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槽口型开孔板连接件抗剪及抗拉拔性能试验

, PP. 119-124

Keywords: 桥梁工程,开孔板连接件,模型试验,组合桥,承载性能,槽口

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Abstract:

?为解决开孔板连接件从侧面圆孔内难以贯穿钢筋的施工难题,提出了开孔板圆孔外缘设置有槽口的钢与混凝土连接构造形式,通过4组共12个模型试件的推出及拉拔试验,比较研究了开孔板连接件设置槽口与否的抗剪及抗拉拔承载性能。研究结果表明:无论开孔板连接件设置槽口与否,其结合面垂直方向均具有较高的承载性能;槽口对抗剪、抗拉拔承载力的影响不超过10%,对刚度的影响不超过8%;循环加载时抗拉拔承载力比单调加载时降低幅度不超过10%,在正常使用极限状态下的残余分离量极小,具有较好的抗拉拔变形性能。

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