SENSITIVITY ANALYSIS FOR STRUCTURAL DAMAGE DETECTION THROUGH STRAIN ENERGY

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Talebpour M.H.; Razavizade Mashizi S.M.A.; Goudarzi A.

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Journal Paper

Paper Information

Journal: International Journal of Optimization in Civil Engineering Year:2024 | Volume:14 | Issue:1 Page(s): 95-113

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Information Journal Paper

Title

SENSITIVITY ANALYSIS FOR STRUCTURAL DAMAGE DETECTION THROUGH STRAIN ENERGY

Author(s)

Talebpour M.H. | Razavizade Mashizi S.M.A. | Goudarzi A. | Issue Writer Certificate

Keywords

Sensitivity analysis

modal strain energy (MSE)

damage detection

shuffled shepherd optimization algorithm (SSOA)

Abstract

This paper proposes a method for structural damage detection through the Sensitivity analysis of modal shapes in the calculation of modal strain energy (MSE). For this purpose, sensitivity equations were solved to determine the strain energy based on dynamic data (i.e., modal shapes). An objective function was then presented through the sensitivity-based MSE to detect structural damage. Due to the nonlinearity of sensitivity equations, the objective function of the proposed formulation can be minimized through the shuffled shepherd optimization algorithm (SSOA). The first few modes were employed for damage detection in solving the inverse problem. The proposed formulation was evaluated in a few numerical examples under different conditions. The numerical results indicated that the proposed formulation was efficient and effective in solving the inverse problem of damage detection. The proposed method not only minimized sensitivity to measurement errors but also effectively identified the location and severity of structural damage.

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