Research and Application of the Curvature Modal Parameter Method in Quantitative Damage Identigication of String Structures

ZHU Yan; JIANG Qingjie

doi:10.13204/j.gyjzG22062310

Volume 52 Issue 10

Oct. 2022

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ZHU Yan, JIANG Qingjie. Research and Application of the Curvature Modal Parameter Method in Quantitative Damage Identigication of String Structures[J]. INDUSTRIAL CONSTRUCTION, 2022, 52(10): 71-77. doi: 10.13204/j.gyjzG22062310

Citation:

ZHU Yan, JIANG Qingjie. Research and Application of the Curvature Modal Parameter Method in Quantitative Damage Identigication of String Structures[J]. INDUSTRIAL CONSTRUCTION, 2022, 52(10): 71-77. doi: 10.13204/j.gyjzG22062310

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Research and Application of the Curvature Modal Parameter Method in Quantitative Damage Identigication of String Structures

doi: 10.13204/j.gyjzG22062310

ZHU Yan¹,
JIANG Qingjie^{2
,
,}

1. Shaanxi Huashan Road and Bridge Group Co., Ltd., Shaanxi Construction Engineering Holding Group Co., Ltd., Xi'an 710016, China;
2. Chongqing Yedian Garden Engineering Co., Ltd., Chongqing 408200, China

Received Date: 2022-06-23
Available Online: 2023-03-22

Abstract

Abstract

So far, damage identification of string structures based on dynamic detection can be only qualitatively estimated. Aiming at the subsistent problem, a method which could quantitatively identify curvature model parameters was proposed. The improved absolute difference indexes and variation ratio indexes of curvature modals were used to diagnose structural damage. Structural damage locations and damage degrees were determined by the above damage identification indexes. Taking a stadium with long-span beam-string structure as a research object, the ANSYS finite element model was constructed. In order to verify the availability of damage identification indexes, a variety of damage cases were simulated by reducing elastic moduli of structural elements. The results showed that structural damage locations of the upper chord member could be precisely judged by the improved absolute difference indexes of curvature modals, and structural damage degrees of the upper chord member and the lower chord cable could be accurately identified by the variation ratio indexes of curvature modals through lower-order modal data. The method was simple and low-cost.
- string structures,
- curvature modal,
- damage identification,
- finite element analysis,
- damage localization,
- damage quantitation

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References(22)

References

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