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S. Kasinos, A. Palmeri, M. Lombardo, "Seismic Response of Combined Primary-Secondary Structures with the Component-Mode Synthesis Method", in J. Kruis, Y. Tsompanakis, B.H.V. Topping, (Editors), "Proceedings of the Fifteenth International Conference on Civil, Structural and Environmental Engineering Computing", Civil-Comp Press, Stirlingshire, UK, Paper 90, 2015. doi:10.4203/ccp.108.90

Keywords: dynamic analysis, modal analysis, nonstructural components, secondary substructures, seismic engineering, viscous damping.

Summary

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 low-frequency 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 for constructing 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. Furthermore, the technique proposed for assembling the damping matrix 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.

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Front Page Browse CCP CSETS CTR IJRT Other Authors Search Purchase Guide FAQ Contact us	Civil-Comp Proceedings ISSN 1759-3433 CCP: 108 PROCEEDINGS OF THE FIFTEENTH INTERNATIONAL CONFERENCE ON CIVIL, STRUCTURAL AND ENVIRONMENTAL ENGINEERING COMPUTING Edited by: J. Kruis, Y. Tsompanakis and B.H.V. Topping Paper 90 Seismic Response of Combined Primary-Secondary Structures with the Component-Mode Synthesis Method S. Kasinos, A. Palmeri and M. Lombardo School of Civil and Building Engineering, Loughborough University, United Kingdom doi:10.4203/ccp.108.90 purchase the full-text of this paper Full Bibliographic Reference for this paper S. Kasinos, A. Palmeri, M. Lombardo, "Seismic Response of Combined Primary-Secondary Structures with the Component-Mode Synthesis Method", in J. Kruis, Y. Tsompanakis, B.H.V. Topping, (Editors), "Proceedings of the Fifteenth International Conference on Civil, Structural and Environmental Engineering Computing", Civil-Comp Press, Stirlingshire, UK, Paper 90, 2015. doi:10.4203/ccp.108.90 Keywords: dynamic analysis, modal analysis, nonstructural components, secondary substructures, seismic engineering, viscous damping. Summary 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 low-frequency 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 for constructing 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. Furthermore, the technique proposed for assembling the damping matrix 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. purchase the full-text of this paper (price £20) go to the previous paper go to the next paper return to the table of contents return to the book description purchase this book (price £75 +P&P)
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