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EFFECTIVE OPTIMAL STRUCTURAL CONTROL OF SOIL–STRUCTURE INTERACTION SYSTEMS
Author(s) -
SMITH H. ALLISON,
WU WENHWA
Publication year - 1997
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/(sici)1096-9845(199705)26:5<549::aid-eqe662>3.0.co;2-2
Subject(s) - soil structure interaction , structural system , control theory (sociology) , control (management) , optimal control , system identification , identification (biology) , engineering , control system , mathematical optimization , mathematics , computer science , structural engineering , finite element method , botany , software engineering , artificial intelligence , data modeling , biology , electrical engineering
A methodology is developed in this paper to include soil–structure interaction effects in optimal structural control, General Multi‐Degree‐Of‐Freedom (MDOF) structural models are considered. The SSI transfer functions for ground motion and control force in the physical space are presented first, followed by a methodology for using system identification techniques to find an equivalent fixed‐base model of an MDOF SSI system. An iterative technique is applied to combine these methods for the determination of optimal control gains. The control effectiveness of considering soil–structure interaction is investigated for the controlled SSI system. It is found that the control algorithm considering SSI effects is more effective than the corresponding control algorithm assuming a fixed‐base system model. In addition, the advantage of applying this methodology is observed to be more prominent in the cases where the SSI effects are more significant. © 1997 by John Wiley & Sons, Ltd.