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对5个中间层钢筋活性粉末混凝土框架边节点试件进行了拟静力加载试验,得到了此类节点的破坏过程和破坏特点,明确了各阶段剪力的传递和分配。在试验研究的基础上,采用简化拉-压杆模型并考虑纤维抗拉拔阻力的有利作用,建立了钢筋活性粉末混凝土框架边节点在复合作用下的受剪承载力计算模型,并通过试验验证了此模型的可行性。结果表明:按照此模型计算得到的节点核心区受剪承载力与试验实测值吻合较好,离散度较小,其值与试验实测值的平均比值为1.05,变异系数为0.11;而且此模型亦能较合理地反映轴压比、配箍率及纵筋强度对节点受剪承载力的影响。
Quasi-static loading tests were carried out on the specimens of the five joints of the reinforced concrete frame with the middle layer. The failure process and failure characteristics of such joints were obtained, and the transfer and distribution of the shear in each stage were clarified. Based on the experimental study, a simplified pull-strut model and considering the favorable effect of anti-drawing resistance of fiber were established to calculate the shear capacity of the reinforced concrete reactive power concrete frame under joint action. Feasibility of this model. The results show that the calculated shear strength of the core of the joint calculated by this model is in good agreement with the experimental value and the dispersion is small. The average ratio of the value to the experimental value is 1.05 and the coefficient of variation is 0.11. It can reasonably reflect the influence of axial compression ratio, stirrup ratio and longitudinal reinforcement strength on the shear capacity of joints.