1. Rigid joints. Rigid joints are joints that ensure that the angle between the beam and the column remains unchanged or slightly deformed during the stress process of the steel structure. In order to ensure the performance of the structure to the utmost, it is necessary to ensure that the angle between the node and the beam-column structure of the structure does not change as far as possible when the force is applied, so that the structure of the building will remain stable. The connection strength of rigid joints is greater than the yield strength of the joints. Therefore, it is very important to control the stability and strength of the joints. After all the rigid joints are completed, the joint function of the structure can be effectively brought into play.
2. Articulated joints. Articulated joints are generally not used in the connection of steel structures, but in the fixing of beams, column bodies and column feet. When articulated joints are used to connect beams and columns, only the shear force in the vertical direction will produce no bending moment, and the articulated joints can rotate freely. The construction of articulated joints is simple and practical. In the construction, the end of the structure is fixed, which can enhance its stability, strengthen the bearing capacity of the end, and ensure the safety of the building.
3. Semi-rigid joints of steel structures. Semi-rigid joint is a kind of joint between rigid joint and articulated joint. It has a certain bending moment bearing force, but also can shape the shape of the structure. In addition, semi-rigid structure can also increase the seismic capacity and flexural capacity of the building, which is a connection between rigidity and flexibility. This kind of joint has strong flexural capacity and can maintain the bearing capacity of the structure. However, its construction is more difficult. Because the structure elasticity caused by improper construction and design is too large, it will affect the stability and safety of the structure, so its application is not very extensive.
In a word, the joint types of steel structure are the above three kinds, and it is not difficult to see that each type has its own advantages. Of course, different connection modes should be adopted according to different structures and different connection points in joint design, but no matter which way we choose, we should follow the correct operation steps in the operation, so as to better play out. The role of nodes.