ABSTRACT
In recent years, in the seismic design of high-rise or super high-rise structures, in order to solve the problem that the lateral movement of some floors of the structure is too large and does not meet the standard limit, the horizontal reinforcing layer with high stiffness can be set in the appropriate position. In order to further understand the influence of reinforcing layers on the seismic performance of the frame core tube (referred to as frame-tube for short) structure, this paper takes the frame-core tube structure with 20 layers of reinforcing layers as the analysis object and uses YJK and ETABS to conduct modal analysis and response spectrum analysis under multiple earthquakes on the models with different positions and stiffness of reinforcing layers. The elastoplastic time-history analysis of the model without reinforcement layer and the model with reinforcement layer under rare earthquakes was performed using SAUSAGE to evaluate the seismic performance of the two models. The calculation results show that the basic period of ETABS is slightly less than that of YJK because the stiffness of reinforcement is considered in ETABS. In addition, when the stiffener is located at half the height of the floor, the translational stiffness and overturning moment of the structure are the largest, the inter-storey displacement Angle decreases the most, and the influence range and amplitude increase with the stiffener stiffness increasing.
