预应力连续箱梁桥的基准动力有限元模型研究z

林贤坤;张令弥;郭勤涛;张宇峰

振动与冲击 ›› 2009, Vol. 28 ›› Issue (11) : 38-42.

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PDF(2150 KB)
振动与冲击 ›› 2009, Vol. 28 ›› Issue (11) : 38-42.
论文

预应力连续箱梁桥的基准动力有限元模型研究z

  • 林贤坤1;张令弥2;郭勤涛2;张宇峰3

作者信息 +

Baseline Dynamic Finite Element Model of Prestressed ConcreteContinuous Box-Girders

  • Lin Xiankun1 Zhang Lingmi1 Guo Qintao2 Zhang Yufeng3
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文章历史 +

摘要

介绍了作为预应力混凝土连续梁桥的通扬运河特大桥的环境激励振动试验,并利用基
于频域空间域分解的运行模态分析法进行模态参数识别,得到大桥的动力特性测试结果(模态频率和振型)。建立了大桥的初始空间有限元模型,利用上述测试结果,基于遗传算法对模型进行了修正,获得能基本准确反映上述桥梁实际结构动力行为的基准有限元模型,它可用于大桥的健康检测、状态评估和损伤识别。

Abstract

Abstract :The paper describes the ¯eld ambient vibration testing on a prestressed concrete continuous box-girders, named Yongyang canal super bridge. The operational modal analysis (OMA) based on the frequency and spatial domain decomposition (FSDD) are used for the output-only data model identi¯cation, and the dynamic characteristics (natural frequencies and mode shapes) of above bridge are got. The full three-dimensional ¯nite element model of the above bridge is established and updated based on the above results using genetic algorithm. The baseline ¯nite element model
of the above bridge is got, which re°ects the bridge structural dynamicconditions and can serve as a baseline in the long-term health monitoring, condition evaluation and damage identi¯cation of the bridge in service.

关键词

预应力混凝土连续梁桥 / 环境激励振动试验 / 动力特性 / 模型修正 / 基准有限元模型

Key words

Prestressed Concrete Continuous Box-Girders / Field Ambient Vibration Testing / Dynamic Characteristics / Model Updating / Baseline Finite Element Model

引用本文

导出引用
林贤坤;张令弥;郭勤涛;张宇峰. 预应力连续箱梁桥的基准动力有限元模型研究z[J]. 振动与冲击, 2009, 28(11): 38-42
Lin Xiankun Zhang Lingmi Guo Qintao Zhang Yufeng. Baseline Dynamic Finite Element Model of Prestressed ConcreteContinuous Box-Girders[J]. Journal of Vibration and Shock, 2009, 28(11): 38-42

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