INCREMENTAL DYNAMIC ANALYSIS OF HIGH-RISE TOWERS

摘要

The performance study of high-rise towers has been attracting attention recently. Powerful analysis methods are nused to assess local and global behaviour of tall structures. Incremental Dynamic Analysis (IDA) is one the most npowerful methods for accurate estimation of seismic performance of structures.nIn this paper, IDA is applied on high-rise towers, specifi cally Tehran telecommunication tower. Three different nfi nite element models have been developed. The fi rst model is a two-dimensional fi bre beam element model non which IDA is applied. The other two models are fi nely meshed three-dimensional elastic and inelastic multi-naxial-element-based models, which are used to investigate the validity of the two-dimensional model. Further-nmore, the effi ciency of different Intensity Measures and Engineering Demand Parameters is investigated. nThe results show that there is a good agreement between the results of two-dimensional and three-dimensional nmodels in linear and nonlinear domains. It is also observed that Sa(T1) is more effi cient than peak ground nacceleration (PGA) as spectral acceleration is a structural specifi c intensity measure in comparison with, which nis site-specifi c. Copyright © 2009 John Wiley & Sons, Ltd.