A study of different types of connections to structural-steel square tubings

Although square tubular element has long been recognized as an ideal structural member, its acceptance was limited by the lack of detailed knowledge on suitable connections related to this geometric shape. It is structurally inefficient to use a strong column poorly connected to a strong beam. So it is necessary to understand, in advance of adoption, the effect and behavior of different types of connections and to develop an efficient structural system. In this study, the ordinary column-to-beam framing with different types of connections has been investigated. The three types of connections are single-plate connection, double-angle connection, and multi-angle connection. Six specimens were prepared, instrumented and tested during this study. The research covers only the important factors affecting the design of a connection, such as the rotation and deflection of the beam end, the moment-rotation and deformation of the connection, and stress distribution and stress concentration on the column wall --Abstract, page i