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Structural Engineering and Mechanics Volume 16, Number 1, July 2003 , pages 101-114 DOI: https://doi.org/10.12989/sem.2003.16.1.101 |
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Structure\' base design for earthquake protection numerical and experimental study |
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K. Alsaif and H. Kaplan
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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 pre-determined critical points within the frame of the structure is measured. Significant reduction of the dynamic stresses is obtained. | ||
| Key Words | ||
| earthquake protection; active isolation; transmitted force; dynamic stresses; spherical support. | ||
| Address | ||
| King Saud University, Riyadh, Saudi Arabia Department of Mechanical Engineering, University of Wisconsin-Madison, WI 53706, USA | ||