结构工程]