Damage Identification Method for Significant Members of Existing Latticed Shells

WU Jun

doi:10.13204/j.gyjzG23012910

Volume 53 Issue 5

May 2023

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WU Jun. Damage Identification Method for Significant Members of Existing Latticed Shells[J]. INDUSTRIAL CONSTRUCTION, 2023, 53(5): 187-195. doi: 10.13204/j.gyjzG23012910

Citation:

WU Jun. Damage Identification Method for Significant Members of Existing Latticed Shells[J]. INDUSTRIAL CONSTRUCTION, 2023, 53(5): 187-195. doi: 10.13204/j.gyjzG23012910

WU Jun. Damage Identification Method for Significant Members of Existing Latticed Shells[J]. INDUSTRIAL CONSTRUCTION, 2023, 53(5): 187-195. doi: 10.13204/j.gyjzG23012910

Citation:

WU Jun. Damage Identification Method for Significant Members of Existing Latticed Shells[J]. INDUSTRIAL CONSTRUCTION, 2023, 53(5): 187-195. doi: 10.13204/j.gyjzG23012910

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Damage Identification Method for Significant Members of Existing Latticed Shells

doi: 10.13204/j.gyjzG23012910

WU Jun

Tongen (Shanghai) Engineering Technology Co., Ltd., Shanghai 200433, China

Received Date: 2023-01-29

Abstract

Abstract

For the problem that it is difficult to completely determine the damage location distribution of the existing latticed shell, a practical residual force decomposition (RFD) method was proposed to identify significantly damaged members in the existing latticed shell. In the proposed RFD method, the significant damage can be recognized corresponding to the changes of the observed eigenvector based on the non-dimensional modal deformation parameters defined in the paper along the axial projection direction of members, which can be transformed into solving a set of multivariate linear equations. To deal with the possibility of infinite solutions in the equation system, the sensitivity analysis of Ritz vectors and the Modal Assurance Criterion (MAC) were employed to assess the importance of members in latticed shell structures. The members with minimal contribution to the structural stiffness under the current loading condition were selected and introduced as additional constraint conditions in the calculation equations, ensuring the uniqueness of the solution to the equation system. A latticed shell structural model was established for computational analysis, and the calculation process of the RFD method in the paper was described in detail and its effectiveness was verified.
- existing latticed shell,
- damage identification,
- residual force decomposition,
- member importance

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References(35)

References

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