钢骨及聚丙烯纤维增强异形柱边节点抗震性能试验研究

SEISMIC PERFORMANCE EXPERIMENTAL RESEARCH ON STEEL AND POLYPROPYLENE FIBER REINFORCED SPECIAL-SHAPED COLUMN EDGE NODE

通过对4个在核心区进行钢骨或聚丙烯纤维增强的异形柱边节点进行拟静力试验,在低周反复荷载作用下分析各节点的承载力、位移延性、恢复力特性,包括滞回曲线、耗能能力、刚度退化曲线,对比钢骨增强边节点、纤维增强边节点以及普通边节点各个抗震指标。研究表明:采用钢骨增强和聚丙烯纤维增强均能够改善节点核心区的裂缝开展形态,提高节点的开裂荷载、变形能力,延缓节点的后期刚度退化,尤其是在变形能力、延缓节点后期刚度退化方面,钢骨增强节点优势更加明显。

Under the low cyclic loading , 4 steel and polypropylene fiber reiforced special-shaped column edge nodes were tested, and the bearing capacity , displacement ductility , the restoring force characteristics of each node were analyzed , including hysteresis curves , energy dissipation and stiffness degradation curve , it was compared seismic indicators of steel framed reinforced edge node , fiber reinforced edge node and ordinary node .The research shows that the steel and polypropylene fiber reinforcement can all improve the shear crack form , increase the cracking load and deformation ability of the nodes , delay node rigidity degradation in later stage , especially in the deformation capacity , steel reinforced node has a more obvious superiority .