钢纤维高强混凝土框架边节点抗震性能研究

Experimental investigation and finite element analysis on seismic behavior of steel fiber reinforced high-strength concrete exterior joints

通过2个钢纤维高强混凝土框架边节点的低周反复加载试验研究和有限元分析,探讨了梁端钢纤维掺加范围对该类型节点抗震性能的影响。结果表明,增加梁端钢纤维掺加范围,增强了梁端受力性能,但是相对减小了节点核心区的抗剪性能,降低了框架节点的延性和耗能能力,增大了节点刚度退化程度和剪切变形,加快了框架节点承载力退化速率。

By experimental investigating and finite element analysis the two steel fiber reinforced high-strength concrete frame exterior joint under the low cycle loading, discussed the influence of the adding range of steel fiber of the joint of this type.The result shows that, with the increase of the adding range of steel fiber,it enhances the mechanical capacity of the beam end ;reduces the shearing-resistance capacity of the core area of the area;reduces the joint ductility and the energy dissipation capacity;increases the rigidity degeneration degree and shearing deformation;speed up the degeneration degree of resistance capacity.