基于健康监测的高铁大型桥梁运营性能评定

发布时间：2018-06-20 02:39

本文选题：桥梁健康监测 + 高速铁路　；参考：《铁道工程学报》2017年01期

【摘要】：研究目的:桥梁健康监测技术不断发展,但基于健康监测的结构损伤识别、性能评定等尚存困难。针对大胜关长江大桥基于健康监测的性能评定问题,本文主要研究实用的基于健康监测数据的桥梁运营性能评定方法及其指标体系。研究结论:(1)基于大胜关长江大桥静动力特点,提出基于健康监测数据的直接评定、变化量评定以及综合评定方法;(2)应用加速度监测数据结果开展直接评定及变化量评定,实测最大时段峰值加速度-121.54 mm/s2均小于计算值、正常值及安全限值,两时段实测加速度极值变化量与方差的比值最大为0.628,表明桥梁振动并不显著且振动变化也小,并得到"优良"、"无损伤"的综合评判结论;(3)验证了评定指标体系的适用性以及大胜关长江大桥良好的运营安全性,可为类似桥梁性能评定提供参考。
[Abstract]:Objective: bridge health monitoring technology is developing, but it is difficult to identify and evaluate the structure damage based on health monitoring. Aiming at the performance evaluation of Dashengguan Yangtze River Bridge based on health monitoring, this paper mainly studies the practical evaluation method and index system of bridge operation performance based on health monitoring data. Conclusion: 1) based on the static and dynamic characteristics of Dashengguan Yangtze River Bridge, the direct assessment, variation evaluation and comprehensive evaluation method based on health monitoring data are put forward. The measured peak acceleration of -121.54 mm/s2 is less than the calculated value, normal value and safety limit value. The ratio of the maximum value of acceleration to variance is 0.628, which indicates that the vibration of the bridge is not significant and the change of vibration is small. The conclusion of "excellent" and "no damage" is obtained, which verifies the applicability of the evaluation index system and the good operation safety of the Dashengguan Yangtze River Bridge, which can be used as a reference for the performance evaluation of similar bridges.
【作者单位】：西南交通大学;中铁大桥勘测设计院集团有限公司;
【基金】：中国铁路总公司重大科研项目(2014G004-B)
【分类号】：U446

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