Development and research of beam-column connections with casting steel fasteners in steel frame

With the improvement of casting and material technology, cast steel joints are continuously used in practical engineering projects. Domestic and foreign scholars studied the performance of cast steel joints by experiment or the other methods and extended them to beam-column connections in steel frames. This paper mainly introduced the development of beam-column connection forms, the main problems in joint design, advantages and disadvantages of the joints with various forms, material properties and manufacturing process characteristics of cast steel, advantages of cast steel joints and fasteners, research status and achievements at home and abroad. The results show that compared with traditional connection forms, designers have full freedom to choose the shapes and the sizes, and this kind of steel joints has the best adaptability and changeability in different engineering practice, what's more, they have no problems with welding residual stress and stress concentration. Compared with cast steel joints, casting steel fasteners have more advantages such as flexible application, convenience of connections, small volume, low cost. In a word, casting steel fasteners have great research value and application potentials in connections of steel frames.