塑性计算法就是在弹性计算法的基础上,适当调整支座弯矩与跨中弯矩之间的比例关系,使支座配筋量有所减少,以达到节约材料、简化构造和便于施工的目的。塑性计算的具体方法就是按塑性阶段的弯矩M_塑≥0.7M_弹(弹性阶段的弯矩)的这一个调整值,去减 The plasticity calculation method is based on the elastic calculation method, and appropriately adjusts the proportional relationship between the bending moment of the bearing and the bending moment at the mid-span, so that the amount of reinforcement in the bearing is reduced, so as to save materials, simplify the structure, and facilitate the construction. purpose. The specific method of plastic calculation is to reduce the plastic moment by the adjustment value of the bending moment M_plastic ≥ 0.7M_bomb (the moment of the elastic phase) in the plastic stage.