土木工程学报1981年第1期丁大钧和金芷生同志的“部分预应力混凝土受弯构件刚度和最大裂缝宽度的计算”一文在提要中指出:“对相当于普通钢筋混凝土构件在弯矩M_1作用下,建立ψ_1公式所引用的ε_(y1)——ε_(y1)平行性关系和受压边缘混凝土平均应变综合系数ζ_1,给出了简单的数学论证。这也相当于论证了规范公式ψ所根据的ε_g——ε_g平行性关系和系数 Comrades Ding Dazhao and Jin Yusheng, “The Calculation of Stiffness and Maximum Crack Width of Partially Prestressed Concrete Flexural Members”, pointed out in the summary: “To the equivalent of ordinary reinforced concrete members under the action of moment M_1, The ε_(y1)—ε_(y1) parallelism referenced by the ψ_1 formula and the comprehensive coefficient 平均_1 of the average strain of the stressed edge concrete are established, and a simple mathematical proof is given, which is equivalent to the demonstration that the normative formula is based on Ε_g - ε_g parallelism and coefficients