钢管-混凝土组合柱在我国的研究进展与展望

The Research Progress and Prospect of Steel Tube-concrete Composite Column in China

大量大跨桥梁、超高层建筑以及大型深海工程不断兴建,其中的承重柱承受极大的荷载,单纯依靠钢筋混凝土已经不能满足承载力和使用功能的要求,钢管—混凝土组合柱因其具有承载力高、塑性和韧性好、节约材料、方便施工等优点得到了广泛的应用。钢管—混凝土组合柱主要包括钢管混凝土柱、钢管混凝土叠合柱、钢管约束混凝土柱,对这三种钢管—混凝土组合柱从静力性能、抗震性能以及耐火性能等多方面的研究进展进行了系统总结和阐述。最后指出组合柱在复杂受力状态下的研究盲点,以及将再生混凝土和超高强混凝土应用于组合柱的发展前景,进一步推动组合结构的发展。

With the construction of many long-span bridge ,super high-rise buildings and large-scale deep sea engineering projects ,in which the load-bearing pillars are under tremendous stress ,the strength and serviceability of reinforced concrete columns alone cannot meet the contemporary demands .Steel tube-concrete columns have been widely used in those structures mentioned above ,due to their high loading capacity ,plasticity and ductility ,low cost and the convenience of construction .The steel tube-concrete columns mainly include concrete-filled steel tube columns （CFST ） ,concrete-filled steel tube reinforced concrete columns （CFSTRC ） and steel tube confined concrete columns （STC ） ,the research progress of which were systematically summarized and explained from aspects of static behavior ,seismic behavior and fire resistance .At last ,this paper pointed out the blind spot in the study of complicated loading states ,and the prospect of applying recycled aggregrate concrete and ultra-high strength concrete in steel tube-concrete columns ,in order to further promote the development of composite structures .