CFRP圆钢管混凝土中长柱轴压承载力研究

Study on axial bearing capacity of concrete-filled circular CFRP-steel middle long columns

该文在钢管混凝土柱研究的基础上,进一步探究碳纤维布(CFRP)对圆钢管混凝土中长柱轴压承载力极限的影响。制作10根不同CFRP圆钢管混凝土中长柱进行轴压试验,探讨CFRP圆钢管混凝土中长柱的受力过程、破坏形态和轴压极限承载力,分析CFRP层数、混凝土强度、钢管壁厚与长细比对其极限承载力的影响,为CFRP圆钢管混凝土中长柱极限承载力的计算提供参考。结果表明,CFRP层数对圆钢管混凝土中长柱极限承载力提升巨大,混凝土强度、钢管壁厚与长细比的影响相对较小,可为CFRP圆钢管混凝土中长柱的工程应用提供有力支撑。

In this paper,based on the research of concrete-filled steel tubular columns,the influence of carbon fiber reinforced plastics(CFRP)on the axial bearing capacity limit of concrete-filled circular steel tubular(CFST)columns is further explored.On the basis of these,the mechanics characteristic,failure mode and ultimate bearing capacity of concrete-filled circular CFRP-steel middle long columns are discussed.The influence of CFRP layers,concrete strength,steel tube wall thickness and slender ratio on the ultimate bearing capacity are analyzed,which provides a reference for the calculation of ultimate bearing capacity of concretefilled circular CFRP-steel middle long columns.The results show that the number of CFRP layers has a great impact on the ultimate bearing capacity of concrete-filled circular CFRP-steel middle long columns,and the influence of concrete strength,wall thickness of steel tube and slender ratio are relatively small,which provides strong support for the engineering application of concrete-filled circular CFRP-steel middle long columns.