超高韧性水泥基复合材料连梁斜截面承载力试验研究

Experimental study on bearing capacity of oblique section of ultrahigh toughness cementitious composite coupling beams

完成了6个超高韧性水泥基复合材料连梁和1个钢筋混凝土试件的低周反复荷载试验,分析了连梁滞回性能和抗剪强度等力学性能,研究了连梁跨高比变化、配箍率等参数对连梁抗震性能的影响。研究结果表明:超高韧性水泥基复合材料连梁的滞回曲线呈反S形,但较钢筋混凝土连梁的滞回曲线更为饱满,给出了超高韧性水泥基复合材料连梁斜截面抗剪承载力的建议公式。

Experimental investigation on the six ultrahigh toughness cementitious composite materials coupling beam and one RC coupling beam specimens under low cyclic reversed loading was completed. The mechanical properties, such as hysteretic behavior and shear strength etc. of the coupling beam were analyzed. The influence of span-depth ratio change and stirrup ratio of the coupling beam on seismic behavior of the beam was analyzed. Test results indicate that hysteretic loops of ultrahigh toughness cementitious composite coupling beam show a reversed S-shape, the hysteretic loops are more full than those of reinforced concrete coupling beams. The formula of shear bearing capacity of coupling beam of ultra high toughness cementitious composites was proposed.