Engineering Mechanics ›› 2018, Vol. 35 ›› Issue (8): 21-29.doi: 10.6052/j.issn.1000-4750.2017.07.0531

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INTENSITY MEASURES FOR SEISMICALLY ISOLATED TALL BUILDINGS

YANG Can-tian1,2, XIE Lin-lin1,2, LI Ai-qun1,2,3, ZENG De-min1,2, LIU Li-de1,2   

  1. 1. Beijing advanced innovation center for future urban design, Beijing 100044, China;
    2. School of Civil and Transportation Engineering, Beijing University of Civil Engineering and Architecture, Beijing 100044, China;
    3. School of Civil Engineering, Southeast University, Nanjing 210096, China
  • Received:2017-07-09 Revised:2017-11-28 Online:2018-08-29 Published:2018-08-29

Abstract: Research on the seismic resilient structures has become a critical issue in earthquake engineering recently. The seismic isolation technology is an important method to achieve seismic resilience for tall buildings located in high seismic regions. Critical engineering demand parameters (EDPs), including maximum inter-story drift ratio (MIDR), maximum roof displacement (MRD), maximum floor acceleration (MFA) and maximum bearing displacement (MBD), are the essential indexes for the resilience assessment of seismically isolated tall buildings. To predict the abovementioned seismic responses and evaluate the seismic resilience of a seismically isolated tall building, an impartial intensity measure (IM) is required. Various factors, including the structural systems, structural heights, seismically isolated schemes, yield ratio of the isolation system and types of ground motions, are considered to yield impartial intensity measures for seismically isolated tall buildings based on 4 real engineering practices. The correlation between 25 IMs and the critical EDPs are evaluated. The IMs that has the best correlation with each EDP are identified. The IM which achieves the balance between the correlations with 4 EDPs is further identified. In addition, the influences of various factors are investigated. The research outcome will assist in providing a useful reference for resilience-based seismic design and evaluation methods of seismically isolated tall buildings.

Key words: seismically isolated tall building, intensity measures, engineering demand parameters, correlation, comprehensive balance

CLC Number: 

  • TU352.1+2
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