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随着高层抗震建筑的发展,极需要大幅度提高钢筋混凝土柱的强度及延性,但因高强混凝土的脆性及受混凝土极限压缩值的控制,使高强混凝土及高强纵筋在柱中的应用受到了限制。本文通过试验说明当用密排箍筋约束混凝土侧向变形条件下,不但能克服高强混凝土的脆性大幅度提高其强度及延性,而且还能使它与高强纵筋(Ⅴ级钢筋)很好地协同工作,从而使这类柱子具有良好的力学性能。
With the development of high-rise earthquake-resistant buildings, the strength and ductility of reinforced concrete columns are greatly increased, but due to the brittleness of high-strength concrete and the control of the ultimate compression value of concrete, the application of high-strength concrete and high-strength longitudinal reinforcement in columns is affected. limit. In this paper, through experiments, it is shown that when the concrete is confined by the side-by-side hoops, the brittleness of the high-strength concrete can be greatly improved and the strength and ductility of the concrete can be improved, and it can also make it well with the high-strength longitudinal reinforcement (V-bar). Work together to make such columns have good mechanical properties.