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논문 기본 정보

자료유형
학술저널
저자정보
Viti, Stefania (Department of Constructions, University of Florence) Cimellaro, Gian Paolo (Department of Civil, Structural & Environmental Engineering, University at Buffalo, The State University of New York) Reinhorn, Andrei M. (Department of Civil, Structural & Environmental Engineering, University at Buffalo, The State University of New York)
저널정보
테크노프레스 Smart structures and systems Smart structures and systems 제2권 제4호
발행연도
2006.1
수록면
339 - 355 (17page)

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A procedure to retrofit existing essential facilities subjected to seismic excitation is proposed. The main features of this procedure are to reduce maximum acceleration and associated forces in buildings subjected to seismic excitation by reducing their strength (weakening). The weakening retrofit, which is an opposite strategy to strengthening, is particularly suitable for buildings having overstressed components and foundation supports or having weak brittle components. However, by weakening the structure large deformations are expected. Supplementaldamping devices however can control the deformations within desirable limits. The structure retrofitted with this strategy will have, therefore, a reduction in the acceleration response and a reduction in the deformations, depending on the amount of additional damping introduced in the structure. An illustration of the above strategy is presented here through an evaluation of the inelastic response of the structure through a nonlinear dynamic analysis. The results are compared with different retrofit techniques. A parametric analysis has also been carried out to evaluate the effectiveness of the retrofitting method using different combination of the performance thresholds in accelerations and displacements through fragility analysis.

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