基于模态指标与数据融合的钢管混凝土拱桥损伤识别

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振动与冲击 ›› 2009, Vol. 28 ›› Issue (12) : 91-95.

论文

基于模态指标与数据融合的钢管混凝土拱桥损伤识别

姜绍飞1;胡春明2

作者信息 +

Structural damage identification based on modal indices and data fusion for an arch bridge of concrete-filled steel tube

Jiang Shao-Fei1;Hu Chun-Ming2

Author information +

文章历史 +

摘要

为了提高大型结构的损伤诊断率，本文提出了一种基于模态指标和数据融合的结构损伤识别方法.根据结构振动响应，首先利用多种模态损伤指标，对钢管混凝土拱桥的损伤位置进行初步诊断，然后利用文中提出的加权平均法，对多种模态损伤指标进行融合计算，最后根据峰值方法得到拱桥的损伤位置。为了验证所提方法的可行性和有效性，对一双跨下承式钢管混凝土拱桥进行了单损伤和多损伤模拟，同时考虑了噪声等环境因素对识别结果的影响，并与单一损伤指标识别结果进行了比较。结果表明，本文所提出的损伤识别方法能够对钢管混凝土拱桥的损伤进行定位，它明显优于单一损伤指标的识别结果。

Abstract

In order to improve the diagnosis rate，a structural damage identification method based on modal indices and data fusion was proposed in this paper. In this method, multi-damage indices are used to initially diagnose damage on basis of structural vibration response. Then the weighted-average algorithm is used to fuze the multi-damage indices, and thus the fusion decision-making and damage location are made based on the peak value method. To verify the feasibility and efficiency, both single- and multi-damage patterns were simulated to identify for a two-span arch bridge of concrete-filled steel tube, and the effect of noise on identification accuracy was also taken into account. A comparison was made among the fusion method and single damage index. The results show that the proposed method can not only locate both sinle- and multi-damage patterns, but also excel single damage indices.

导出引用

姜绍飞;胡春明. 基于模态指标与数据融合的钢管混凝土拱桥损伤识别[J]. 振动与冲击, 2009, 28(12): 91-95

Jiang Shao-Fei;Hu Chun-Ming. Structural damage identification based on modal indices and data fusion for an arch bridge of concrete-filled steel tube[J]. Journal of Vibration and Shock, 2009, 28(12): 91-95

中图分类号： TP274