Response analysis of multidimensional seismic vibration considering rotational component to high-rise steel frame seismic isolation structure

Abstract

In order to study the influence of multi-dimensional seismic on the seismic isolation structure considering the rotational component, a high-rise steel frame structure model was established by finite element software, and the seismic isolation layer was set up in the base layer, the sixth layer, the eleventh layer and the sixteenth layer of the structure, forming four seismic isolation structures, and the dynamic response analysis of the multidimensional seismic on the structure considering the rotation component and only the translation component was completed. The results show that considering the coupling of different seismic rotation components and translational components compared with only translational seismic components, the structural response is increased, among which the structural response is the largest when the six components of seismic vibration act at the same time, the maximum acceleration of the top layer, the maximum horizontal displacement between layers, and the maximum column end shear force increase are 17%, 22%, and 36%, respectively, and the structural response is second when the seismic rocking component and the translational component are coupled, with an increase of 12%, 18%, and 29%, respectively. The structural response of the coupling of the torsional component of the seismic vibration and the translation component was the smallest, with an increase of 8%, 15%, and 20%, respectively. The sensitivity of the seismic isolation structure to the rotational component of the seismic vibration is less than that of the non-seismic isolation structure, and the lower the position of the seismic isolation layer, the weaker the sensitivity.