提出了钢筋混凝土矩形梁截面高度设计的一种新的实用计算方法 ,该方法首先确定梁的挠度计算值 ,然后按长期刚度 ,短期刚度 ,受拉钢筋应变不均匀系数 ,按荷载短期效应组合计算的纵向钢筋应力值的反推顺序 ,最终计算出梁的截面高度 A new practical calculation method for the height design of rectangular sections of reinforced concrete beams is proposed. The method first determines the calculated deflection of the beams, and then combines the long-term stiffness, short-term stiffness, and the non-uniform coefficient of tensile reinforcement strains according to the short-term effect of the load. The reversal order of the longitudinal steel stress values ​​and the final calculation of the beam section height