Structural damage identification using test static data based on grey system theory

Chen, Xiao-Zhen; Zhu, Hongping; Chen, Chuanyao

doi:10.1631/jzus.2005.a0790

Cited by 38 publications

(24 citation statements)

References 9 publications

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“…The next issue is that modal data for some stiff civil structures are difficult to be measured accurately, especially for high-order modes. In view of this, the static detection algorithms [25][26][27][28][29][30][31][32][33][34] also attracted much attention in civil engineering area in recent years due to their simplicity for implementation. However, most of these methods need a detailed finite element model (FEM) or the baseline parameters of the intact system.…”

Section: Introductionmentioning

confidence: 99%

Damage localization for beam structure by moving load

Yang

Liu

Sun

et al. 2017

Advances in Mechanical Engineering

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A static algorithm is presented in this article for damage localization in beam structures by moving load. Central to the damage localization approach is the combination of the moving load technique and the pure bending theory. The first advantage of the presented algorithm is that only a few sensors are needed in the static test. The second advantage of the presented algorithm is that only the deflection parameters of the current structure are needed in damage localization process. The proposed method is applied to a simple supported beam and its feasibility is verified using damage simulations. It was found that the defect location can be identified by inspecting the sudden increase in the curvature of the deflection curve for the beam. The results showed that the presented algorithm is effective on the localization of single damage or multiple damages in the beam structure without baseline data.

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Section: Introductionmentioning

confidence: 99%

Damage localization for beam structure by moving load

Yang

Liu

Sun

et al. 2017

Advances in Mechanical Engineering

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“…This method created an objective function by using the error in the measured displacements of the actual structure and that of a mathematical model of the structure. Chen et al [10] developed a structural damage detection method by using a limited test static displacement method based on grey system theory. The grey relation coefficient of displacement curvature was defined and used to locate damage in a structure.…”

Section: Introductionmentioning

confidence: 99%

Assessment of the Current State of Internal Force and the Optimization of Cable Force for an Existing Long-span Pre-Stressed Concrete (PC) Cable-stayed Bridge

Ye¹,

Sun²,

Huang³

2017

TOCIEJ

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Introduction:Due to the influence of load, fatigue, corrosion, natural material aging and other long-term adverse factors, the state of the internal force of a cable-stayed bridge will be changed. These long-term effects can result in the bridge not meeting specified functional requirements, and potentially resulting in structural failure. This investigation focuses on the parameter identification of a girder for a pre-stressed concrete (PC) cable-stayed bridge. Without considering the influence of cable relaxation and temperature on the girder's geometric shape, an improved method based on the "cable force-girder's displacement" relationship is proposed. Method:In this method, measurement variations of displacement and cable force are simultaneously obtained, enabling the use of an optimization method to identify parameters which need to be resolved. To verify the proposed method, a single pylon PC cable stayed bridge (2×160m) is selected as a case study. For the state of internal force, results from the case study bridge indicate that the crack resistance value of the girder no longer satisfies the demand of Generalized codes for design of highway bridges and culverts (JTG D60-2004,in Chinese). In order to adjust the internal force, cable force optimization was undertaken, whereby bending energy was taken as the objective function. Result:Using these results the geometric shape of the girder was restored to its initial state. The results also show that neither the crack resistance value nor the compression resistance value of the girder exceeded specified limits, and that the stress of the girder was effectively controlled.

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“…The basic principle of vibrationbased methods is that the changes in the physical properties of the structure will alter the dynamic characteristics of the structure, such as natural frequencies, modal damping, and mode shapes. Hence, changes in these parameters or in their combinations may be considered for localization and quantification, which are important components of damage detection [4][5][6].…”

Section: Introductionmentioning

confidence: 99%

Damage Detection in Grid Structures Using Limited Modal Test Data

Ding

Feng

et al. 2017

Mathematical Problems in Engineering

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The detection of potentially damaged elements in grid structures is a challenging topic. By using limited measured test data, damage detection for grid structures is developed by the modal strain energy (MSE) method. Two critical problems are considered in this paper in developing the MSE method to detect potential damage to the grid structure by using limited modal test data. First, an updated mode shape expansion method based on the modal assurance criterion is adopted to ensure that the modal shape obtained from the reference baseline model is reliable and has explicit physical meanings. Second, after identifying the location of the element damage by the element MSE method with expanded mode shapes, multivariable parameters denoting element damage severity are simultaneously determined. These parameters are included in the column vector and matched with the corresponding element stiffness matrix while the error tolerance value of the Frobenius norm of the column vector is undercontrolled. Finally, a threedimension numerical model of the grid structure is used to represent different damage cases and to demonstrate the effectiveness of the present method. The application of the three-dimension physical model to a full-scale grid structure is also verified. Analysis results demonstrate that the presented damage detection method effectively locates and quantifies single-and multimember damage in grid structures and can be applied in engineering practice.

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Structural damage identification using test static data based on grey system theory

Cited by 38 publications

References 9 publications

Damage localization for beam structure by moving load

Damage localization for beam structure by moving load

Assessment of the Current State of Internal Force and the Optimization of Cable Force for an Existing Long-span Pre-Stressed Concrete (PC) Cable-stayed Bridge

Damage Detection in Grid Structures Using Limited Modal Test Data

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