Y型偏心钢支撑加固震损混凝土框架的滞回性能试验

为研究Y型偏心钢支撑加固震损混凝土框架结构的抗震性能,通过对2榀1/3缩尺、单层、单跨损伤的混凝土框架采用Y型偏心钢支撑加固后的低周往复加载试验,系统研究Y型偏心支撑加固震损混凝土框架的滞回性能、刚度退化、延性性能、耗能能力及耗能梁段的剪切变形等。结果表明:Y型偏心钢支撑加固震损混凝土框架具有较高的水平承载力和抗侧刚度,并具有较强的耗能能力。随着耗能梁段腹板高度的增加,加固后试件的水平承载力有所提高,但试件的位移延性和耗能等性能略有劣化。

CYCLIC TEST OF DAMAGED RC FRAMES RETROFITTED WITH Y-ECCENTRICALLY STEEL BRACE

In order to investigate the seismic behavior of the damaged RC frames retrofitted with Y-eccentrically steel brace under low reversed cyclic loading,two one-bay,one-story test specimens of one-third scale were built and tested.The hysteretic behavior,stiffness degradation,plastic deformation capacity,ductility and energy dissipation capacity were analyzed.The results indicate that test specimens show large lateral stiffness and lateral strength,and also have good energy dissipation capacity.With the increase of the height of energy dissipation link webs,the lateral bearing capacity of the test specimens increased.However,the ductility and energy dissipation capacity decreased slightly.