%0 Journal Article
%T Performance of Mid-rise Buildings with Tubular Structure Under the Effect of Near Field Earthquakes
%J Journal of Structural Engineering and Geo-Techniques
%I Civil Engineering & Construction Research Center (CCRC), QIAU
%Z 2476-5465
%A Mazlooma, Hooman
%A Firoozi Nezamabadi, Maryam
%D 2017
%\ 03/30/2017
%V 7
%N 1
%P 1-13
%! Performance of Mid-rise Buildings with Tubular Structure Under the Effect of Near Field Earthquakes
%K Nonlinear Time History Analysis (NLTHA)
%K Two- and Three-Component Earthquake Accelerograms
%K Axial Forces of Side and Corner Columns
%K Shear Lag
%K Inter-Story Drifts
%R
%X The aim objective of this study is to investigate the effects of near-field earthquakes on the response of mid-rise buildings with tubular structure. For this purpose, a 20-story building with a square plan of six by six bays, all with 6 m span, and story height of 3.70 m is considered. Axial force of columns, shear lag, and inter-story drift values are used as the main response parameters. Nonlinear time history analyses (NLTHA) of the considered building were conducted by using once the two-component, and once more three-component accelerograms of both far- and near-field selected earthquakes for comparison. Numerical results of NLTHA show that inclusion of a vertical component of ground motion leads to around 17% and 32% increase, in average, in axial forces of side and corner columns respectively in case of far-field earthquakes. These increases were respectively 22% and 37% in case of near-field earthquakes. The vertical ground motion also leads to around 11% and 15% increase, in average, in shear lag of side and corner columns respectively in case of far-field earthquakes, and 13% and 19% increase in case of near-field earthquakes. The amount of increase in inter-story drift values due to the vertical ground motion was observed in range of 24% and 27% for far- and near-field earthquakes respectively.
%U http://www.qjseg.ir/article_828_1ebbff5298bdedc0dd16ae771b8dd177.pdf