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对八个设计的型钢混凝土T形柱试件进行静力单调抗剪加载试验,得到了剪切开裂荷载试验值。分析了剪跨比、轴压比、配箍率等参数对剪切开裂荷载的影响,引入了型钢、翼缘对剪切开裂荷载的提高系数α、θ,给出了型钢混凝土T形柱剪切开裂荷载的计算公式。结果表明:在一定范围内,剪切开裂荷载随剪跨比的增大而变小,随轴压比的增大而变大;随着配箍率的增大,试件的剪切开裂荷载变大;由计算公式所得剪切开裂荷载与试验值吻合较好。
Eight specimens of T-shaped steel reinforced concrete specimens were subjected to static monotonic shear loading test, and the shear cracking load test values were obtained. The influences of shear span ratio, axial compression ratio and stirrup ratio on the shear cracking load were analyzed. The increasing factors α and θ of the cracking load on the section steel and the flange were introduced. The T-shaped column shear Cracking load calculation formula. The results show that within a certain range, the shear cracking load decreases with the increase of shear span ratio and increases with the increase of axial compression ratio. With the increase of stirrup rate, the shear cracking load Becomes larger; the shear cracking load obtained by the calculation formula is in good agreement with the experimental value.