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四、截面正应力 荷载作用下正应力的计算按第一部份所述的方法进行。即将截面弯矩及有效预应力代换为一个大偏心力计算混凝土与钢筋应力,其中预应力钢筋应力等于有效预应力加上混凝土受拉边自预压状态到消压间的应力增量。
Fourth, the normal stress of the cross section The normal stress under load is calculated according to the method described in the first part. The cross-section bending moment and the effective prestress are replaced by a large eccentric force to calculate the stress of the concrete and the steel bar. The stress of the prestressed steel bar is equal to the effective prestress plus the stress increment between the prestressed state and the depressurization of the concrete under tension.