Prototype and classification of steel structure connection objects

The structure construction of steel structure building includes two basic types: rod and cable. The resulting connection modes can be divided into the connection between cable and cable, the connection between rod and rod, and the connection between cable and rod. No matter the plane structure or the space structure, the complexity of the structural system will not lead to more types of connections due to the linear nature of the component monomer, and the complex connections can be regarded as the combination of these three basic types.

A. Cable to cable connection

The cable only bears the tension in the structural system, and the internal force is unchanged along the axis of the cable, and the section of the cable will not change because of the length change. Its connection features are as follows:

Connections at the ends must be made by means of a sheath. The connection in the middle of the cable can be made by various clamps. The connection of multiple cables requires the design of new nodes, according to the different ways of cable and cable combination and different: such as common single-layer or double-layer cable structure, according to the different layout can appear parallel or radiation forms. The net is lightweight and effective, catering to the popular pursuit of lightness and transparency. Steel structure of guangzhou design institute is located in shenzhen the plaza outside the glass roof, force structure by the upper and lower two sets of the network and become mutually, glass clip in the middle of the structure, and the level to the contact line to strengthen the stability and fixed on the concrete wall around, all nodes are cable - cable connection, light and transparent roof shows the advantage of the specific occasion.

B. Connection between rod and rod

Rods appear earlier than cables and are more widely used. Since rods can be both tensioned and compressed, the design of the connection between rods is more complex and variable than cables. There are two main factors that determine the design of the connection of the rods: the intersection Angle between the rods. The respective cross section form of the rod. The former is determined by the structural system, while the latter can be selected or combined in the connection design stage to facilitate the design of connection components.

When the intersection Angle is not vertical, the component section should be chosen carefully to reduce the difficulty of node design. In the beam-column connection of Guangzhou Sports Center, the round steel pipe string is abruptly cut off, and then welded to the I-shaped steel beam with several steel plates, the connection is very mechanical and stiff. In contrast, in the beam and column connection design on the roof of the Liaobu Sports Exhibition Hall of Dongguan Design Institute, on the one hand, the cable is chosen to avoid the non-vertical connection between the rods; On the other hand, the decomposition and circular variation of the square steel pipe column at the junction make the connection transition between it and the circular steel pipe beam natural and reasonable.