基于动力指纹识别桥梁损伤检测方法研究  

Research on Bridge Damage Detection Method Based on Dynamic Fingerprint Recognition

作　　者：刘德安 刘屺阳 包琦 耿江玮 郝岩 李一鸣 张军 王明宏 LIU Dean;LIU Qiyang;BAO Qi;GENG Jiangwei;HAO Yan;LI Yiming;ZHANG Jun;WANG Minghong(Gansu Provincial Transportation Research Institute Group Co.,Ltd.;Gansu Provincial Center of Technology Innovation for Health Monitoring and Security Assessment in Bridge and Tunnel;Innovative Service Platform for Highway Test and Testing;Jiuquan Vocational and Technical College)

机构地区：[1]甘肃省交通科学研究院集团有限公司 [2]甘肃省桥梁隧道健康监测与安全评估技术创新中心 [3]甘肃省公路试验检测创新服务平台 [4]酒泉职业技术学院

出　　处：《广东建材》2024年第6期49-54,共6页Guangdong Building Materials

基　　金：甘肃省公路交通建设集团有限公司科技项目(2022-ZH-061).

摘　　要：桥梁作为交通网格的关键组成的部分,其结构安全性能日益受到关注。桥梁损伤检测是确保桥梁安全运营的关键环节。然而,长期运营过程中易受多种因素影响而出现结构损伤,及时准确地识别这些损伤对于保障桥梁安全运营至关重要。本文通过对动力指纹原理、频率、振型及曲率模态进行分析,旨在单损简支箱梁振型变化值与损伤程度无关,与梁的损伤位置有关,且对应损伤单元处有突变,识别桥梁损伤位置;而受损梁曲率模态分析,在1/2跨中单元(15#、16#)损伤的位置第一阶曲率模态曲线各有一段平台。As the key component of traffic grid,bridge structure safety performance has been paid more and more attention.Bridge damage detection is the key link to ensure the safe operation of Bridges.However,structural damage is easily affected by many factors during long-term operation,and timely and accurate identification of these damages is crucial to ensure the safe operation of Bridges.By analyzing the principle of dynamic fingerprint,frequency,vibration mode and curvature mode,this paper aims to identify the damage location of a single loss simply supported box beam,not related to the damage degree but to the damage location of the beam,and the corresponding damage unit has a sudden change.In the curvature mode analysis of the damaged beam,there is a platform in the first order curvature mode curve at the position of the damaged element(15#,16#)in 1/2 span.

关 键 词：桥梁损伤检测 动力指纹识别 模态分析 损伤定位 无损检测 

分 类 号：TP274[自动化与计算机技术—检测技术与自动化装置] U446[自动化与计算机技术—控制科学与工程]