This article presents the most significant structural response parameters of a railway system analyzed with data gathered during 5 years. The structure is the instrumented curved portion of an elevated railroad that consists of a simply supported beam resting on cantilever columns on soft soil. A monitoring system was implemented to determine, within a few minutes, a preliminary structural state analyzing ambient vibration or seismic events. To assess the state of health of the structure, the response obtained from the seismic events, applying the proposed methodology, is compared with that obtained from controlled field tests conducted at the end of its construction and compared with design values. The monitoring system’s results showed minimal frequency variations caused by external works and a transitory variation of the fundamental frequencies during the 19 September 2017 great earthquake that, however, did not affect the structural integrity. The warning system showed acceptable performance, and only suggested checking the support beam-column condition.

中文翻译：

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高架铁路曲线部分的结构监测，包括 2017 年 9 月 19 日地震的影响

本文介绍了铁路系统最重要的结构响应参数，分析了 5 年期间收集的数据。该结构是高架铁路的仪表弯曲部分，由一个简单的支撑梁组成，梁搁在软土上的悬臂柱上。实施了监测系统以在几分钟内确定分析环境振动或地震事件的初步结构状态。为了评估结构的健康状态，应用建议的方法将从地震事件中获得的响应与在其建造结束时进行的受控现场测试中获得的响应进行比较，并与设计值进行比较。监测系统的结果显示，在 2017 年 9 月 19 日大地震期间，外部工程引起的频率变化很小，基频的短暂变化，但并未影响结构完整性。警告系统显示出可接受的性能，仅建议检查支撑梁柱条件。