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INFLUENCE OF STIFFENING PLATE ON THE STATIC MECHANICAL BEHAVIOR OF SQUARE TUBE SHEAR-RESISTANT CONNECTOR
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摘要: 方管剪力键与H形钢肋的连接构造是组合空腹夹层板中一种新的构件连接形式。为研究方管剪力键与H形钢肋连接区域的受力性能，制作两个足尺剪力键试件开展对比试验研究，在试验基础上进一步做了有限元模拟分析。试验表明：在方管剪力键侧壁设置加劲板，能使整个剪力键受力具有明显的弹塑性受力特点；加劲板能明显缓解构件连接区域的应力集中现象，且加劲板对构件抗侧刚度具有较大的贡献。数值分析进一步表明，加劲板的宽度和厚度均对整个剪力键应力分布和抗侧刚度具有显著的影响，而改变宽度，影响效果更为显著。Abstract: The connection of square tube shear connector and H-shaped steel rib has been used in steel-concrete composite open-web sandwich plate recently. In order to study the mechanical properties of connection area, two full-scale specimens were manufactured to conduct contrast test and FEM analysis.The results showed that stiffening plate could make an obvious elastic-plastic behavior by seeting stiffening plate on the side wall of square tube shear connector. The stiffening plate could make a greater contribution to the tube's lateral stiffness and local stress concentration. Further finite element analysis showed that the width and thickness of stiffening plate, especially the plate width, had a significant effect on the stress distribution and lateral stiffness of shear connector.
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