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An improved ground motion intensity measure for super high-rise buildings

Abstract

Ground motion intensity measure (IM) is an important part in performance-based seismic design. A reasonable and efficient IM can make the prediction of the structural seismic responses more accurate. Therefore, a more reasonable IM for super high-rise buildings is proposed in this paper. This IM takes into account the significant characteristic that higher-order vibration modes play important roles in the seismic response of super high-rise buildings, as well as the advantages of some existing IMs. The key parameter of the proposed IM is calibrated using a series of time-history analyses. The collapse simulations of two super high-rise buildings are used to discuss the suitability of the proposed IM and some other existing IMs. The results indicate that the proposed IM yields a smaller coefficient of variation for the critical collapse status than other existing IMs and performs well in reflecting the contribution of higher-order vibration modes to the structural response. Hence, the proposed IM is more applicable to seismic design for super high-rise buildings than other IMs.

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Correspondence to XinZheng Lu.

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Lu, X., Ye, L., Lu, X. et al. An improved ground motion intensity measure for super high-rise buildings. Sci. China Technol. Sci. 56, 1525–1533 (2013). https://doi.org/10.1007/s11431-013-5234-1

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  • DOI: https://doi.org/10.1007/s11431-013-5234-1

Keywords

  • ground motion intensity measure
  • super high-rise building
  • time-history analysis
  • collapse analysis