Studies on Global Seismic Damage Indices of High-rise Hybrid Structures

Abstract:

Based on the modal parameters of the structures, four damage states and the range of final softening index of each state are suggested in this paper firstly. Then, 9 hybrid structures with different structural characteristics are analyzed by structural analysis program CANNY for about 500 times subjected to different ground motions. So, the relationship of the maximum interstory drift and the main structural characteristics, as well as the final softening index is obtained. At the same time, the relationship between the maximum interstory drift and the maximum roof displacement over the height is also acquired. Based on the pushover analysis, a damage index of high-rise hybrid structures accounting for maximum deformation and cumulative damage is put forward. Finally, a case study is conducted on a high-rise hybrid structure model tested on the shaking table before, and verifies the quantities of damage indices suggested in the paper.