低周反复荷载下再生混凝土框架边节点受力性能试验研究

文章对再生混凝土框架边节点的受力性能进行了研究,通过2榀边节点试件在低周反复荷载下的试验,了解节点的破坏过程、承载能力、滞回曲线、耗能性能和延性指标,分析节点核心区剪切破坏和梁端弯曲破坏2种破坏模式对构件承载能力和延性性能的影响。研究表明,再生混凝土框架边节点构件发生梁端弯曲破坏时,纵向钢筋屈服,截面充分转动,滞回曲线丰满,具有良好的耗能能力,可满足抗震性能要求。

Experimental study of mechanical behavior of recycled aggregate concrete frame exterior joints under low reversed cyclic loading

Two frame exterior joints specimens of recycled aggregate concrete(RAC) were tested under low reversed cyclic loading to study their seismic behavior,including failure process,carrying capacity,hysteretic curves,energy dissipation capacity and ductility index.The beam-column joints core shear failure and the beam-ends flexural failure described in this paper respectively has certain effect on the carrying capacity and ductility of two RAC specimens.When the beam-ends flexural failure occurs,the RAC frame exterior joints specimens have satisfying energy dissipation capacity with yielding longitudinal reinforcement,fully-rotated sections and full hysteretic curve,which can meet the seismic requirements.