碳纤维增强方钢管混凝土压弯构件的静力性能(I)——试验研究与有限元模拟  

STATIC PERFORMANCE OF CONCRETE FILLED SQUARE STEEL TUBULAR BEAM-COLUMN STRENGTHENED BY CFRP EXTERNALLY(I) :EXPERIMENTAL STUDY AND FINITE ELEMENT SIMULATION

作　　者：王庆利[1] 陈星宇[1] 张芝润 

机构地区：[1]沈阳建筑大学土木工程学院,沈阳110168

出　　处：《工业建筑》2014年第7期141-145,共5页Industrial Construction

基　　金：国家自然科学基金面上项目(51378320);辽宁省科学事业公益研究基金项目(2013003004)

摘　　要：以长细比和偏心率为主要参数,对24个碳纤维(CFRP)增强方钢管混凝土(S-CF-CFRP-ST)压弯构件进行静力性能的试验研究。试验结果表明,构件的轴力-中截面挠度曲线可以分为3个阶段:弹性段、弹塑性段和下降段。通过分析试验结果发现,钢管与CFRP可以协同工作;构件的挠曲线近似为正弦半波曲线。应用ABAQUS软件模拟了试件的轴力-中截面挠度曲线和变形模态,模拟结果与试验结果吻合良好。Taking slenderness ratio and eccentricity ratio as the principal factors , static behavior of 24 pieces of concrete filled square steel tubular beam-columns strengthened by CFRP externally （ S-CF-CFRP-ST ） were experimentally investigated .The test results showed that the axial load-deflection curves on the cross-section at mid-height of the composite members could be divided into elastic stage , elasto-plastic stage and softening stage .Analysis on the experimental results showed that the steel tube and its outer CFRP material could cooperate both longitudinally and transversely , in addition , deflection curves of the tested members behaved much similarly as half sinusoidal curve.The failure modes and the axial load-deflection curves on the cross-section at mid-height of the specimens were simulated by using ABAQUS software .The simulated results agreed well with experimental values .

关 键 词：碳纤维增强方钢管 填充混凝土 压弯构件 试验研究 有限元模拟 

分 类 号：TU398.9[建筑科学—结构工程]