长孔型开孔板连接件抗剪性能试验研究

发布时间：2018-06-05 21:39

本文选题：组合桥 + 开孔板连接件　；参考：《土木工程学报》2014年05期

【摘要】：为解决组合结构桥梁开孔板连接件孔间距或板高受限的设计难题,提出将开孔板圆孔单向拓展为长孔的钢与混凝土连接构造新型式;以圆孔孔径、抗剪纵向或横向的开孔幅度即孔长、孔高等为变化参数,进行7组共21个模型试件的抗剪推出试验,比较研究不同孔形开孔板连接件的抗剪承载力、刚度及变形性能。研究结果表明:开孔面积相同时,长孔型与圆孔型开孔板连接件的抗剪承载力相当;抗剪刚度随孔径或孔高增加而增大,不受孔长变化影响;与开孔面积相同的圆孔型开孔板连接件比较,长孔型开孔板连接件沿抗剪纵向拓孔时峰值滑移量大幅增大,横向拓孔时峰值滑移量减小;在正常使用极限状态下的残余滑移量较小,各孔型开孔板连接件均具有较好的变形恢复能力。
[Abstract]:In order to solve the design problem of hole spacing or plate height limitation of perforated plate connection of composite structure bridge, a new type of steel concrete connection is proposed, which extends the round hole of perforated plate to long hole in one direction. The shear ducting tests of 21 model specimens were carried out in 7 groups with longitudinal or transverse opening amplitude i.e. hole length and hole height as variable parameters. The shear bearing capacity, stiffness and deformation properties of different perforated plate connections were compared and studied. The results show that the shear bearing capacity of the long hole joint is equal to that of the circular hole plate connector, and the shear stiffness increases with the increase of the aperture or the height of the hole, and is not affected by the length of the hole. Compared with circular perforated plate connectors with the same opening area, the peak slip value of long-pass perforated plate joints increases significantly along the longitudinal shear-resistant opening, while the peak slip decreases during transverse perforation. The residual slippage under the normal service limit state is small, and all the perforated plate connectors have better deformation recovery ability.
【作者单位】：同济大学;上海市政工程设计研究总院(集团)有限公司;
【基金】：交通运输部科技项目(2011318494160,2013318822370)
【分类号】：TU398.9

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