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为研究加筋高性能砂浆(HPFL)-粘钢联合加固混凝土柱的轴心抗压承载能力,进行了8根HPFL-粘钢联合加固RC柱轴压试验,结合国内已有的35根HPFL加固柱轴压试验结果,分析了加固柱的破坏机理和承载力影响因素,并提出此类加固柱轴压承载力计算方法。研究结果表明:此类加固柱共同工作性能良好,极限承载力提高了22%~52%;角钢倒角对钢绞线早期剪断有很大影响;粘贴角钢时加固箍筋强度折减系数取0.55,若无粘贴角钢并对构件进行适当倒角时可取0.72,倒角直径大于边长1/3时可取1.0;钢板表面砂浆的承压有效利用系数取0.7,其余部分取0.3;提出的承载力公式计算值与试验值符合较好,可用于轴压柱加固承载力计算。
In order to study the axial compressive loading capacity of reinforced high performance mortar (HPFL) -silten steel reinforced concrete columns, eight HPFL-bonded steel RC columns were subjected to axial compression test, Column axial compression test results, the failure mechanism of reinforced columns and the influencing factors of bearing capacity are analyzed, and the calculation method of bearing capacity of such columns is proposed. The results show that the reinforcement columns work well together and the ultimate bearing capacity is increased by 22% -52%. Angle chamfering has a great influence on the early shearing of steel strand. The strength reduction coefficient of the reinforcement stirrups when gluing the angle steel is 0.55 , If there is no affixed angle and the appropriate chamfering member desirable 0.72, chamfering diameter greater than the side length of 1/3 can be taken 1.0; effective pressure coefficient of the surface of the mortar to take 0.7, the rest 0.3; the proposed bearing capacity The calculated value of the formula is in good agreement with the test value and can be used to calculate the bearing capacity of the axial compression column.