Damage Identification for Shear-Type Structures Using the Change of Generalized Shear Energy

Sun, Yun; Yang, Qiuwei; Peng, Xi

doi:10.3390/coatings12020192

Cited by 2 publications

(3 citation statements)

References 43 publications

(54 reference statements)

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“…An experimental steel beam was further used to verify the proposed method. By comparing the pure static algorithm, the pure dynamic algorithm, and the hybrid algorithm, the following main conclusions could be obtained: (1) The symmetry of a structure may lead to a missed diagnosis when using pure static or pure dynamic methods. The adverse effect of structural symmetry on defect diagnosis can be overcome by using asymmetric gravity loading.…”

Section: Discussionmentioning

confidence: 99%

“…A structure will inevitably have faults due to the influence of environmental corrosion, material fatigue, disaster load, and so on. A fault in a structure will lead to a change in the structure's response parameters under a static or dynamic load [1][2][3]. In practice, the static displacement of a structure can be measured through an optical system, and the vibration modal data of a structure can be tested by a vibration test system.…”

Section: Introductionmentioning

confidence: 99%

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Structural Fault Diagnosis Based on Static and Dynamic Response Parameters

2023

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Structural fault diagnosis is an important subject for ensuring the normal use of structures. More test data will help to improve the accuracy and reliability of structural fault diagnosis. Therefore, a structural fault detection algorithm based on static–dynamic mixed sensitivity analysis is proposed. The vibration parameters used were the vibration modes of some of the nodes in the structure measured by the vibration test system. The static response parameter used was the vertical displacement of the structure under the gravity load measured by the static test system. In particular, the gravity load and the structure were connected rigidly to form a new added-mass system. The vibration mode of the additional-mass system was measured again to obtain more equations for fault evaluation. Based on the static and dynamic measurement data, the failure coefficients of all components in the structure were calculated through the mixed sensitivity of the static displacement and vibration-mode shape. According to the calculated value of the failure coefficient, the failure state of all components in the structure could be finally evaluated. The main innovation of the proposed method was the use of the static load as a part of the new added-mass system to obtain more vibration parameters for the defect diagnosis. The implementation process and effect of this method were verified using a numerical truss structure and an experimental steel beam structure. Moreover, the defect diagnosis results of the proposed hybrid method were compared with those of a pure static algorithm and a pure dynamic algorithm to illustrate the advantages of the hybrid method. The research results showed that this method has the advantages of simple implementation and high diagnosis accuracy. Especially for symmetric structures, the proposed method can successfully avoid the possible missed diagnoses of the pure static algorithm and pure dynamic method. The algorithm provides a simple and feasible method for structural defect identification.

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Section: Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Structural Fault Diagnosis Based on Static and Dynamic Response Parameters

2023

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“…The identification of bridge structure damage has attracted extensive attention recently [ 1 , 2 , 3 ]. According to the type of data used, damage identification methods can be divided into dynamic methods and static methods.…”

Section: Introductionmentioning

confidence: 99%

Structural Damage Identification Using the Optimal Achievable Displacement Variation

2022

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To ensure the safe use of structures, it is essential to develop efficient damage identification techniques. In this paper, a brand-new approach to identifying structural deterioration based on static displacement is proposed. First, the relationship between the displacement variation and the damaged element is derived from the static response equations before and after damage. Subsequently, the optimal achievable displacement variation is defined to determine the damage location in the structure. A progressive elimination strategy is suggested to identify the real damaged parts and weed out the pseudo-damaged elements by measuring the distance between the measured and the best possible displacement variation. After determining the damage location, the corresponding damage extent can be calculated by a system of linear equations. The proposed approach has been tested on a beam structure and truss structure using simulated and experimental data. Compared with the existing static sensitivity method, the suggested method does not result in misjudgment and has higher identification accuracy. It has been demonstrated that the suggested approach is effective at locating and assessing the extent of structural damage.

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Damage Identification for Shear-Type Structures Using the Change of Generalized Shear Energy

Cited by 2 publications

References 43 publications

Structural Fault Diagnosis Based on Static and Dynamic Response Parameters

Structural Fault Diagnosis Based on Static and Dynamic Response Parameters

Structural Damage Identification Using the Optimal Achievable Displacement Variation

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