# [1]牛杰,王龙花,宗周红,等.考虑比例阻尼影响的梁式结构损伤识别方法[J].东南大学学报(自然科学版),2018,48(3):496-505.[doi:10.3969/j.issn.1001-0505.2018.03.018] 　Niu Jie,Wang Longhua,Zong Zhouhong,et al.Damage identification method of beam type structures considering proportional damping[J].Journal of Southeast University (Natural Science Edition),2018,48(3):496-505.[doi:10.3969/j.issn.1001-0505.2018.03.018] 点击复制 考虑比例阻尼影响的梁式结构损伤识别方法() 分享到： var jiathis_config = { data_track_clickback: true };

48

2018年第3期

496-505

2018-05-20

## 文章信息/Info

Title:
Damage identification method of beam type structures considering proportional damping

1东南大学土木工程学院, 南京 211189; 2天津市公路工程设计研究院, 天津 300170
Author(s):
1School of Civil Engineering, Southeast University, Nanjing 211189, China
2Tianjin Highway Engineering Design and Research Institute, Tianjin 300170, China

Keywords:

TU446
DOI:
10.3969/j.issn.1001-0505.2018.03.018

Abstract:
To study the effect of damping on damage identification and improve the accuracy of damage diagnosis and safety evaluation of beam type structures, the beam structure was simplified as a proportional damping system. The analytic expression of the proportional damping system was derived based on the first-order sensitivity of elemental modal strain energy. The damage equations of the beam type structures considering proportional damping were established, and the corresponding damage identification method was proposed. A concrete beam numerical model was used to simulate six cases of minor damages. The damage identification results show that the damage index based on the first-order sensitivity of elemental modal strain energy can identify micro damage locations and damage degrees, and the maximum relative error is less than 10%. The simply-supported steel beams with different damage locations in the laboratory and a real girder bridge with actual damages were used to verify the feasibility of the proposed method. The results indicate that the damage identification method based on elemental modal strain energy can identify micro-damages and multiple damages of beam type structures considering proportional damping.

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