Steel structures are now a common method used in many architectural designs. In traditional construction practices in our country, as they no longer meet people's needs, steel structures have begun to appear before us.
Compared to high-rise reinforced concrete structures, steel structures are generally softer, resulting in larger lateral displacement values under wind loads and seismic actions. If a building experiences significant swinging or twisting under gusts, it can greatly impact human comfort, often making it feel uncomfortable, and sometimes even intolerable. Studies have shown that humans are sensitive to wind-induced acceleration. To ensure a good working and living environment for high-rise steel structures under wind forces, it is necessary to limit the large accelerations parallel and perpendicular to the wind load direction.
When lateral deformation of a building exceeds due to wind loads or frequent earthquakes, it can lead to damage of architectural finishes and destruction of non-structural components. This can result in residual deformation in steel structural engineering components, and in the event of an extremely rare earthquake, significant effects can be caused by the deformation of the steel structure. Severe damage to non-structural components can also result in injuries. Excessively inclined buildings may cause residents to panic. In such cases, besides ensuring the structure does not collapse, measures must also be taken to limit large deformations.
It is evident that high-rise steel structural engineering buildings must have sufficient lateral stiffness in the presence of wind loads and seismic actions. This necessitates limiting the lateral displacement values during structural design. The lateral displacement limits are categorized into two types: overall relative displacement and inter-story relative displacement, with the latter being of greater importance.
