碳纤维布加固混凝土框架外节点抗震性能试验研究

EXPERIMENT ON SEISMIC BEHAVIOR OF CFRPSTRENGTHENED EXTERIOR RC FRAME JOINTS

以碳纤维布对被加固构件混凝土的良好约束性能为纽带,结合多种加固补强材料,提出3种基于碳纤维布的抗震加固混凝土框架节点方法;并通过6个混凝土框架外节点试件的低周反复加载试验,从破坏模式、滞回特性、核心区剪切变形、强度与刚度退化以及耗能能力等方面,分析研究不同加固方法对节点抗震性能的改善效果。

Several strengthening materials could be added to CFRP-strengthening system because of the excellent characteristics of CFRP sheets and three strengthening schemes of beam-colunm joints based on CFRP sheets are put forward to upgrade the seismic behavior of those under designed RC frames. Based on the quasi-static test of six exterior RC beam - column joints, the effectiveness of the schemes was examined in aspect of failure modes, hysteretic response, shear deformation of joint cores, strength degradation, stiffness degradation and energy dissipation capacity.