冷軋帶肋雙鋼筋混凝土梁裂縫寬度和剛度計(jì)算
祝明橋
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祝明橋 （湘潭工學(xué)院土木系 411201）
[提要] 通過7根試驗(yàn)梁的研究，分析了冷軋帶肋雙鋼筋混凝土梁在正常使用狀態(tài)下裂縫分布、裂縫寬度和撓度變形的規(guī)律，提出了梁的鋼筋強(qiáng)度設(shè)計(jì)值及裂縫和剛度計(jì)算公式，使計(jì)算值更好地與實(shí)測值吻合。
[關(guān)鍵詞] 冷軋帶肋雙鋼筋 混凝土梁 裂縫寬度 剛度 強(qiáng)度設(shè)計(jì)值Based on the experimental study and theoretical analysis about crack distribution, crack width and deformation of the 7 concrete beams reinforced with cold-rolled ribbed bi-bar under serviceability limit state, the formulas about crack width and rigidity of the beams, and the design strength of reinforced bar are proposed. The results calculated with the formulas conform to the experimental ones.
Keywords: cold-rolled bi-bar; concrete beam; crack width; rigidity; design strength
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