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本文提出了钢筋混凝土矩形截面双向偏心受压应力的等效荷载法。这个方法是在双向偏心受压荷载N之外再附加一个双向偏心受拉荷载N′作为外荷载,使N′的大小与受拉区混凝土的拉应力总和等效,且使N′的作用点与受拉区混凝土拉应力的重心重合,由此得到的计算公式中不出现钢筋面积与座标两个参数,使计算得到简化,其公式形式与单向偏心受压应力公式相似,极适于手算。此外,本文也给出了棱形截面转化为矩形截面的方法上述方法已编制了电算专用程序并已在某大桥Y形墩中应用。
In this paper, the equivalent load method of bi-directionally eccentric compressive stress on the rectangular section of reinforced concrete is proposed. In this method, a bidirectional eccentric tensile load N ’is added as an external load in addition to the bidirectional eccentrically loaded load N so that the size of N’ is equivalent to the sum of the tensile stress of the concrete in the tension zone and the point of action of N ’ Which is coincident with the center of gravity of the concrete tensile stress in the tensioned zone. The calculated formula does not show the two parameters of the rebar area and the coordinate, so that the calculation is simplified. The formulas are similar to those of the uniaxial eccentric compression stress formula, Hand count. In addition, this paper also gives a method of converting a prismatic cross-section into a rectangular cross-section. The above method has been developed for computer-specific procedures and has been applied in a Y-shaped piers.