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混凝土电杆的“规范设计方法”是一个新的电杆计算方法,即电杆的预应力钢筋用量由抗裂条件确定,一般也能满足强度条件(为预应力电杆);如不能满足强度条件,则通过计算后加配非预应力钢筋(为混合配筋形式的电杆)。电杆配筋型式由设计结果确定,这是“规范设计方法”的重要特点。“规范设计方法”比先假设钢筋面积而后进行强度和抗裂验算的“假设验算方法”容易掌握、计算简捷、钢筋用量省并较好地解决了预应力钢筋沿电杆环形截面周边布置与电杆使用受荷随机性的矛盾。
The “standard design method” of concrete poles is a new pole calculation method. That is, the amount of prestressed steel bars used in electric poles is determined by the anti-crack conditions, and generally it can also satisfy the strength conditions (for prestressed poles); if it cannot meet the strength The conditions are then calculated by adding non-prestressed steel (in the form of a hybrid reinforcing bar). The type of pole reinforcement is determined by the design results. This is an important feature of the “standard design method”. The “normative design method” is easier to understand than the “assumed checking method” for preliminarily assuming the area of steel bars and then performing strength and anti-crack checking. The calculation is simple, the amount of steel bars is saved, and the arrangement of the prestressed steel bars along the circular cross section of the electric poles is well solved. Rods use the contradiction of randomness.