钢纤维高强混凝土及其在框架节点中的应用分析

Analysis of steel fiber reinforced high strength concrete and its application in frame joints

介绍了钢纤维高强混凝土的特点以及在框架节点中的应用,制作了1个高强混凝土和1个钢纤维高强混凝土框架中节点试件,研究其在低周反复荷载作用下的变形、强度和刚度退化、延性和耗能能力。结果表明:与普通混凝土节点相比,钢纤维混凝土节点的开裂荷载较高、承载能力和变形能力良好、滞回曲线更为饱满、延性和耗能指标也较高,有利于结构抗震,对于解决节点区箍筋过密有显著作用,指出了钢纤维高强混凝土具有广阔的应用前景。

Characteristics of steel fiber reinforced high strength concrete and its application in frame joints are introduced in this paper based on one sample of high strength concrete frame interior joints, and the other one of steel fiber reinforced high strength concrete under low cyclic loading, fundamental behaviors of the joint were achieved, which included deformation, strength and stiffness degradation, ductility and energy dissipa-tion. The results showed that the steel fiber reinforced high strength concrete frame joint had larger cracking load, better load-bearing capacity and excellent deformability compared with the high strength reinforced con-crete frame joint. The steel fiber had better effects on increasing the ductility, energy dissipation of the joint and improving the seismic behavior of the joint to some extent. The steel fiber reinforced high strength concrete with extensive application foreground is pointed out in detail.