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圆形钢筋混凝土桥墩抗震性能试验评估(Ⅰ):试验设计及初步结果

DOI: 10.3969/j.issn.1674-0696.2011.05.001, PP. 889-894

Keywords: 钢筋混凝土桥墩,拟静力正交试验,延性能力,试验评估,r/cbridgecolumns,orthogonalpseudo-statictest,ductilitycapacity,experimentalevaluation

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Abstract:

:?根据现行《公路桥梁抗震设计细则》的基本要求,设计了三水平、四因素圆形钢筋混凝土桥墩拟静力正交弯曲破坏试验,并以墩顶力-位移滞回曲线、墩顶总位移的弯曲变形、剪切变形和应变渗透变形分量及截面平均曲率为主要测试对象,进行了相应的试验研究。结果表明:各桥墩的弯曲损伤破坏过程相似;纵筋率较低,轴压比较高的桥墩存在一定的剪切机制作用;纵筋直径较小的桥墩在纵筋发生断裂时能承受的循环加载次数较少;墩底区域混凝土振捣不密实对桥墩延性能力的发挥有不利影响。

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