采用附加耗能构件的双柱式高墩地震损伤控制研究

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振动与冲击 ›› 2015, Vol. 34 ›› Issue (20) : 98-103.

论文

谢文1，孙利民2?

作者信息 +

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

XIE Wen1，SUN Li-min2

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摘要

提出在墩柱间附加耗能构件的地震损伤控制策略，耗散地震输入确保墩柱处于弹性或只发生轻微损伤，且震后易于修复或更换。利用弹塑性动力方法并引入位移、Park损伤指数及曲率延性系数作为评价指标，研究附加耗能构件对极端地震（PGA=1.0 g）作用下双柱式高墩的地震损伤控制效果，探讨、验证该控制策略的有效性及可行性。结果表明，损伤控制（附加耗能构件）的双柱式高墩墩顶位移及墩底曲率、Park损伤指数及曲率延性系数明显低于控制前，且墩底截面弯矩变化较小；附加耗能构件对双柱式高墩的损伤控制效果明显，满足损伤控制目标。

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.

关键词

双柱式高墩 / 剪切连梁 / 约束屈曲支撑 / 损伤控制策略 / 地震损伤指标

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谢文1，孙利民2?. 采用附加耗能构件的双柱式高墩地震损伤控制研究[J]. 振动与冲击, 2015, 34(20): 98-103

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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