[1]唐盛华,周楠,方志,等.基于振型加权模态柔度的梁桥损伤识别方法[J].地震工程与工程振动,2017,01(6):098-106.[doi:10.13197/j.eeev.2017.06.98.tangsh.011]
 TANG Shenghua,ZHOU Nan,FANG Zhi,et al.Damage identification method for beam bridge based on mode shape weighted modal flexibility[J].EARTHQUAKE ENGINEERING AND ENGINEERING DYNAMICS,2017,01(6):098-106.[doi:10.13197/j.eeev.2017.06.98.tangsh.011]
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基于振型加权模态柔度的梁桥损伤识别方法
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《地震工程与工程振动》[ISSN:/CN:]

卷:
01
期数:
2017年6
页码:
098-106
栏目:
论文
出版日期:
2017-12-31

文章信息/Info

Title:
Damage identification method for beam bridge based on mode shape weighted modal flexibility
作者:
唐盛华1 周楠1 方志2 苏彬建1
1. 湘潭大学 土木工程与力学学院, 湘潭大学工程结构动力学与可靠性分析湖南省高等学校重点实验室, 湖南 湘潭 411105;
2. 湖南大学 土木工程学院, 湖南 长沙 410012
Author(s):
TANG Shenghua1 ZHOU Nan1 FANG Zhi2 SU Binjian1
1. College of Civil Engineering and Mechanics, Key Laboratory of Dynamics and Reliability of Structures, College of Hunan Province, Xiangtan University, Xiangtan 411105, China;
2. College of Civil Engineering, Hunan University, Changsha 410012, China
关键词:
损伤识别损伤程度梁桥柔度曲率振型
Keywords:
damage identificationdamage degreebeam bridgemodal flexibilitycurvaturemode shape
分类号:
O327;TU311.3
DOI:
10.13197/j.eeev.2017.06.98.tangsh.011
摘要:
为了采用结构柔度矩阵进行损伤识别,由均匀荷载面曲率差指标推导出一种加权柔度矩阵指标构造方法,权值分别取振型、振型曲率和、振型曲率符号函数构造出三个新的损伤指标。基于结构损伤前后指标的相对变化及节点损伤程度和单元损伤程度的关系,提出了指标的结构损伤程度计算方法。采用一简支梁和一三跨连续梁算例,考虑多种损伤情况,与均匀荷载面曲率差指标进行了对比分析,表明振型曲率符号函数加权损伤指标仅需前几阶模态便能进行损伤检测,具有良好的损伤定位能力,并能准确识别损伤程度。
Abstract:
In order to identify structural damage by using the flexibility matrix, a weighted flexibility matrix damage identification method was derived from the change in uniform load surface curvature (ULSC), three new indicators were constructed through using the mode shape, sum of mode shape curvature and sign function of mode shape curvature as the weight, respectively. Based on the relative changes of the indicator before and after structural damage and the relationship between nodal damage degree and elemental damage degree, the structural damage degree identification method was proposed. The simulation results of a simply supported beam and a three-span continuous beam were used to verify the new indicators in a variety of damage cases. Compared with the ULSC, it shows that the indicator weighted by sign function of mode shape curvature can effectively identify damage with only a few low order modal parameters. The new indicator has a good damage localization ability, furthermore, it can accurately identify the damage degree.

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备注/Memo

备注/Memo:
收稿日期:2017-01-10;改回日期:2017-04-17。
基金项目:国家自然科学基金项目(51508488);“工程结构动力学与可靠性分析湖南省高等学校重点实验室(湘潭大学)”开放课题资助项目
作者简介:唐盛华(1985-),男,讲师,博士,主要从事结构损伤识别研究.E-mail:tshtangshenghua@163.com
通讯作者:方志(1963-),男,教授,博士,主要从事桥梁结构和工程力学研究.E-mail:zackfang@163.com
更新日期/Last Update: 1900-01-01