Evaluation of shear force by combined of wind loads in a high-rise seismically isolated building with elastic sliding bearings

Abstract

In recent years, the number of super high-rise buildings adopting seismic isolation structures has increased. On the other hand, wind forces increase as buildings become taller, and the possibility that the seismic isolation layer will exceed its elastic limit and exhibit elasticplastic behavior increases. In addition, in current wind-resistant designs, a time history response analysis is required when the seismic isolation layer exhibits elastic-plastic behavior. However, this is impractical as it requires huge calculation processing. The Recommendation for Loads on Building (RLB) of AIJ allows for a simple calculation of wind response parameters without using time history analysis. The RLB also considers the simultaneity of wind forces and stipulates a method for combined of wind loads. However, there are few cases where the shearing force of a seismic isolation layer under combined loads has been evaluated. Therefore, in this study, we target a super high-rise seismically isolated building with elastic sliding bearings and evaluate the combined loads based on the RLB.