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Title: Seismic response of combined primary-secondary structures with the component-mode synthesis method
Authors: Kasinos, Stavros
Palmeri, Alessandro
Lombardo, Mariateresa
Keywords: Dynamic analysis
Modal analysis
Nonstructural components
Secondary substructures
Seismic engineering
Viscous damping
Issue Date: 2015
Publisher: © Civil-Comp Ltd
Citation: KASINOS, S., PALMERI, A. and LOMBARDO, M., 2015. Seismic response of combined primary-secondary Structures with the component-mode synthesis method. IN: Kruis, J., Tsompanakis, Y. and Topping, B.H.V. (eds). Proceedings of the Fifteenth International Conference on Civil, Structural and Environmental Engineering Computing, Prague, Czech Republic, 1st-4th September 2015. Civil-Comp Press, Stirlingshire, UK, paper 90, doi:10.4203/ccp.108.90
Series/Report no.: Civil-Comp Proceedings;108
Abstract: This paper deals with the dynamic analysis of primary-secondary combined systems. The problem of selecting the vibrational modes to be retained in analysis is first addressed, for the case of secondary substructures which may possess numerous lowfrequency modes with negligible mass, and a dynamic mode acceleration method (DyMAM) is adopted in view of the application for seismic analysis. The influence of various approaches to build the viscous damping matrix of the primary-secondary assembly is then investigated, and a novel technique based on modal damping superposition is proposed. The results of a parametric study for a representative staircase system multi-connected to a two-dimensional multi-storey frame reveal that the DyMAM correction is capable of increasing the response accuracy with a reduced number of modes compared to the classical MAM (modal acceleration method). Furthermore, a new technique is proposed for assembling the damping matrix, which is shown to be a convenient alternative for modelling the dissipative forces in composite systems. Indeed, while mass and stiffness matrices can unambiguously be defined, various assumptions can be made for the damping matrix, inducing considerable variation in the predicted seismic response.
Description: This is a conference paper. The final published version is available from: http://dx.doi.org/10.4203/ccp.108.90
Version: Accepted for publication
DOI: 10.4203/ccp.108.90
URI: https://dspace.lboro.ac.uk/2134/22776
Publisher Link: http://dx.doi.org/10.4203/ccp.108.90
ISSN: 1759-3433
Appears in Collections:Conference Papers (Civil and Building Engineering)

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