1 前言新的混凝土结构设计规范中,对小偏压构件的计算较原规范有很大改进,计算公式与人偏压时计算公式在形式上统一,与试验结果能较好地符合。按文献[l]规定,在小偏压计算时须考虑附加偏心距e_a。计算对称配筋小偏压构件时,会出现(?)的三次方 1 Introduction In the new design specifications for concrete structures, the calculation of small biased members has been greatly improved over the original specification. The calculation formula and the calculation formula for human bias are unified in form and are in good agreement with the test results. According to [l], the additional eccentricity e_a must be taken into account when calculating the small bias voltage. When calculating the symmetric reinforcement small biasing member, the (?) third power will appear