Science China Technological Sciences

, Volume 56, Issue 6, pp 1525–1533 | Cite as

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

  • Xiao Lu
  • LiePing Ye
  • XinZheng Lu
  • MengKe Li
  • XiaoWei Ma
Article

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.

Keywords

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

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Copyright information

© Science China Press and Springer-Verlag Berlin Heidelberg 2013

Authors and Affiliations

  • Xiao Lu
    • 1
  • LiePing Ye
    • 1
  • XinZheng Lu
    • 1
  • MengKe Li
    • 1
  • XiaoWei Ma
    • 1
  1. 1.Department of Civil EngineeringTsinghua UniversityBeijingChina

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