基于3A指标的斜拉桥上部结构状态评估
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作者:
作者单位:

1.福州大学 土木工程学院;2.福建省建筑科学研究院有限公司

作者简介:

通讯作者:

中图分类号:

TU375.4

基金项目:

国家自然科学基金面上项目(51578158)


Superstructure condition evaluation of a cable-stayed bridge using 3A indicators
Author:
Affiliation:

1.School of Civil Engineering,Fuzhou University;2.Fujian Academy of Building Research Co,Ltd

Fund Project:

National Natural Science Foundation of China

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    摘要:

    针对桥梁状态评估过程中数据量大,分析困难的问题,根据某斜拉桥的监测数据,采用五度指标评估方法,对其上部结构各部件进行分析。提出了一种基于权重系数的综合评价指标,用于评估斜拉桥上部结构的整体安全状态。同时,针对现存桥梁评估方法中计算复杂的问题,提出了3A指标,包括幅值偏移量、异常度和均值波动。相对于五度指标,新指标的计算更便捷,更方便工程人员进行现场评估。研究发现:采用3A指标评估方法后,斜拉桥上部结构状态的评估结果与五度指标基本一致。研究结果可为桥梁管养部门管理决策提供理论依据,为类似的大跨桥梁状态评估提供参考。

    Abstract:

    To solve the problem of huge data and analysis paralysis in bridge condition assessment, the five indices method is used to analyze the superstructure components of a cable-stayed bridge according to monitored data. Then, a comprehensive evaluation index incorporating weight coefficients is proposed to evaluate the safety condition of the cable-stayed bridge superstructure based on the existing five indices. After that, to overcome the calculation difficulty in bridge evaluation activities, a series of 3A indicators are proposed and individually named as the amplitude offset, the abnormal degree and the average value fluctuation. Compared with the previous five indices, the three new indicators require less computation, and thus, are more convenient for engineers to conduct in on-site evaluation. The analysis results show that the superstructure condition of the cable-stayed bridge evaluated by the 3A indicators is basically consistent with the five indices. The proposed indicators can provide theoretical judgment for bridge management agencies, and can also provide a reference for the condition evaluation of similar long-span bridges.

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历史
  • 收稿日期:2021-05-02
  • 最后修改日期:2021-07-14
  • 录用日期:2021-07-20
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