钢筋混凝土叠合梁抗剪承载力灰色关联分析

Grey Correlation Analysis of Ultimate Shear Strength on Reinforced Concrete Composite Beam

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

The ultimate shear strength on the reinforced concrete composite beam are analyzed by grey system theory as well as the correlation factors of shear spans λ,precast concrete strength grade f cu1 ,postcast concrete strength grade f cu2 ,composite characteristic parameter s a h=h 1/h,a m=M 1/〔M 1〕 M The analysis result shows that the first factor influences the ultimate shear strength on the reinforced concrete composite beam is precast concrete strength grade and the factors pastcast concrete strangth grade,composite characteristic parameter.The less influence shear spans λ has less influence