Efficient modal analysis for structures with soil‐structure interaction | Zendy

Wu WenHwa | Zendy; Smith H. Allison | Zendy

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Efficient modal analysis for structures with soil‐structure interaction

Author(s) -

Wu WenHwa,

Smith H. Allison

Publication year - 1995

Publication title -

earthquake engineering and structural dynamics

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 2.218

H-Index - 127

eISSN - 1096-9845

pISSN - 0098-8847

DOI - 10.1002/eqe.4290240211

Subject(s) - modal , modal analysis , frequency domain , modal analysis using fem , soil structure interaction , vibration , superposition principle , normal mode , modal testing , structural engineering , mode (computer interface) , computer science , field (mathematics) , domain (mathematical analysis) , algorithm , engineering , finite element method , mathematics , acoustics , mathematical analysis , physics , materials science , polymer chemistry , pure mathematics , operating system

An efficient methodology is presented which uses modal analysis implemented in the frequency domain to obtain the structural response of a system with soil‐structure interaction. The interaction effects are represented using a free‐field ground motion modification factor, derived for each mode of vibration and used in the determination of structural response. Applying this algorithm, the advantages of the modal superposition method are fully exploited, and the interaction problem can be solved easily and effectively within the framework of the conventional frequency domain analysis for a fixed‐base structure. In addition, this method produces accurate approximation with less computational effort due to consideration of only the first few vibration modes of the structure.

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