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

作者：Lu Xiao; Ye LiePing; Lu XinZheng^*; Li MengKe; Ma XiaoWei

来源：Science China Technological Sciences, 2013, 56(6): 1525-1533.

DOI：10.1007/s11431-013-5234-1

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

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.

• 出版日期2013-6
• 单位清华大学