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Title: | A macro-element based practical model for seismic analysis of steel-concrete composite high-rise buildings |
Authors: | Zhou, X Li, G |
Keywords: | Steel-concrete composite structure;High-rise building;Hybrid structure;Seismic design;Macro-element;Half-frame model;Multiple-spring wall element;Time-history analysis |
Issue Date: | 2013 |
Publisher: | Elsevier |
Citation: | Engineering Structures, 49, 91 - 103, 2013 |
Abstract: | Seismic behaviour of steel–concrete composite high-rise buildings, composed of external steel frames (SFs) and internal concrete tube (CT), with rectangular plan is investigated in this paper. A macro-element based model is established for seismic analysis of composite high-rise buildings aiming at predicting their global responses under earthquakes. By employing this macro-element based model, natural frequencies and vibration modes, storey and inter-storey drifts, overturning moments and storey shear forces of composite structures, induced by earthquakes, are able to be obtained with much less computation time and cost compared with using micro-element based analytical models. To validate its efficiency and reliability, the macro-element based model is employed to analyse a 1/20 scaled-down model of a 25-storey steel–concrete composite high-rise building subjected to simulated earthquakes with various intensities through a shaking table. Natural frequencies and storey drifts of the model structure are obtained from numerical analyses and compared with those from shaking table test results. It has been found that the calculated dynamic responses of the composite model structure subjected to minor, basic, major and super strong earthquakes agree reasonably well with those obtained from experiments, suggesting that the proposed macro-element based model is appropriate for inelastic time-history analyse for global responses of steel–concrete composite high-rise structures subjected to earthquakes with satisfactory precision and reliability. This research thus provides a practical model for elastic and inelastic deformation check of high-rise composite buildings under earthquakes. |
Description: | This is the post-print version of the final paper published in Engineering Structures. The published article is available from the link below. Changes resulting from the publishing process, such as peer review, editing, corrections, structural formatting, and other quality control mechanisms may not be reflected in this document. Changes may have been made to this work since it was submitted for publication. Copyright @ 2012 Elsevier B.V. |
URI: | http://www.sciencedirect.com/science/article/pii/S0141029612005585 http://bura.brunel.ac.uk/handle/2438/9076 |
DOI: | http://dx.doi.org/10.1016/j.engstruct.2012.11.002 |
ISSN: | 0141-0296 |
Appears in Collections: | Civil Engineering Dept of Mechanical and Aerospace Engineering Research Papers |
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