基于3A指标的斜拉桥上部结构状态评估

来源:用户上传      作者:秦劲东 方圣恩 张玮 黄学漾 郭新宇

　　摘 要：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。针对现存桥梁评估方法中计算复杂的问题，提出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。最后，用3A指标对斜拉桥进行评估，并将评估结果与五度指标进行比较分析，发现3A指标的评估结果与五度指标基本一致。
　　关键词：桥梁状态评估;3A指标;幅值偏移量;异常度;均值波动
　　中图分类号：U446.3 文献标志码：A 文章编号：2096-6717（2022）03-0071-08
　　收稿日期：2021-05-02
　　基金项目：国家自然科学基金（52178276）
　　作者简介：秦劲东（1995- ），男，主要从事桥梁健康监测研究，E-mail：jqqin001@163.com。
　　方圣恩（通信作者），男，教授，博士生导师，E-mail：shengen.fang@fzu.edu.cn。
　　Received：2021-05-02
　　Foundation item：National Natural Science Foundation of China （No. 52178276）
　　Author brief：QIN Jindong （1995- ）， main research interest： bridge health monitoring， E-mail： jqqin001@163.com.
　　FANG Shengen （corresponding author）， professor， doctorial supervisor， E-mail： shengen.fang@fzu.edu.cn.
　　Superstructure state evaluation of cable-stayed bridge using 3A indicators
　　QIN Jindong1a， FANG Shengen ， ZHANG Wei2， HUANG Xueyang2， GUO Xinyu1a
　　（1a. School of Civil Engineering; 1b. National & Local Joint Engineering Center for Seismic and Disaster and Informatization of Civil Engineering， Fuzhou University， Fuzhou 350108， P. R. China; 2. Fujian Academy of Building Research Co.， Ltd， Fuzhou 350108， P. R. China）
　　Abstract： To solve the problem of huge data and analysis paralysis in bridge state 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 termed 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 on-site evaluation. The 3A indicators are used to evaluate the safety condition of the cable-stayed bridge， and the results are compared with the five indices.The analysis results show that the superstructure state of the cable-stayed bridge evaluated by the 3A indicators is basically consistent with the five indices.
　　Keywords： bridge state assessment; 3A indicators;amplitude offset; abnormal degree; average value fluctuation
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