Buy article PDF
The purchased file will be sent to you
via email after the payment is completed.
US$ 35
|
Structural Engineering and Mechanics Volume 52, Number 1, October10 2014 , pages 149-172 DOI: https://doi.org/10.12989/sem.2014.52.1.149 |
|
|
|
Damage identification of 2D and 3D trusses by using complete and incomplete noisy measurements |
||
M. Rezaiee-Pajand and M.S. Kazemiyan
|
||
| Abstract | ||
| Four algorithms for damage detection of trusses are presented in this paper. These approaches can detect damage by using both complete and incomplete measurements. The suggested methods are based on the minimization of the difference between the measured and analytical static responses of structures. A non-linear constrained optimization problem is established to estimate the severity and location of damage. To reach the responses, the successive quadratic method is used. Based on the objective function, the stiffness matrix of the truss should be estimated and inverted in the optimization procedure. The differences of the proposed techniques are rooted in the strategy utilized for inverting the stiffness matrix of the damaged structure. Additionally, for separating the probable damaged members, a new formulation is proposed. This scheme is employed prior to the outset of the optimization process. Furthermore, a new tactic is presented to select the appropriate load pattern. To investigate the robustness and efficiency of the authors\' method, several numerical tests are performed. Moreover, Monte Carlo simulation is carried out to assess the effect of noisy measurements on the estimated parameters. | ||
| Key Words | ||
| damage assessment; updated matrix; Sherman-Morrison-Woodbury formula; truss structure; optimization; Monte Carlo simulation; incomplete measurement | ||
| Address | ||
| M. Rezaiee-Pajand and M.S. Kazemiyana: Department of Civil Engineering, Ferdowsi University of Mashhad, Azadi Sq., Mashhad, Khorasan Razavi, Iran | ||