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以基本的力学理论为依据,对双筋矩形截面混凝土墩柱受力模式进行简化,通过力学平衡方程,从理论上分析了墩柱的受力过程,进而在考虑混凝土受拉的条件下,求解出墩柱开裂截面中性轴的位置.本文计算公式可适用于钢筋混凝土悬臂桥墩变形分析,对后期截面刚度的计算以及墩柱混凝土开裂前沿的求解也有一定的参考意义.
Based on the basic theory of mechanics, the stress mode of the double-bar rectangular concrete column is simplified. The mechanics equilibrium equation is used to analyze the stress process of the pier column. Then, considering the concrete tension, The position of the neutral axis of the cracked section of the pier is obtained.The formula of this paper can be applied to the deformation analysis of the cantilever pier of the reinforced concrete and has certain reference value for the calculation of the post section stiffness and the solution of the crack front of the pier concrete.