Steel structure component connection design method

practical design method is to conduct splicing connections according to strength conditions such as the net cross-sectional area of the connected flanges. In addition to calculating the shear force acting on the splicing position, the connection of the webs should also be based on the shear load-bearing capacity of the net cross-sectional area of the webs. The shear force is determined by dividing the sum of the bending moments at both ends of the member by the clear span length of the member.
The second accurate calculation design method is that the flange and web of the connected components share the bending moment at the section in proportion to their moment of inertia, and the shear force is all borne by the web.
The three commonly used simplified design methods are to conduct splicing design based on the component flange bearing all bending moments and the web bearing all shear forces.
The fourth-level strength design method is based on the strength conditions of the net cross-sectional area of the connected flanges or webs. The principles followed in the design of seismic joints, in addition to clear forces to reduce stress concentration and ease of processing and installation, the most important point is to meet the principle of strong connections with weak components to avoid overall damage to the structure due to weak connections. The purpose of the equal-strength connection design method is to make the bearing capacity of the component connection equal to or higher than the component bearing capacity. Therefore, the equal-strength connection design method is often used in the component splicing design of structures in seismic design or elastic-plastic design to ensure the continuity and good ductility of the components.
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