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对于支承双向板等跨钢筋混凝土连续梁,由于目前尚未有可直接应用的塑性设计弯矩值,设计工作者常感不便。由于设计实践和教学实践需要,算出了可以直接应用的这些弯矩值。兹介绍如下: 一、方法一——弯矩系数法截面塑性设计弯矩系按下述原则计算: (1)支座截面塑性弯矩值取不小于按弹性分析所得的最大弯矩的70%(即调整值不大于30%),并不小于当按弹性分析所得跨中弯矩为最大时相应的支座弯矩。
For the support of two-way slabs and other cross-reinforced concrete continuous beams, because there is no direct application of plastic design bending moment value, the design staff often feel inconvenience. Due to design practice and teaching practice needs, these bending moment values that can be applied directly are calculated. It is described as follows: 1. Method One—Moment Moment Factor Method The plastic design cross-sectional bending moment is calculated according to the following principles: (1) The plastic bending moment value of the bearing section is not less than 70% of the maximum bending moment obtained from the elastic analysis. (In other words, the adjustment value is not more than 30%.) It is not less than the bending moment of the corresponding bearing when the bending moment at the mid-span obtained by the elastic analysis is maximum.