Structural Engineering and Mechanics

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Experimental analysis of a semi-actively controlled steel building

  • Occhiuzzi, Antonio (Department of Structural Analysis and Design, School of Engineering, University of Napoli Federico II) ;
  • Spizzuoco, Mariacristina (Department of Structural Analysis and Design, School of Engineering, University of Napoli Federico II)
  • Received : 2004.08.05
  • Accepted : 2005.02.07
  • Published : 2005.04.20
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Abstract

The strong need of verifying theories formulated for semi-active control through applications to real structures is due to the fact that theoretical research on semi-active control systems is not matched by a corresponding satisfactory experimental activity. This paper shows how a smart system including magnetorheological devices as damping elements can be implemented in a large-scale structural model, by describing in detail the kind of electronics (dedicated hardware and software) adopted during the experimental campaign. It also describes the most interesting results in terms of reduction of the seismic response (either experimental or numerical) of the semi-actively controlled structure compared to a passive operating control system, and in terms of the evaluation criteria proposed in the benchmark for seismically excited controlled buildings. The paper also explains how to derive from the classical theory of optimal control the adopted control logic, based on a clear physical approach, and provides an exhaustive picture of the time delays characterizing the control sequence.

Keywords

References

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