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Based on the Shanghai Tower project, an actual super-tall building with a height of 632 m, the simplified modeling methods for the main components were discussed in detail and then the simplified 2-D nonlinear model was developed. The accuracy of the simplified model was validated by comparing the model, static and time-history analysis results of the refined finite element model. The validation indicates that the simplified model can represent the basic dynamic characteristics of the building and predicts the elastic and nonlinear seismic responses well. Taking the 22 pairs of ground motions suggested by FEMA P695 as the basic seismic input, the energy-dissipation contribution of different components and the distribution of the total energy-dissipation over the height under different seismic intensities were determined with the proposed simplified model. The results indicate that due to the significant contributions of high-order vibration modes, the total hysteretic energy distribution is mainly concentrated in the upper four zones of the building and that the outrigger is the major energy dissipation component. It will provide useful information for further development of optimum design for super-tall buildings. [ABSTRACT FROM AUTHOR]

Ground motion intensity measure (IM) , which is the bridge to connect the structural seismic responses and ground motion records, is an important part in performance-based earthquake design. Reasonable and efficient IM could make the prediction of the structural seismic response more accurate. Taking the super high-rise building as the research object, a more reasonable IM for super high-rise building was proposed. This IM takes into account the significant characteristic that higher-order vibration modes play important part in the seismic response of super high-rise building, as well as the simple form of the IM. And then, the key parameter of the proposed IM was calibrated by a series of time-history analysis and reasonable values were suggested. Finally, the collapse simulations of two super high-rise buildings were used to discuss the rationality of the proposed IM and some other existing IMs for super high-rise building. The results indicate that the proposed IM has the minimum coefficient of variation comparing to the other existing IMs at the critical collapse status and performances well in reflecting the contribution of higher-order vibration modes to the structural response, and it' s more applicable to seismic design for super high-rise building. [ABSTRACT FROM AUTHOR]