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钢绞线网-复合砂浆加固钢筋混凝土梁的受弯性能(英文)

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Keywords: 桥梁工程,高强钢绞线网,加固技术,截面弯矩-跨中挠度分析模型,换算截面法,抗弯性能

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Abstract:

分析了钢绞线网-复合砂浆加固钢筋混凝土梁的荷载-挠度曲线,研究了加固层与本体梁界面的粘结机理。将钢筋混凝土梁的受力性能分为未裂阶段、裂缝阶段和破坏阶段,在平截面假定的基础上,建立了高强钢绞线网-复合砂浆加固梁的截面弯矩-跨中挠度分析模型。采用换算截面法对加固梁在集中荷载作用下的抗弯性能进行全过程受力分析,并通过10根加固梁的试验数据对模型进行验证。分析结果表明截面屈服弯矩和极限弯矩试验值与模型计算值的平均比值分别为1.027、1.094,屈服跨中挠度和极限跨中挠度试验值与模型计算值的平均比值分别为1.286、0.918,因此,截面弯矩-跨中挠度模型可行。

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