Minimizing noise effect in curvature-based damage detection
Minimizing noise effect in curvature-based damage detection
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DOI：
10.1007/s13349-016-0163-x
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发表时间：
2016-03
影响因子：
4.4
通讯作者：
Zhen Sun;T. Nagayama;Y. Fujino
中科院分区：
文献类型：
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作者：
Zhen Sun;T. Nagayama;Y. Fujino
损伤检测是桥梁使用性能和安全性状态评估的基础。基于桥梁静力和动力响应的损伤识别方法有很多，其中基于曲率的损伤识别方法因其能够准确检测损伤位置而受到越来越多的关注。虽然对该方法的研究很多，但很少考虑测量噪声的影响和减小噪声影响的方法。本文研究了基于曲率的损伤检测中测量噪声的影响。提出了一种将噪声影响最小化的方法，以便于实际应用于实际情况。为了验证该方法的可靠性和有效性，对一根梁试件进行了室内试验，并利用所测得的位移来识别损伤。为了说明该方法对实际桥梁的适用性，将该方法应用于考虑测量噪声影响的详细有限元桥梁模型。结果表明，该方法在梁桥实际应用中是可行的。
Damage detection is essential for condition assessment of serviceability and safety of bridges. Different methods have been developed for damage detection based on static or dynamic response of bridges, among which curvature-based method attracted more and more attention as it shed light on accurate detection of damage location. Although there are many investigations contributed to this method, few of them considered the effect of measurement noise and approaches to minimize noise effect. In this paper, effect of measurement noise is investigated in the curvature-based damage detection. An approach is proposed to minimize noise effect for practical application on realistic cases. To verify its reliability and efficacy, laboratory experiment is conducted on a beam specimen, and the measured displacement is used to identify damage with the proposed approach. To illustrate the applicability for realistic bridges, this method was applied to a detailed Finite Element bridge model which also considers effects of measurement noise. The results indicate the feasibility of this method in practical application on girder bridges.