基于柔度曲率差的桥梁健康诊断方法

英文篇名：Damage evaluation of bridge structures based on flexibility curvature difference
中文刊名：河北建筑科技学院学报
英文刊名：Journal of Hebei Institute of Architectural Science and Technology
作者：魏翠玲 ; 林皋 ; 关文阁 ; 吴平川 ; 韩晓斌
英文作者：WEI Cui-ling ; LIN Gao ; GUAN Wen-ge ; WU Ping-chuan ; HAN Xiao-bin (Library of Hebei University of Engineering ; Handan 056038 ; China ; Dalian University of Technology ; Dalian 116024 ; China)
中文关键词：桥梁 ; 损伤识别 ; 柔度曲率差 ; 三次样条函数
英文关键词：bridge ; damage evaluation ; flexibility curvature difference ; three-spline function
出版日期：2004-12-30
机构：河北工程学院图书馆,大连理工大学,河北工程学院图书馆,河北工程学院图书馆,河北工程学院图书馆河北邯郸056038 ,辽宁大连116024 ,河北邯郸056038 ,河北邯郸056038 ,河北邯郸056038
年：2004
期：04
出版单位：河北建筑科技学院学报

摘要

本文在柔度矩阵基础上,用柔度曲率差为识别指标研究了桥梁结构多位置的健康诊断,并以几种梁式桥为例进行有限元仿真验证。结果表明,柔度曲率差具有良好的坐标指示能力,在损伤位置处,指纹有明显突变,损伤增大突变也相应增加,利用该方法进行梁式桥损伤识别可获得很好的识别精度,采用三次样条函数拟合柔度值的方法可有效解决解决噪声的干扰问题。
Based on the curvature difference of flexibility, multiple - position damage evaluation of bridge structures is presented. The effectiveness of the approach is verified by the numerical examples of bridge structures. This approach has the advantage that completeness of the modal parameters is not required, and only observation data of the lowest mode shape can give sufficiently accurate results. The higher the degree of damage, the larger curvature change takes place. The Three - spline function fitting technique is used to improve the accuracy of damage evaluation when noise increases to some extent.

引文

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