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钢管混凝土外加强环式节点研究及应用综述
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Abstract:
钢管混凝土外加强环节点是指通过采用外加强环板将钢管混凝土柱与梁结合形成一个整体的连接部位，是确保结构安全性和耐久性的关键部位。本文首先对国内外关于钢管混凝土外加强环节点构造形式的研究进行了梳理和分析，加强环板与梁柱连接多采用焊接，随着装配式结构的普及，高强螺栓也逐渐被应用于加强环板与梁的连接中。通过进一步对比国内外钢管混凝土节点抗震性能的研究，总结发现此类节点表现出良好的工作和抗震性能，具有广泛的应用前景。最后对该类节点抗剪承载能力的计算公式进行了总结与分析，国内外已有相关规范提供了数学计算公式，但随着节点构造形式和加工材料的不断变化，现有公式可能存在一定的局限性。学术研究和工程实际均显示，钢管混凝土外加强环板具有较好的刚性、延性和抗震性能。因此，通过梳理和归纳现有的最新研究成果，为后续研究钢管混凝土外加强环节点的新型构造及其性能提供可靠的经验。
The Concrete-Filled Steel Tube (CFST) outer reinforced ring joints refer to the joint part of the CFST column and beam to form a whole through the use of outer reinforced ring plates, which is the key part to ensure the safety and durability of the structure. Firstly, in this paper, the research on the structural forms of Concrete-Filled Steel Tube (CFST) outer reinforced ring joints at home and abroad is analyzed. Welding is often used to strengthen the connection between ring plate and beam column. With the popularity of prefabricated structures, high-strength bolts are gradually applied to strengthen the connection between reinforced ring plate and beam. By further comparing the studies of seismic performance of concrete-filled steel tube joints at home and abroad, it is concluded that such joints show good working and seismic performance, and have a wide application prospect. Finally, the calculation formula of the shear-bearing capacity of this kind of node is summarized and analyzed. Relevant norms at home and abroad have provided mathematical calculation formulas, but with the constant change in the structural form of the joint and the processing material, the existing formulas may have some limitations. Academic research and engineering practice show that CFST outer reinforced ring plate has good rigidity, ductility and seismic performance. Therefore, by sorting out and summarizing the latest research results, the reliable experience is provided for the subsequent research on the new structures and properties of CFST outer reinforced ring joints.
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