Long term structural health monitoring for old deteriorated bridges: a copula-ARMA approach
Long term structural health monitoring for old deteriorated bridges: a copula-ARMA approach
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老旧桥梁的长期结构健康监测：copula-ARMA 方法
DOI：
10.12989/sss.2020.25.3.285
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发表时间：
2020-03
影响因子：
3.5
通讯作者：
Zhenhao Zhang
中科院分区：
文献类型：
--
作者：
Yi Zhang;Chul-Woo Kim;Lian Zhang;Yongtao Bai;Hao Yang;Xiangyang Xu;Zhenhao Zhang
近年来，由于基础设施老化的规模和严重程度，长期结构健康监测受到了土木工程师的广泛关注。建立有效的损伤指标，提出改进的监测方法，对工程实践具有重要意义。在桥梁健康监测中，长期结构振动测量被认为是非常有用的，并被用于维修工程的规划。以往的研究主要集中在测量的线性时间序列模型上，没有考虑到测量之间的非线性依赖关系。本文提出了一种基于长期振动测量的桥梁健康监测新方法。首次将基本ARMA模型与copula理论相结合用于桥梁结构损伤检测。这一概念在日本的实际工程实践中得到了应用。分析比较了在不同窗口尺寸下基于copula的损伤指标的效率和精度。基于结构完好状态和损伤状态之间的损伤检出率，讨论了基于copula指标的性能。
Long term structural health monitoring has gained wide attention among civil engineers in recent years due to the scale and severity of infrastructure deterioration. Establishing effective damage indicators and proposing enhanced monitoring methods are of great interests to the engineering practices. In the case of bridge health monitoring, long term structural vibration measurement has been acknowledged to be quite useful and utilized in the planning of maintenance works. Previous researches are majorly concentrated on linear time series models for the measurement, whereas nonlinear dependences among the measurement are not carefully considered. In this paper, a new bridge health monitoring method is proposed based on the use of long term vibration measurement. A combination of the fundamental ARMA model and copula theory is investigated for the first time in detecting bridge structural damages. The concept is applied to a real engineering practice in Japan. The efficiency and accuracy of the copula based damage indicator is analyzed and compared in different window sizes. The performance of the copula based indicator is discussed based on the damage detection rate between the intact structural condition and the damaged structural condition.