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型钢-混凝土组合加固装配式板梁桥铰缝试验

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Keywords: 桥梁工程,铰缝,试验研究,型钢-混凝土组合加固法,装配式板梁桥

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Abstract:

?为了研究采用型钢-混凝土组合加固的装配式板梁桥铰缝的受力性能和加固效果,对5组采用不同措施加固的模拟铰缝试件进行了静力加载试验研究。着重考察了各铰缝试件的破坏过程、破坏形态、裂缝发展情况、荷载-挠度曲线及极限荷载,根据试验结果分析了型钢-混凝土组合法加固的铰缝试件破坏机理,建立了加固试件的斜截面弯剪破坏计算模型并推导了承载能力计算公式。研究结果表明:采用型钢-混凝土组合加固后的铰缝表现为典型的斜截面弯剪破坏,具有较高的承载能力、刚度和良好的延性。

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