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考虑界面剥离的粘贴钢板加固RC梁非线性有限元分析

, PP. 57-62

Keywords: 桥梁工程,钢筋混凝土梁,粘贴钢板加固,剥离,非线性有限元

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Abstract:

提出了一种能够进行外贴钢板加固钢筋混凝土梁剥离破坏分析的三维非线性有限元分析模型,该模型采用一种以粘贴钢板试件剪切试验为依据确定其剥离准则的特殊的、具有剥离破坏功能的界面单元来模拟外贴钢板和混凝土梁之间的粘贴层,界面单元的剥离破坏通过粘贴层的最大剪应力与达到剥离时的正应力的关系来确定的。用所建立的模型对外贴钢板加固试验梁的非线性全过程破坏分析结果表明数值分析结果在实际试验梁的荷载-跨中挠度曲线、破坏时钢板的剥离性态及梁体混凝土开裂模式方面均与试验结果基本一致。

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