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

作　　者：LU Xiao YE LiePing LU XinZheng LI MengKe MA XiaoWei 

机构地区：[1]Department of Civil Engineering,Tsinghua University

出　　处：《Science China(Technological Sciences)》2013年第6期1525-1533,共9页中国科学（技术科学英文版）

基　　金：supported by "Twelfth Five-Year" plan major projects supported by National Science and Technology (Grant No.2011BAJ09B01);the National Nature Science Foundation of China (Grant Nos. 51222804, 51261120377);the Tsinghua University Initiative Scientific Research Program (Grant Nos. 2012THZ02-2, 2011THZ03) ;the Fok Ying Dong Education Foundation (Grant No. 131071)

摘　　要：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.

关 键 词：ground motion intensity measure super high-rise building time-history analysis collapse analysis 

分 类 号：TU973.31[建筑科学—结构工程]