[1]李立峰,黄佳梅,吴文朋,等.基于IDA的高墩大跨桥梁抗震性能评估[J].地震工程与工程振动,2012,(01):068-77.
 LI Lifeng,HUANG Jiamei,WU Wenpeng,et al.Research on the seismic performance of bridge with high piers and long spans using Incremental Dynamic Analysis[J].EARTHQUAKE ENGINEERING AND ENGINEERING DYNAMICS,2012,(01):068-77.
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基于IDA的高墩大跨桥梁抗震性能评估
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《地震工程与工程振动》[ISSN:/CN:]

卷:
期数:
2012年01期
页码:
068-77
栏目:
出版日期:
2012-02-28

文章信息/Info

Title:
Research on the seismic performance of bridge with high piers and long spans using Incremental Dynamic Analysis
作者:
李立峰 黄佳梅 吴文朋 王连华
湖南大学 土木工程学院, 湖南 长沙 410082
Author(s):
LI Lifeng HUANG Jiamei WU Wenpeng WANG Lianhua
College of Civil Engineering, Hunan University, Changsha 410082, China
关键词:
高墩大跨桥梁增量动力分析性能评估曲率分布目标位移
Keywords:
bridge with high piers and long spansIncremental Dynamic Analysisperformance evolutioncurvature distributiontarget displacement
分类号:
U448.1;U442.5+5;U212.35
摘要:
高墩桥梁的地震响应与传统的中低墩桥梁有很大差别,我国现行桥梁抗震规范对此没有规定。为了合理评估高墩大跨桥梁的抗震性能,以一座连续刚构桥为研究对象,采用OpenSees建立弹塑性有限元动力分析模型,从PEER地震数据库中选取了15条地震记录进行增量动力分析(Incremental dynamic analysis, IDA),利用Ramberg-Osgood函数对控制参数进行统计,从而得到了结构概率分位值为10%、50%和90%的IDA曲线,结合定义的损伤状态对结构的抗震性能进行了评估;根据墩身最大曲率分布得到了塑性区域长度,提出了根据最大曲率分布估算墩顶目标位移的方法。结果表明:利用R-O函数统计得到的IDA概率分位曲线能很好地体现桥梁抗震性能,并能给出满足相应性能水准的可靠等级。在强震作用下,高墩结构塑性区域长度与各国规范计算结果吻合,按墩身最大曲率分布估算墩顶位移与IDA分析结果吻合较好,弥补了规范的不足。
Abstract:
The seismic responses of bridge with high piers,for which the seismic design criteria are unavailable,are quite different from the regular bridge. In order to assess the seismic performance of the irregular bridges with high piers and long spans,a continuous rigid frame bridge is taken as an example. Using OpenSees, a dynamic elastic-plastic finite element model is built,and then the Incremental Dynamic Analysis is carried out with 15 seismic ground motions selected from the PEER database. With the Ramberg-Osgood equation, a statistical analysis of the controlling parameters is performed, and then by ascertaining the 10%, 50%, 90% IDA responses and combining with the defined damage to the structure, the seismic performance is accessed.According to the distribution for maximum curvature along the piers, the length of the plastic zone and the formulas for estimating the beam displacement based on the curvature are proposed. The results show that IDA fractile curves can well measure the seismic performance, and can evaluate the reliability at the corresponding performance level; besides,under the strong ground motion, the length of the plastic zone is consistent with the criteria at home and abroad and the formulas for estimating the beam displacement meet the IDA analysis results well.

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备注/Memo

备注/Memo:
收稿日期:2011-09-05;改回日期:2011-10-19。
基金项目:国家自然科学基金重点项目(11032004);"中央高校基本科研业务费"资助(531107040392);湖南省科技计划(2011FJ3242)
作者简介:李立峰(1971-),男,教授,博士,主要研究方向为桥梁抗震、正交异性钢箱梁受力性能研究.E-mail: lilifeng@hnu.edu.cn
更新日期/Last Update: 1900-01-01