This chapter details the development of a smart base isolation system for seismic protection of civil structures utilising magnetorheological (MR) elastomer (MRE). Critical components of the development of the system, i.e. adaptive base isolator, control design and shake table testing, are described. Finally, shake table testing is conducted to verify the effectiveness of the proposed smart-base isolation system.

Chapter Contents:

• 14.1 Introduction
• 14.2 Smart base isolation concept
• 14.3 Adaptive base isolator
• 14.3.1 Structure
• 14.3.2 Finite element analysis
• 14.3.3 Characterisation testing
• 14.4 Nonlinear hysteresis modelling
• 14.4.1 Parametric models
• 14.4.2 Non-parametric model
• 14.5 Control algorithms
• 14.5.1 LQR control with GRNN inverse model
• 14.5.2 GA optimised fuzzy-logic control
• 14.6 Experimental setup
• 14.6.1 Three-storey building
• 14.6.2 Isolation system assembly
• 14.6.3 Data acquisition and control system
• 14.6.4 Earthquake excitation
• 14.7 Results and discussions
• 14.7.1 Time history
• 14.7.2 Peek floor acceleration
• 14.7.3 Control force and applied current
• Acknowledgements
• References

Inspec keywords: elastomers; earthquake engineering; control system synthesis; vibration isolation; magnetorheology

Other keywords: control design; seismic protection; magnetorheological elastomer; civil structures; smart base isolation system; adaptive base isolator; shake table testing; MRE

Subjects: Control system analysis and synthesis methods; Control applications in building and civil engineering; Mechanical variables control; Construction industry; Mechanical structures; Vibrations and shock waves (mechanical engineering); Engineering materials