System identification applied to long‐span cable‐supported bridges using seismic records
System identification applied to long‐span cable‐supported bridges using seismic records
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DOI：
10.1002/eqe.758
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发表时间：
2008-03
影响因子：
4.5
通讯作者：
D. Siringoringo;Y. Fujino
中科院分区：
文献类型：
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作者：
D. Siringoringo;Y. Fujino
本文介绍了使用地震记录进行系统识别（SI）在大跨度缆索支撑桥梁中的应用。 SI 方法基于使用信息矩阵的系统实现 (SRIM)，该系统利用基础运动和桥梁加速度之间的相关性来识别状态空间模型的系数矩阵。使用基准斜拉桥的数值模拟证明了该方法在处理来自相对较短的地震记录的多输入多输出（MIMO）数据方面的优势。还研究了与传感器布置、测量噪声、输入包含以及输入类型对识别结果的影响相关的重要问题。该方法利用 2004 年中越新泻地震的记录来识别横滨湾大桥、彩虹大桥和鹤见航道大桥的模态参数。比较了模态参数与环境振动试验、强迫振动试验和分析模型的结果，并讨论了地震激励振幅对整体和局部结构模态的影响。版权所有 © 2007 约翰·威利父子有限公司
This paper presents the application of system identification (SI) to long‐span cable‐supported bridges using seismic records. The SI method is based on the System Realization using Information Matrix (SRIM) that utilizes correlations between base motions and bridge accelerations to identify coefficient matrices of a state‐space model. Numerical simulations using a benchmark cable‐stayed bridge demonstrate the advantages of this method in dealing with multiple‐input multiple‐output (MIMO) data from relatively short seismic records. Important issues related to the effects of sensor arrangement, measurement noise, input inclusion, and the types of input with respect to identification results are also investigated. The method is applied to identify modal parameters of the Yokohama Bay Bridge, Rainbow Bridge, and Tsurumi Fairway Bridge using the records from the 2004 Chuetsu‐Niigata earthquake. Comparison of modal parameters with the results of ambient vibration tests, forced vibration tests, and analytical models are presented together with discussions regarding the effects of earthquake excitation amplitude on global and local structural modes. Copyright © 2007 John Wiley & Sons, Ltd.