一个具有轴压比和配筋率参数的开裂弯矩计算公式

Calculation and Analysis for Cracking moment of Concrete Compressive and Flexural Member

根据钢筋混凝土矩形截面压弯构件的基本方程,导出了压弯构件的开裂弯矩表达式,通过计算,给出了开裂弯矩与混凝土强度等级、轴压比和配筋率之间的变化规律,从而得出了具有配筋率和轴压比参数的开裂弯矩计算公式,该公式形式简单,与试验结果符合较好。

With the basic formula of rectangular section concrete member with compression and flexure, the calculation formula of cracking moment of concrete compressive and flexural member was derived. Through calculation, a simplified calculation formula of cracking moment which is on the basis of concrete strength ,axial compression ratio and reinforcing bar ratio was built. The conclusion of this article fit well with the date of the experiment.