纵筋率对钢筋混凝土梁剪切强度的影响

无腹筋梁剪切强度试验数据虽然不少,但影响梁的剪切强度因素众多,单独研究纵筋率对钢筋混凝土梁剪切强度影响的试验数据不但不足且存在偏差。所以使用数据过滤的方法对最新文献全面收集的无腹筋矩形梁在集中荷载下的剪切试验数据进行过滤,从而减小数据缺失或偏差和其他因素对分析结果的影响,进而得到纵向配筋率对梁的剪切强度影响规律,提出考虑纵筋率影响的钢筋混凝土无腹筋梁剪切强度计算公式。

EFFECT OF LONGITUDINAL REINFORCEMENT RATIO ON SHEAR STRENGTH OF REINFORCED CONCRETE BEAMS

The parameters influencing the shear strength of reinforced concrete beams are various,the test data used to study the effect of longitudinal reinforcement ratio alone on shear strength of the beams is inadequate and biased although the whole database is large.With the data filtering algorithm the comprehensive shear strength test data from current literatures of reinforced concrete rectangular section beams without stirrups under concentrated load are filtered,and then the influence of data missing,bias and other parameters is minimized.So the law of the effect of longitudinal reinforcement ratio on the beam shear strength is derived,and with consideration of the effect of longitudinal reinforcement ratio the shear strength formula of reinforced concrete beams without stirrups is presented.