第一作者谢文男，博士，讲师，1981年生

邮箱：xiewen@nbu.edu.cn

采用附加耗能构件的双柱式高墩地震损伤控制研究

谢文1，孙利民2

(1.宁波大学建筑工程与环境学院，浙江宁波315211； 2.同济大学土木工程防灾国家重点实验室，上海200092)

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。

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

基金项目：国家自然科学基金项目(91315301)；浙江省自然科学基金项目(LY15E080011)；浙江省教育厅科研项目(Y201430900)；宁波市自然科学基金项目(2015A610294)

收稿日期：2014-12-03修改稿收到日期：2015-04-09

中图分类号:U442.55; TU311.3

文献标志码：A

DOI:10.13465/j.cnki.jvs.2015.20.017

Abstract:A seismic damage control strategy, that is, adding energy dissipation elements, easily reparable or replaceable, between two columns, was presented. The control strategy was designed to dissipate seismic energy by the energy dissipation elements, while keeping the columns elastic or minor damaged. 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 extreme earthquake (PGA=1.0g) according to seismic damage indices, such as displacement, Park damage indices and curvature ductility factor. Compared with the twin-column tall piers without energy dissipation elements, the indices of the twin-column tall piers with energy dissipation elements after being damaged are significantly reduced, including the maximum displacement at the column top, the maximum curvature at the column bottom, the Park damage indices and the curvature ductility factor at the column. And the maximum moment of the column bottom of the twin-column pier with energy dissipation elements before and after being damaged can maintain almost unchanged. It is shown that the proposed strategy is effective and feasible to seismic damage control of the twin-column tall piers and the columns can keep safe even under extreme earthquake.

Seismic damage control for twin-column tall piers by using supplemental energy dissipation elements

XIEWen1,SUNLi-min2(1. Faculty of Architectural, Civil Engineering And Environment, Ningbo University, Ningbo 315211, China；2. State Key Laboratory for Disaster Reduction in Civil Engineering, Tongji University, Shanghai 200092, China)

Key words:twin-column tall pier; shear link; buckling restrained brace; damage control strategy; seismic damage index

双柱式高墩桥梁在我国铁路、公路建设中应用较广，尤其地震频发的西部地区。因高墩具有截面尺寸大、结构周期长、墩身质量大等特点，我国公路桥梁抗震设计规范对其抗震性能仅有原则性指导意见。而具有高延性能力桥梁(如桥墩)遭受强震后尽管不会发生倒塌，但会发生较大残余位移[1]，需高昂费用修复甚至重建。……