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Seismic response of acceleration-sensitive non-structural components mounted on irregular multi-storey reinforced concrete buildings

Aldeka, Ayad Basheer (2015)
Ph.D. thesis, University of Birmingham.

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Abstract

This research investigates the seismic responses of lightweight acceleration-sensitive non-structural components (NSCs) integrated on irregular multi-storey reinforced concrete (RC) structures designed on different ground types. Dynamic nonlinear finite element analyses of the primary-secondary systems were conducted to provide insight into the seismic response of the NSCs and to evaluate the accuracy of Eurocode 8 (EC8) predictions when the NSCs are attached to the flexible sides along the heights of the primary structures (P-structures). Various sets of natural and artificial earthquake records consisting of 70 accelerograms were utilised. The effects of the plan and vertical mass irregularities were investigated. The NSCs were modelled as vertical cantilevers fixed at their bases with masses on the free ends and varying lengths so as to match the frequencies of the P-structures. A full dynamic interaction is considered between the NSCs and P-structures. The results suggest that the recommendation of the EC8 underestimates the NSCs’ accelerations at the flexible sides of irregular RC P-structures when the NSCs’ periods match those of the P-structures. Consequently, a modification on the existing EC8 design equation is made for the calculation of the maximum acceleration amplification factors of the NSCs taking into account the effects of both the torsion and the maximum seismic capacity of the P-structure.

Type of Work:Ph.D. thesis.
Supervisor(s):Dirar, Samir (Dr) and Martinez-Vazquez, Pedro (Dr)
School/Faculty:Colleges (2008 onwards) > College of Engineering & Physical Sciences
Department:School of Civil Engineering
Subjects:TA Engineering (General). Civil engineering (General)
Institution:University of Birmingham
ID Code:5858
This unpublished thesis/dissertation is copyright of the author and/or third parties. The intellectual property rights of the author or third parties in respect of this work are as defined by The Copyright Designs and Patents Act 1988 or as modified by any successor legislation. Any use made of information contained in this thesis/dissertation must be in accordance with that legislation and must be properly acknowledged. Further distribution or reproduction in any format is prohibited without the permission of the copyright holder.
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