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应用灰色系统理论，对钢筋混凝土叠合梁抗剪承载力及其关联因子剪跨比 λ、预制梁混凝土强度等级ｆｃｕ１、叠合层混凝土强度等级ｆｃｕ２ 、叠合特征参数αｈ ＝ ｈ１／ｈ、叠合特征参数α Ｍ ＝ Ｍ１ ／［ Ｍ１］进行关联度分析。分析结果表明，对叠合梁抗剪承载力影响最大的因子是预制梁混凝土强度等级ｆｃｕ１ ，其次是叠合层混凝土强度等级ｆｃｕ２ 、叠合特征参数 αｈ 和叠合特征参数α Ｍ ，影响最小的因子是剪跨比 λ
Applying the grey system theory, shear capacity ratio of reinforced concrete composite beams and its associated factor shear ratio λ, precast beam concrete strength grade fcu1, laminated layer concrete strength grade fcu2, superimposed characteristic parameter αh = h1/h, stack The combined characteristic parameter α M = M1 /[ M1 ] is used for correlation degree analysis. The analysis results show that the factor that has the greatest influence on the shear capacity of composite beams is the prefabricated beam concrete strength grade fcu1, followed by the laminated layer concrete strength grade fcu2, the lamination feature parameter αh, and the lamination feature parameter α M, with minimal impact. Factor is the shear ratio λ