Investigation on seismic damage control for twin-column tall piers by supplemental energy dissipation elements

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Journal of Vibration and Shock ›› 2015, Vol. 34 ›› Issue (20) : 98-103.

XIE Wen1，SUN Li-min2

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Abstract

A seismic damage control strategy, adding energy dissipation elements with easily repairable or replaceable to between two columns, is presented in this paper. The control strategy is designed to dissipate seismic energy by the energy dissipation elements, while to keep the columns elastic or minor damage. In order to study the effectiveness of the energy dissipation elements on seismic damage control of twin-column tall piers, elasto-plastic time history analyses were performed on models of the twin-column tall pier with the height of 60 m under extremely earthquake (PGA=1.0g) according to seismic damage indices, such as displacement, Park damage indices and curvature ductility factor. Comparison with the twin-column tall pier, the twin-column tall piers with energy dissipation elements demands were significantly reduced, including the maximum displacement of the column top and the maximum curvature of the column bottom as well as the Park damage indices and the curvature ductility factor of the column. And the maximum moment of the column bottom of the twin-column pier with energy dissipation elements is almost equal to those of the twin-column pier. It was shown that the proposed strategy with energy dissipation elements is effective and feasible to seismic damage control of the twin-column tall pier and the damage control objectives of the columns can be satisfied under extremely earthquake.

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XIE Wen1，SUN Li-min2. Investigation on seismic damage control for twin-column tall piers by supplemental energy dissipation elements[J]. Journal of Vibration and Shock, 2015, 34(20): 98-103

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