CFRP-钢管混凝土结构研究的进展与展望

PROGRESS AND PROSPECT IN REARCH ON CONCRETE FILLED CFRP-STEEL TUBULAR STRUCTURES

在预制的CFRP-钢管内部浇筑混凝土而形成以承受压力为主的构件,或者对需要增加新功能的或轻微受损的既有钢管混凝土结构进行CFRP增强、修复和加固,形成所谓的CFRP-钢管混凝土(CFRP-CFST)结构。CFRP-CFST可以充分发挥三向受压混凝土抗压强度高的优点,同时可以避免钢管的屈曲,并且承载力更高、耐久性更好。介绍了CFRP-钢管混凝土构件和节点静力性能和滞回性能的研究现状,包括试验研究、有限元模拟、理论分析、承载力指标以及构造措施等,最后指出了CFRP-CFST的复合受力、耐火性能以及框架和结构体系等后续研究内容。

The so-called concrete filled CFRP-steel tubular（CFRP-CFST） structure is obtained by infilling concrete into the precasted CFRP-steel tube,or by strengthening,repairing and reinforcing concrete filled steel tubular（CFST） structures with CFRP due to the requirement of new functions or due to slight damage.CFRP-CFST can perform the advantages of the high strength for concrete under tri-axial compression,and it can also simultaneously avoid the buckling of the steel tube.Therefore,it has higher bearing capacity and better durability.The present study of static behaviour as well as the hysteretic behaviour on CFRP-CFST structure is introduced here,which includes experimental study,finite element simulation,theoretical analysis,bearing capacity index and configuration measures.Finally,the advances and the perspectives in the future work on the CFRP-CFST under combined loading and its fire resistance,the frame structure and the structural system are presented.