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对7根内置钢骨的GFRP管混凝土中长柱进行偏压试验,分析中长柱的破坏形态、荷载-侧向挠度关系曲线、荷载-应变关系曲线及挠度曲线,研究长细比、偏心距和混凝土强度对柱偏压承载力和荷载-侧向挠度关系曲线的影响。试验研究表明:在偏压荷载作用下,试件变形现象明显,破坏时,GFRP管外表面出现白纹;极限荷载后,其承载力缓慢下降,表现出较好的延性性能;内置钢骨GFRP管混凝土中长柱的荷载-侧向挠度曲线可以分为弹性、弹塑性和塑性3个阶段;长细比和偏心距是影响内置钢骨的GFRP管混凝土中长柱承载力的主要因素;随着长细比和偏心矩的增大,柱的承载力逐渐降低;内置钢骨GFRP管混凝土中长柱的偏压承载力随混凝土强度的增加而增加;而偏心距的增大降低了混凝土强度对内置钢骨GFRP管混凝土中长柱偏压承载力的影响。
Seven GFRP-reinforced concrete long columns with built-in steel skeleton were subjected to a bias test to analyze the failure mode, load-lateral deflection curve, load-strain curve and deflection curve of the long column, and to study the slenderness ratio, eccentricity distance And the effect of concrete strength on the relationship between the column bearing capacity and the load-lateral deflection. The experimental results show that the deformation of the specimen is obvious under the biasing load, and the appearance of white lines on the outer surface of the GFRP tube is damaged under the biasing load. After the ultimate load, the bearing capacity of the GFRP tube decreases slowly and shows good ductility. The load-lateral deflection curves of long columns in concrete-filled concrete can be divided into three stages of elasticity, elasto-plasticity and plasticity. The slenderness ratio and eccentricity are the main factors affecting the bearing capacity of long columns in GFRP concrete with built- The slenderness and slenderness ratio and eccentric moment increase, and the bearing capacity of columns decreases gradually. The bearing capacity of GFRP-reinforced concrete long column with steel increases with the increase of concrete strength, while the eccentricity increases the strength of concrete Influence of Built - in Steel GFRP Tube on Longitudinal Column ’s Bias Bearing Capacity.