论文部分内容阅读
完成了4个足尺再生混凝土框架梁柱中间节点在低周反复荷载作用下的试验,主要目的是研究低轴压比条件下再生混凝土节点区的粘结锚固性能.主要研究参数为节点核心区尺寸(hc)与纵筋直径(d)的比值.结果表明,相对锚固长度(hc/d)为20.5和22.5的试件在加载后期发生粘结滑移,相对锚固长度为25的试件无明显的粘结滑移现象,最终发生梁端塑性铰破坏.为避免发生显著的粘结滑移,建议再生混凝土节点区相对锚固长度hc/d应适当提高.
The main purpose of the experiment is to study the anchoring and anchoring performance of the recycled concrete node under low axial compression ratio.The main research parameters are the core area of the node (Hc) to the diameter of longitudinal bar (d) .The results show that the specimens with relative anchoring length (hc / d) of 20.5 and 22.5 are bonded and slip in the late loading stage, and the specimens with relative anchoring length of 25 Obvious sticking and slip phenomenon, finally the plastic hinges of the beam ends will be destroyed.In order to avoid the occurrence of significant stick-slip, it is suggested that the relative anchorage length hc / d of recycled concrete node area should be properly increased.