中文摘要：

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。

英文摘要：

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 .