Structural Engineering and Mechanics

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Structure's base design for earthquake protection numerical and experimental study

  • Alsaif, K. (King Saud University) ;
  • Kaplan, H. (Department of Mechanical Engineering, University of Wisconsin-Madison)
  • Received : 2001.02.26
  • Accepted : 2003.02.06
  • Published : 2003.07.25
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Abstract

A base isolation system is proposed for earthquake protection of structures. The system incorporates spherical supports for the base, a specially designed spring-cam system to keep the base rigidly supported under normal condition and to allow it to move for the duration of the earthquake under the constraint of a spring with optimized non-linear characteristics. A single-story model is constructed to investigate the feasibility of the concept. Numerical simulations of the system as well as experimental results show that 95% reduction of the transmitted force to the structure can be achieved. To demonstrate the effectiveness of this isolation mechanism, the maximum dynamic bending stress developed at predetermined critical points within the frame of the structure is measured. Significant reduction of the dynamic stresses is obtained.

Keywords

References

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